Ford Escape Manuals
Ford Escape 2020-2024 Service Manual / Electrical / Lighting / Exterior Lighting / Diagnosis and Testing - Parking, Rear and License Plate Lamps

Ford Escape: Exterior Lighting / Diagnosis and Testing - Parking, Rear and License Plate Lamps

Diagnostic Trouble Code (DTC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


  Diagnostic Trouble Code Chart


Module   DTC Description Action
  BCM B10F3:11 Left Front Position Light: Circuit Short to Ground   GO to Pinpoint Test A
  BCM B10F3:11 Left Front Position Light: Circuit Short to Ground   GO to Pinpoint Test B
  BCM B10F3:11 Left Front Position Light: Circuit Short to Ground   GO to Pinpoint Test C
  BCM B10F3:15 Left Front Position Light: Circuit Short to Battery or Open   GO to Pinpoint Test A
  BCM B10F3:15 Left Front Position Light: Circuit Short to Battery or Open   GO to Pinpoint Test B
  BCM B10F3:15 Left Front Position Light: Circuit Short to Battery or Open   GO to Pinpoint Test C
  BCM B10F4:11 Right Front Position Light: Circuit Short to Ground   GO to Pinpoint Test A
  BCM B10F4:11 Right Front Position Light: Circuit Short to Ground   GO to Pinpoint Test B
  BCM B10F4:11 Right Front Position Light: Circuit Short to Ground   GO to Pinpoint Test C
  BCM B10F4:15 Right Front Position Light: Circuit Short to Battery or Open   GO to Pinpoint Test A
  BCM B10F4:15 Right Front Position Light: Circuit Short to Battery or Open   GO to Pinpoint Test B
  BCM B10F4:15 Right Front Position Light: Circuit Short to Battery or Open   GO to Pinpoint Test C
  BCM B1445:11 Rear Park Lamps Output: Circuit Short to Ground   GO to Pinpoint Test A
  BCM B1445:11 Rear Park Lamps Output: Circuit Short to Ground   GO to Pinpoint Test B
  BCM B1445:11 Rear Park Lamps Output: Circuit Short to Ground   GO to Pinpoint Test C
  BCM B1445:15 Rear Park Lamps Output: Circuit Short to Battery or Open   GO to Pinpoint Test A
  BCM B1445:15 Rear Park Lamps Output: Circuit Short to Battery or Open   GO to Pinpoint Test B
  BCM B1445:15 Rear Park Lamps Output: Circuit Short to Battery or Open   GO to Pinpoint Test C
  BCM B1447:11 Parklamp On Switch Input: Circuit Short to Ground  
REFER to: Headlamps (417-01 Exterior Lighting, Diagnosis and Testing).
  BCM B149E:11 Left Front Position/Sidemarker: Circuit Short To Ground   GO to Pinpoint Test A
  BCM B149E:11 Left Front Position/Sidemarker: Circuit Short To Ground   GO to Pinpoint Test B
  BCM B149E:11 Left Front Position/Sidemarker: Circuit Short To Ground   GO to Pinpoint Test C
  BCM B149E:15 Left Front Position/Sidemarker: Circuit Short To Battery or Open   GO to Pinpoint Test A
  BCM B149E:15 Left Front Position/Sidemarker: Circuit Short To Battery or Open   GO to Pinpoint Test B
  BCM B149E:15 Left Front Position/Sidemarker: Circuit Short To Battery or Open   GO to Pinpoint Test C
  BCM B149F:11 Right Front Position/Sidemarker: Circuit Short To Ground   GO to Pinpoint Test A
  BCM B149F:11 Right Front Position/Sidemarker: Circuit Short To Ground   GO to Pinpoint Test B
  BCM B149F:11 Right Front Position/Sidemarker: Circuit Short To Ground   GO to Pinpoint Test C
  BCM B149F:15 Right Front Position/Sidemarker: Circuit Short To Battery or Open   GO to Pinpoint Test A
  BCM B149F:15 Right Front Position/Sidemarker: Circuit Short To Battery or Open   GO to Pinpoint Test B
  BCM B149F:15 Right Front Position/Sidemarker: Circuit Short To Battery or Open   GO to Pinpoint Test C
  BCM B14A2:11 Tailgate/Liftgate Applique Lamps: Circuit Short To Ground   GO to Pinpoint Test A
  BCM B14A2:11 Tailgate/Liftgate Applique Lamps: Circuit Short To Ground   GO to Pinpoint Test B
  BCM B14A2:11 Tailgate/Liftgate Applique Lamps: Circuit Short To Ground   GO to Pinpoint Test C
  BCM B14A2:15 Tailgate/Liftgate Applique Lamps: Circuit Short To Battery or Open   GO to Pinpoint Test A
  BCM B14A2:15 Tailgate/Liftgate Applique Lamps: Circuit Short To Battery or Open   GO to Pinpoint Test B
  BCM B14A2:15 Tailgate/Liftgate Applique Lamps: Circuit Short To Battery or Open   GO to Pinpoint Test C
  BCM B14B2:11 Left Position Lamps: Circuit Short To Ground   GO to Pinpoint Test A
  BCM B14B2:11 Left Position Lamps: Circuit Short To Ground   GO to Pinpoint Test B
  BCM B14B2:11 Left Position Lamps: Circuit Short To Ground   GO to Pinpoint Test C
  BCM B14B2:15 Left Position Lamps: Circuit Short To Battery or Open   GO to Pinpoint Test A
  BCM B14B2:15 Left Position Lamps: Circuit Short To Battery or Open   GO to Pinpoint Test B
  BCM B14B2:15 Left Position Lamps: Circuit Short To Battery or Open   GO to Pinpoint Test C
  BCM B14B3:11 Right Position Lamps: Circuit Short To Ground   GO to Pinpoint Test A
  BCM B14B3:11 Right Position Lamps: Circuit Short To Ground   GO to Pinpoint Test B
  BCM B14B3:11 Right Position Lamps: Circuit Short To Ground   GO to Pinpoint Test C
  BCM B14B3:15 Right Position Lamps: Circuit Short To Battery or Open   GO to Pinpoint Test A
  BCM B14B3:15 Right Position Lamps: Circuit Short To Battery or Open   GO to Pinpoint Test B
  BCM B14B3:15 Right Position Lamps: Circuit Short To Battery or Open   GO to Pinpoint Test C
  BCM B1538:11 Left Rear Position Lamp Output: Circuit Short To Ground   GO to Pinpoint Test A
  BCM B1538:11 Left Rear Position Lamp Output: Circuit Short To Ground   GO to Pinpoint Test B
  BCM B1538:11 Left Rear Position Lamp Output: Circuit Short To Ground   GO to Pinpoint Test C
  BCM B1538:15 Left Rear Position Lamp Output: Circuit Short To Battery or Open   GO to Pinpoint Test A
  BCM B1538:15 Left Rear Position Lamp Output: Circuit Short To Battery or Open   GO to Pinpoint Test B
  BCM B1538:15 Left Rear Position Lamp Output: Circuit Short To Battery or Open   GO to Pinpoint Test C
  BCM B1539:11 Right Rear Position Lamp Output: Circuit Short To Ground   GO to Pinpoint Test A
  BCM B1539:11 Right Rear Position Lamp Output: Circuit Short To Ground   GO to Pinpoint Test B
  BCM B1539:11 Right Rear Position Lamp Output: Circuit Short To Ground   GO to Pinpoint Test C
  BCM B1539:15 Right Rear Position Lamp Output: Circuit Short To Battery or Open   GO to Pinpoint Test A
  BCM B1539:15 Right Rear Position Lamp Output: Circuit Short To Battery or Open   GO to Pinpoint Test B
  BCM B1539:15 Right Rear Position Lamp Output: Circuit Short To Battery or Open   GO to Pinpoint Test C

Global Customer Symptom Code (GCSC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


Symptom Action
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Inoperative GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Inoperative GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Inoperative GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Stays On GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Stays On GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Stays On GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > Tail Lamp > Inoperative GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Tail Lamp > Inoperative GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Tail Lamp > Inoperative GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > Tail Lamp > Stays On GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Tail Lamp > Stays On GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Tail Lamp > Stays On GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > Side Marker > Inoperative GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Side Marker > Inoperative GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Side Marker > Inoperative GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > Side Marker > Stays On GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Side Marker > Stays On GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Side Marker > Stays On GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > License Plate > Inoperative GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > License Plate > Inoperative GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > License Plate > Inoperative GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > License Plate > Stays On GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > License Plate > Stays On GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > License Plate > Stays On GO to Pinpoint Test C

Symptom Charts

Symptom Chart: Parking, Rear and License Plate Lamps

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Condition Actions
A module does not respond to the diagnostic scan tool  
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
One or more parking, rear or license plate lamps are inoperative or always on — Low series halogen headlamps   GO to Pinpoint Test A
One or more parking, rear or license plate lamps are inoperative or always on — Mid series halogen headlamps   GO to Pinpoint Test B
One or more parking, rear or license plate lamps are inoperative or always on — LED headlamps   GO to Pinpoint Test C
One or more front LED daytime running lamp/front parking lamp is inoperative or does not dim if DRL are active — Halogen headlamps, if equipped with front LED daytime running lamp/front parking lamps   GO to Pinpoint Test B
One or more front LED daytime running lamp/front parking lamp is inoperative or does not dim if DRL are active — LED headlamps   GO to Pinpoint Test C

Pinpoint Tests


PINPOINT TEST A: ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMPS ARE INOPERATIVE OR ALWAYS ON — LOW SERIES HALOGEN HEADLAMPS

Refer to Wiring Diagrams Cell 92 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B10F3:11 Left front position light: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH front parking lamps output circuit.
BCM B10F3:15 Left front position light: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH front parking lamps output circuit.
BCM B10F4:11 Right front position light: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH front parking lamps output circuit.
BCM B10F4:15 Right front position light: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH front parking lamps output circuit.
BCM B1445:11 Rear Park Lamps Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the license plate lamps output circuit.
BCM B1445:15 Rear Park Lamps Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the license plate lamps output circuit.
BCM B149E:11 Left Front Position/Sidemarker: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH front parking lamps output circuit.
BCM B149E:15 Left Front Position/Sidemarker: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH front parking lamps output circuit.
BCM B149F:11 Right Front Position/Sidemarker: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH front parking lamps output circuit.
BCM B149F:15 Right Front Position/Sidemarker: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH front parking lamps output circuit.
BCM B14A2:11 Tailgate/Liftgate Applique Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the license plate lamps output circuit.
BCM B14A2:15 Tailgate/Liftgate Applique Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the license plate lamps output circuit.
BCM B14B2:11 Left Position Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH front parking lamps output circuit.
BCM B14B2:15 Left Position Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH front parking lamps output circuit.
BCM B14B3:11 Right Position Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH front parking lamps output circuit.
BCM B14B3:15 Right Position Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH front parking lamps output circuit.
BCM B1538:11 Left Rear Position Lamp Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH rear parking lamps output circuit.
BCM B1538:15 Left Rear Position Lamp Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH rear parking lamps output circuit.
BCM B1539:11 Right Rear Position Lamp Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH rear parking lamps output circuit.
BCM B1539:15 Right Rear Position Lamp Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH rear parking lamps output circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Bulb
  • Reversing lamp assembly
  • Headlamp assembly
  • Rear lamp assembly
  • License plate lamp
  • LED control module
  • BCM
A1 DETERMINE IF ALL THE PARKING LAMPS ARE INOPERATIVE
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position and observe all the parking lamps.
  • Place the headlamp switch in the OFF position and observe all the parking lamps.

Are any of the parking lamps always on?
Yes If one or more of the parking lamps are always on, GO to A2
If all the parking lamps are always on, GO to A18
No If an individual parking lamp or both license plate lamps only are inoperative, GO to A3
If an individual license plate lamp is inoperative, INSTALL a new license plate lamp.
REFER to: License Plate Lamp (417-01 Exterior Lighting, Removal and Installation). If both the front side marker lamps and both license plate lamps are inoperative, GO to A5
If both the LH front parking lamp and LH rear side marker lamp or both the RH front parking lamp and RH rear side marker lamp are inoperative, GO to A14
If both the LH rear lamp parking and LH reversing lamp assembly parking lamps or both the RH rear lamp parking and RH reversing lamp assembly parking lamps are inoperative, GO to A10
If all parking lamps are inoperative, GO to A18

A2 CHECK THE BCM (BODY CONTROL MODULE) PARKING LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCM C2280E (For front parking and rear side marker lamps).
  • Disconnect BCM C2280F (For front side marker, rear parking, reverse lamps assembly parking and license plate lamps).
  • Ignition ON.

Do the parking lamps continue to illuminate?
Yes REPAIR the affected circuit.
No GO to A18

A3 CHECK THE INOPERATIVE PARKING LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect For a front parking or side marker lamp, inoperative LH Headlamp C1021 or RH Headlamp C1041 .
  • Disconnect For a rear parking or side marker lamp, inoperative LH Rear Lamp C423 or RH Rear Lamp C422 .
  • Disconnect For a reversing lamp assembly parking lamp, inoperative LH Reversing Lamp C451 or RH Reversing Lamp C461 .
  • Disconnect For the license plate lamps, License Plate Lamp C4046 .
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • For a front parking lamp, measure:
    Click to display connectors

      LH Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-6   Ground

    Click to display connectors

      RH Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-6   Ground
  • For a front side marker lamp, measure:
    Click to display connectors

      LH Front Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-1   Ground

    Click to display connectors

      RH Front Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-1   Ground
  • For a rear parking lamp, measure:
    Click to display connectors

      LH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   Ground

    Click to display connectors

      RH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   Ground
  • For a reversing lamp assembly parking lamp, measure:
    Click to display connectors

      LH Reversing Lamp


    Positive Lead Measurement / Action Negative Lead
      C451-3   Ground

    Click to display connectors

      RH Reversing Lamp


    Positive Lead Measurement / Action Negative Lead
      C461-3   Ground
  • For license plate lamps, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4046-1   Ground

Is the voltage greater than 11 volts?
Yes GO to A4
No REPAIR the circuit.

A4 CHECK THE INOPERATIVE PARKING LAMP GROUND CIRCUIT
  • For a front parking lamp, measure:
    Click to display connectors

      LH Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-6   C1021-8

    Click to display connectors

      RH Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-6   C1041-8
  • For a front side marker lamp, measure:
    Click to display connectors

      LH Front Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-1   C1021-8

    Click to display connectors

      RH Front Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-1   C1041-8
  • For a rear parking lamp, measure:
    Click to display connectors

      LH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   C423-4

    Click to display connectors

      RH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   C422-4
  • For a reversing lamp assembly parking lamp, measure:
    Click to display connectors

      LH Reversing Lamp


    Positive Lead Measurement / Action Negative Lead
      C451-3   C451-4

    Click to display connectors

      RH Reversing Lamp


    Positive Lead Measurement / Action Negative Lead
      C461-3   C461-4
  • For license plate lamps, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4046-1   C4046-3

Is the voltage greater than 11 volts?
Yes For a front parking lamp, INSTALL a new park/turn bulb.
REFER to: Front Turn Signal Lamp Bulb (417-01 Exterior Lighting, Removal and Installation). For a front side marker lamp, INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation). For a rear parking lamp, INSTALL a new rear lamp assembly,
REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation). For a reversing lamp assembly parking lamp, INSTALL a new reversing lamp,
REFER to: Reversing Lamp (417-01 Exterior Lighting, Removal and Installation). For license plate lamps, INSTALL a new license plate lamp,
REFER to: License Plate Lamp (417-01 Exterior Lighting, Removal and Installation).
No REPAIR the circuit.

A5 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT SIDE MARKER AND LICENSE PLATE LAMPS WITH LH (LEFT-HAND) HEADLAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect LH Headlamp C1021 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1021-1   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to A6

A6 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT SIDE MARKER AND LICENSE PLATE LAMPS WITH RH (RIGHT-HAND) HEADLAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect RH Headlamp C1041 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1021-1   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to A7

A7 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT SIDE MARKER AND LICENSE PLATE LAMPS WITH LICENSE PLATE LAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect License Plate Lamp C4046 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1284-1   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new license plate lamp.
REFER to: License Plate Lamp (417-01 Exterior Lighting, Removal and Installation).
No GO to A8

A8 CHECK THE FRONT SIDE MARKER AND LICENSE PLATE LAMPS SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect BCM C2280F .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1021-1   C2280F-52

Is the resistance less than 3 ohms?
Yes GO to A9
No REPAIR the circuit in question.

A9 CHECK VOLTAGE CIRCUIT TO THE FRONT SIDE MARKER AND LICENSE PLATE LAMPS FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1021-1   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to A18
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

A10 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS WITH THE REAR LAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect Inoperative LH Rear Lamp C423 or RH Rear Lamp C422 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   Ground

    Click to display connectors

      RH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new rear lamp assembly,
REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to A11

A11 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS WITH REVERSING LAMP ASSEMBLY DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect Inoperative LH Reversing Lamp C451 or RH Reversing Lamp C461 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   Ground

    Click to display connectors

      RH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new reversing lamp.
REFER to: Reversing Lamp (417-01 Exterior Lighting, Removal and Installation).
No GO to A12

A12 CHECK THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect BCM C2280F .
  • Measure:
    Click to display connectors

      LH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   C2280F-53

    Click to display connectors

      RH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   C2280F-48

Is the resistance less than 3 ohms?
Yes GO to A13
No REPAIR the circuit in question.

A13 CHECK VOLTAGE CIRCUIT TO THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors

      LH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   Ground

    Click to display connectors

      RH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to A18
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

A14 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT PARKING LAMP AND REAR SIDE MARKER LAMP WITH THE HEADLAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect Inoperative LH Headlamp C1021 or RH Headlamp C1041 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1021-6   Ground

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1041-6   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new park/turn bulb.
REFER to: Front Turn Signal Lamp Bulb (417-01 Exterior Lighting, Removal and Installation).
TEST the system for normal operation. If the concern is still present, INSTALL a new headlamp assembly. REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to A15

A15 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT PARKING LAMP AND REAR SIDE MARKER LAMP WITH REAR LAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect Inoperative LH Rear Lamp C423 or RH Rear Lamp C422 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1021-6   Ground

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1041-6   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new rear side marker bulb.
REFER to: Rear Lamp Bulb (417-01 Exterior Lighting, Removal and Installation).
TEST the system for normal operation. If the concern is still present, INSTALL a new rear lamp assembly, REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to A16

A16 CHECK THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect BCM C2280E .
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1021-6   C2280E-14

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1041-6   C2280E-28

Is the resistance less than 3 ohms?
Yes GO to A17
No REPAIR the circuit in question.

A17 CHECK VOLTAGE CIRCUIT TO THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1021-6   Ground

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1041-6   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to A18
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

A18 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST B: ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMPS ARE INOPERATIVE OR ALWAYS ON — MID SERIES HALOGEN HEADLAMPS

Refer to Wiring Diagrams Cell 92 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B10F3:11 Left front position light: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH front parking lamps output circuit.
BCM B10F3:15 Left front position light: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH front parking lamps output circuit.
BCM B10F4:11 Right front position light: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH front parking lamps output circuit.
BCM B10F4:15 Right front position light: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH front parking lamps output circuit.
BCM B1445:11 Rear Park Lamps Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the license plate lamps output circuit.
BCM B1445:15 Rear Park Lamps Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the license plate lamps output circuit.
BCM B149E:11 Left Front Position/Sidemarker: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH front parking lamps output circuit.
BCM B149E:15 Left Front Position/Sidemarker: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH front parking lamps output circuit.
BCM B149F:11 Right Front Position/Sidemarker: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH front parking lamps output circuit.
BCM B149F:15 Right Front Position/Sidemarker: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH front parking lamps output circuit.
BCM B14A2:11 Tailgate/Liftgate Applique Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the license plate lamps output circuit.
BCM B14A2:15 Tailgate/Liftgate Applique Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the license plate lamps output circuit.
BCM B14B2:11 Left Position Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH front parking lamps output circuit.
BCM B14B2:15 Left Position Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH front parking lamps output circuit.
BCM B14B3:11 Right Position Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH front parking lamps output circuit.
BCM B14B3:15 Right Position Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH front parking lamps output circuit.
BCM B1538:11 Left Rear Position Lamp Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH rear parking lamps output circuit.
BCM B1538:15 Left Rear Position Lamp Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH rear parking lamps output circuit.
BCM B1539:11 Right Rear Position Lamp Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH rear parking lamps output circuit.
BCM B1539:15 Right Rear Position Lamp Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH rear parking lamps output circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Bulb
  • Reversing lamp assembly
  • Headlamp assembly
  • License plate lamp
  • Rear lamp assembly
  • LED control module
  • BCM
B1 DETERMINE IF ALL THE PARKING LAMPS ARE INOPERATIVE
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position and observe all the parking lamps.
  • Place the headlamp switch in the OFF position and observe all the parking lamps.

Are any of the parking lamps always on?
Yes If one or more of the parking lamps are always on, GO to B2
If all the parking lamps are always on, GO to B18
No If an individual front side marker lamp, LED DRL /front parking lamp, rear parking lamp, reversing lamp assembly parking lamp or both license plate lamps only are inoperative, GO to B3
If both LED DRL /front parking lamps are inoperative or do not dim when the DRL are on and both license plate lamps are inoperative, GO to B5
If the LH front side marker, LH rear lamp parking and LH reversing lamp assembly parking lamps or the RH front side marker, RH rear lamp parking and RH reversing lamp assembly parking lamps are inoperative, GO to B10
If an individual rear side marker lamp is inoperative, GO to B15
If an individual license plate lamp is inoperative, INSTALL a new license plate lamp.
REFER to: License Plate Lamp (417-01 Exterior Lighting, Removal and Installation). If all parking lamps are inoperative, GO to B18

B2 CHECK THE BCM (BODY CONTROL MODULE) PARKING LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCM C2280E (For rear side marker lamps).
  • Disconnect BCM C2280F (For front side marker, LED DRL /front parking, rear parking, reverse lamps assembly parking and license plate lamps).
  • Ignition ON.

Do the parking lamps continue to illuminate?
Yes REPAIR the affected circuit.
No GO to B18

B3 CHECK THE INOPERATIVE PARKING LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect For a LED DRL /front parking or front side marker lamp, inoperative LH Headlamp C1021 or RH Headlamp C1041 .
  • Disconnect For a rear parking lamp, inoperative LH Rear Lamp C423 or RH Rear Lamp C422 .
  • Disconnect For a reversing lamp assembly parking lamp, inoperative LH Reversing Lamp C451 or RH Reversing Lamp C461 .
  • Disconnect For the license plate lamps, License Plate Lamp C4046 .
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • For a LED DRL /front parking lamp, measure:
    Click to display connectors

      LH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-1   Ground

    Click to display connectors

      RH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-1   Ground
  • For a front side marker lamp, measure:
    Click to display connectors

      LH Front Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-15   Ground

    Click to display connectors

      RH Front Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-15   Ground
  • For a rear parking lamp, measure:
    Click to display connectors

      LH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   Ground

    Click to display connectors

      RH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   Ground
  • For a reversing lamp assembly parking lamp, measure:
    Click to display connectors

      LH Reversing Lamp


    Positive Lead Measurement / Action Negative Lead
      C451-3   Ground

    Click to display connectors

      RH Reversing Lamp


    Positive Lead Measurement / Action Negative Lead
      C461-3   Ground
  • For license plate lamps, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4046-1   Ground

Is the voltage greater than 11 volts?
Yes GO to B4
No REPAIR the circuit.

B4 CHECK THE INOPERATIVE PARKING LAMP GROUND CIRCUIT
  • For a LED DRL /front parking lamp, measure:
    Click to display connectors

      LH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-1   C1021-8

    Click to display connectors

      RH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-1   C1041-8
  • For a front side marker lamp, measure:
    Click to display connectors

      LH Front Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-15   C1021-8

    Click to display connectors

      RH Front Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-15   C1041-8
  • For a rear parking lamp, measure:
    Click to display connectors

      LH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   C423-4

    Click to display connectors

      RH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   C422-4
  • For a reversing lamp assembly parking lamp, measure:
    Click to display connectors

      LH Reversing Lamp


    Positive Lead Measurement / Action Negative Lead
      C451-3   C451-4

    Click to display connectors

      RH Reversing Lamp


    Positive Lead Measurement / Action Negative Lead
      C461-3   C461-4
  • For license plate lamps, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4046-1   C4046-3

Is the voltage greater than 11 volts?
Yes For a LED DRL / front parking or front side marker lamp, INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation). For a rear parking lamp, INSTALL a new rear lamp assembly,
REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation). For a reversing lamp assembly parking lamp, INSTALL a new reversing lamp,
REFER to: Reversing Lamp (417-01 Exterior Lighting, Removal and Installation). For license plate lamps, INSTALL a new license plate lamp,
REFER to: License Plate Lamp (417-01 Exterior Lighting, Removal and Installation).
No REPAIR the circuit.

B5 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE LED (LIGHT EMITTING DIODE) DRL (DAYTIME RUNNING LAMPS) /FRONT PARKING LAMP AND LICENSE PLATE LAMPS WITH LH (LEFT-HAND) HEADLAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect LH Headlamp C1021 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1021-1   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to B6

B6 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE LED (LIGHT EMITTING DIODE) DRL (DAYTIME RUNNING LAMPS) /FRONT PARKING LAMP AND LICENSE PLATE LAMPS WITH RH (RIGHT-HAND) HEADLAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect RH Headlamp C1041 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1021-1   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to B7

B7 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE LED (LIGHT EMITTING DIODE) DRL (DAYTIME RUNNING LAMPS) /FRONT PARKING LAMP AND LICENSE PLATE LAMPS WITH LICENSE PLATE LAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect License Plate Lamp C4046 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1284-1   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new license plate lamp.
REFER to: License Plate Lamp (417-01 Exterior Lighting, Removal and Installation).
No GO to B8

B8 CHECK THE LED (LIGHT EMITTING DIODE) DRL (DAYTIME RUNNING LAMPS) /FRONT PARKING LAMP AND LICENSE PLATE LAMPS SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect BCM C2280F .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1021-1   C2280F-52

Is the resistance less than 3 ohms?
Yes GO to B9
No REPAIR the circuit in question.

B9 CHECK VOLTAGE CIRCUIT TO THE LED (LIGHT EMITTING DIODE) DRL (DAYTIME RUNNING LAMPS) /FRONT PARKING LAMP AND LICENSE PLATE LAMPS FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1021-1   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to B18
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

B10 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT SIDE MARKER, REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS WITH THE HEADLAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect Inoperative LH Headlamp C1021 or RH Headlamp C1041 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1021-15   Ground

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1041-15   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to B11

B11 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT SIDE MARKER, REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS WITH THE REAR LAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect Inoperative LH Rear Lamp C423 or RH Rear Lamp C422 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1021-15   Ground

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1041-15   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new rear lamp assembly,
REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to B12

B12 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT SIDE MARKER, REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS WITH REVERSING LAMP ASSEMBLY DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect Inoperative LH Reversing Lamp C451 or RH Reversing Lamp C461 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1021-15   Ground

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1041-15   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new reversing lamp.
REFER to: Reversing Lamp (417-01 Exterior Lighting, Removal and Installation).
No GO to B13

B13 CHECK THE FRONT SIDE MARKER, REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect BCM C2280F .
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1021-15   C2280F-53

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1041-15   C2280F-48

Is the resistance less than 3 ohms?
Yes GO to B14
No REPAIR the circuit in question.

B14 CHECK VOLTAGE CIRCUIT TO THE FRONT SIDE MARKER, REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1021-15   Ground

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1041-15   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to B18
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

B15 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT PARKING LAMP AND REAR SIDE MARKER LAMP WITH REAR LAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect Inoperative LH Rear Lamp C423 or RH Rear Lamp C422 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-6   Ground

    Click to display connectors

      RH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-6   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new rear side marker bulb.
REFER to: Rear Lamp Bulb (417-01 Exterior Lighting, Removal and Installation).
TEST the system for normal operation. If the concern is still present, INSTALL a new rear lamp assembly, REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to B16

B16 CHECK THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect BCM C2280E .
  • Measure:
    Click to display connectors

      LH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-6   C2280E-14

    Click to display connectors

      RH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-6   C2280E-28

Is the resistance less than 3 ohms?
Yes GO to B17
No REPAIR the circuit in question.

B17 CHECK VOLTAGE CIRCUIT TO THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors

      LH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-6   Ground

    Click to display connectors

      RH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-6   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to B18
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

B18 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST C: ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMPS ARE INOPERATIVE OR ALWAYS ON — HIGH SERIES LED (LIGHT EMITTING DIODE) HEADLAMPS

Refer to Wiring Diagrams Cell 92 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B10F3:11 Left front position light: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH front parking lamps output circuit.
BCM B10F3:15 Left front position light: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH front parking lamps output circuit.
BCM B10F4:11 Right front position light: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH front parking lamps output circuit.
BCM B10F4:15 Right front position light: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH front parking lamps output circuit.
BCM B1445:11 Rear Park Lamps Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the license plate lamps output circuit.
BCM B1445:15 Rear Park Lamps Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the license plate lamps output circuit.
BCM B149E:11 Left Front Position/Sidemarker: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH front parking lamps output circuit.
BCM B149E:15 Left Front Position/Sidemarker: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH front parking lamps output circuit.
BCM B149F:11 Right Front Position/Sidemarker: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH front parking lamps output circuit.
BCM B149F:15 Right Front Position/Sidemarker: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH front parking lamps output circuit.
BCM B14A2:11 Tailgate/Liftgate Applique Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the license plate lamps output circuit.
BCM B14A2:15 Tailgate/Liftgate Applique Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the license plate lamps output circuit.
BCM B14B2:11 Left Position Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH front parking lamps output circuit.
BCM B14B2:15 Left Position Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH front parking lamps output circuit.
BCM B14B3:11 Right Position Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH front parking lamps output circuit.
BCM B14B3:15 Right Position Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH front parking lamps output circuit.
BCM B1538:11 Left Rear Position Lamp Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH rear parking lamps output circuit.
BCM B1538:15 Left Rear Position Lamp Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH rear parking lamps output circuit.
BCM B1539:11 Right Rear Position Lamp Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH rear parking lamps output circuit.
BCM B1539:15 Right Rear Position Lamp Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH rear parking lamps output circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Bulb
  • Reversing lamp assembly
  • Headlamp assembly
  • License plate lamp
  • Rear lamp assembly
  • LED control module
  • BCM
C1 OBSERVE PARKING LAMPS OPERATION
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position and observe all the parking lamps.
  • Place the headlamp switch in the OFF position and observe all the parking lamps.

Are any of the parking lamps always on?
Yes If one or more parking lamps are always on, GO to C2
If all the parking lamps are always on, GO to C20
No If an individual LED DRL /front parking lamp is inoperative or does not dim when the DRL are on, GO to C5
If an individual rear side marker lamp is inoperative, GO to C5
If an individual front side marker lamp, rear parking lamp, reversing lamp assembly parking lamp or both license plate lamps only are inoperative, GO to C3
If an individual license plate lamp is inoperative, INSTALL a new license plate lamp.
REFER to: License Plate Lamp (417-01 Exterior Lighting, Removal and Installation). If both the front side marker lamps and both license plate lamps are inoperative, GO to C10
If both the LH rear lamp parking and LH reversing lamp assembly parking lamps or both the RH rear lamp parking and RH reversing lamp assembly parking lamps are inoperative, GO to C15
If all parking lamps are inoperative, GO to C20

C2 CHECK THE BCM (BODY CONTROL MODULE) PARKING LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCM C2280E (For rear side marker and LED DRL /front parking lamps).
  • Disconnect BCM C2280F (For front side marker, rear parking, reverse lamps assembly parking and license plate lamps).
  • Ignition ON.

Do the parking lamps continue to illuminate?
Yes REPAIR the affected circuit.
No GO to C20

C3 CHECK THE INOPERATIVE PARKING LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect For a front side marker lamp, inoperative LH Headlamp C1284 or RH Headlamp C1285 .
  • Disconnect For a rear parking lamp, inoperative LH Rear Lamp C423 or RH Rear Lamp C422 .
  • Disconnect For a reversing lamp assembly parking lamp, inoperative LH Reversing Lamp C451 or RH Reversing Lamp C461 .
  • Disconnect For the license plate lamps, License Plate Lamp C4046 .
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • For a front side marker lamp, measure:
    Click to display connectors

      LH Front Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-1   Ground

    Click to display connectors

      RH Front Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-1   Ground
  • For a rear parking lamp, measure:
    Click to display connectors

      LH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   Ground

    Click to display connectors

      RH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   Ground
  • For a reversing lamp assembly parking lamp, measure:
    Click to display connectors

      LH Reversing Lamp Assembly Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C451-3   Ground

    Click to display connectors

      RH Reversing Lamp Assembly Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C461-3   Ground
  • For license plate lamps, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4046-1   Ground

Is the voltage greater than 11 volts?
Yes For a front side marker lamp, GO to C19
For a rear parking lamp, reversing lamp assembly parking lamp or license plate lamps, GO to C4
No REPAIR the circuit.

C4 CHECK THE INOPERATIVE PARKING LAMP GROUND CIRCUIT
  • For a rear parking lamp, measure:
    Click to display connectors

      LH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   C423-4

    Click to display connectors

      RH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   C422-4
  • For a reversing lamp assembly parking lamp, measure:
    Click to display connectors

      LH Reversing Lamp Assembly Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C451-3   C451-4

    Click to display connectors

      RH Reversing Lamp Assembly Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C461-3   C461-4
  • For license plate lamps, measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4046-1   C4046-3

Is the voltage greater than 11 volts?
Yes For a rear parking lamp, INSTALL a new rear lamp assembly,
REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation). For a reversing lamp assembly parking lamp, INSTALL a new reversing lamp,
REFER to: Reversing Lamp (417-01 Exterior Lighting, Removal and Installation). For license plate lamps, INSTALL a new license plate lamp,
REFER to: License Plate Lamp (417-01 Exterior Lighting, Removal and Installation).
No REPAIR the circuit.

C5 CHECK FOR VOLTAGE TO THE LED (LIGHT EMITTING DIODE) DRL (DAYTIME RUNNING LAMPS) /FRONT PARKING LAMP OR REAR SIDE MARKER LAMP
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect For a LED DRL /front parking lamp, inoperative LH Headlamp C1284 or RH Headlamp C1285 .
  • Disconnect For a rear side marker lamp, inoperative LH Rear Lamp C423 or RH Rear Lamp C422 .
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • For a LED DRL /front parking lamp, measure:
    Click to display connectors

      LH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-1   Ground

    Click to display connectors

      RH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-1   Ground
  • For a rear side marker lamp, measure:
    Click to display connectors

      LH Rear Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-6   Ground

    Click to display connectors

      RH Rear Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-6   Ground

Is the voltage greater than 11 volts?
Yes GO to C7
No GO to C6

C6 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE LED (LIGHT EMITTING DIODE) DRL (DAYTIME RUNNING LAMPS) /FRONT PARKING LAMP OR REAR SIDE MARKER LAMP
  • Place the headlamp switch in the OFF position.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • For a LED DRL /front parking lamp, measure:
    Click to display connectors

      LH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-1   Ground

    Click to display connectors

      RH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-1   Ground
  • For a rear side marker lamp, measure:
    Click to display connectors

      LH Rear Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-6   Ground

    Click to display connectors

      RH Rear Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-6   Ground

Is the voltage greater than 11 volts?
Yes For a LED DRL /front parking lamp, GO to C19
For a rear side marker lamp, INSTALL a new rear side marker lamp bulb.
REFER to: Rear Lamp Bulb (417-01 Exterior Lighting, Removal and Installation).
No GO to C8

C7 CHECK THE LED (LIGHT EMITTING DIODE) DRL (DAYTIME RUNNING LAMPS) /FRONT PARKING LAMP OR REAR SIDE MARKER LAMP GROUND CIRCUIT FOR AN OPEN
  • For a LED DRL /front parking lamp, measure:
    Click to display connectors

      LH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-1   C1284-8

    Click to display connectors

      RH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-1   C1285-8
  • For a rear side marker lamp, measure:
    Click to display connectors

      LH Rear Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-6   C423-4

    Click to display connectors

      RH Rear Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-6   C422-4

Does the voltage greater than 11 volts?
Yes For a LED DRL /front parking lamp, GO to C19
For a rear side marker lamp, INSTALL a new rear side marker lamp bulb.
REFER to: Rear Lamp Bulb (417-01 Exterior Lighting, Removal and Installation).
No REPAIR the circuit in question.

C8 CHECK THE LED (LIGHT EMITTING DIODE) DRL (DAYTIME RUNNING LAMPS) /FRONT PARKING LAMP OR REAR SIDE MARKER LAMP SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect BCM C2280E .
  • For a LED DRL /front parking lamp, measure:
    Click to display connectors

      LH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-5   C2280E-8

    Click to display connectors

      RH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-5   C2280E-9
  • For a rear side marker lamp, measure:
    Click to display connectors

      LH Rear Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-6   C2280E-14

    Click to display connectors

      RH Rear Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-6   C2280E-28

Is the resistance less than 3 ohms?
Yes GO to C9
No REPAIR the circuit.

C9 CHECK THE LED (LIGHT EMITTING DIODE) DRL (DAYTIME RUNNING LAMPS) /FRONT PARKING LAMP OR REAR SIDE MARKER LAMP SUPPLY CIRCUIT FOR A SHORT TO GROUND
  • For a LED DRL /front parking lamp, measure:
    Click to display connectors

      LH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-5   Ground

    Click to display connectors

      RH LED DRL /Front Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-5   Ground
  • For a rear side marker lamp, measure:
    Click to display connectors

      LH Rear Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-6   Ground

    Click to display connectors

      RH Rear Side Marker Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-6   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to C20
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

C10 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT SIDE MARKER AND LICENSE PLATE LAMPS WITH LH (LEFT-HAND) HEADLAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect LH Headlamp C1284 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1284-1   Ground

Is the voltage greater than 11 volts?
Yes DIAGNOSE for the LH LED control module, GO to C19
No GO to C11

C11 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT SIDE MARKER AND LICENSE PLATE LAMPS WITH RH (RIGHT-HAND) HEADLAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect RH Headlamp C1285 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1284-1   Ground

Is the voltage greater than 11 volts?
Yes DIAGNOSE for the LH LED control module, GO to C19
No GO to C12

C12 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT SIDE MARKER AND LICENSE PLATE LAMPS WITH LICENSE PLATE LAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect License Plate Lamp C4046 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1284-1   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new license plate lamp.
REFER to: License Plate Lamp (417-01 Exterior Lighting, Removal and Installation).
No GO to C13

C13 CHECK THE FRONT SIDE MARKER AND LICENSE PLATE LAMPS SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect BCM C2280F .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1284-1   C2280F-52

Is the resistance less than 3 ohms?
Yes GO to C14
No REPAIR the circuit in question.

C14 CHECK VOLTAGE CIRCUIT TO THE FRONT SIDE MARKER AND LICENSE PLATE LAMPS FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1284-1   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to C20
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

C15 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS WITH THE REAR LAMP DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect Inoperative LH Rear Lamp C423 or RH Rear Lamp C422 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   Ground

    Click to display connectors

      RH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new rear lamp assembly,
REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to C16

C16 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS WITH REVERSING LAMP ASSEMBLY DISCONNECTED
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect Inoperative LH Reversing Lamp C451 or RH Reversing Lamp C461 .
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   Ground

    Click to display connectors

      RH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new reversing lamp.
REFER to: Reversing Lamp (417-01 Exterior Lighting, Removal and Installation).
No GO to C17

C17 CHECK THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect BCM C2280F .
  • Measure:
    Click to display connectors

      LH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   C2280F-53

    Click to display connectors

      RH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   C2280F-48

Is the resistance less than 3 ohms?
Yes GO to C18
No REPAIR the circuit in question.

C18 CHECK VOLTAGE CIRCUIT TO THE REAR LAMP AND REVERSING LAMP ASSEMBLY PARKING LAMPS FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors

      LH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-3   Ground

    Click to display connectors

      RH Rear Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-3   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to C20
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

C19 CHECK THE LED (LIGHT EMITTING DIODE) CONTROL MODULE
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect Inoperative LH Headlamp C1284 or RH Headlamp C1285 .
  • Ignition ON.
  • CLEAR the Diagnostic Trouble Codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. REPEAT the self-test.
  • Activate the hazard flasher lamp function.
  • Operate the system and determine if the concern is still present.

Is the concern still present or does any Diagnostic Trouble Codes (DTCs) return?
Yes REMOVE the known good LED control module. INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No REMOVE the known good LED control module. INSTALL a new LED control module.

C20 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.


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