Ford Escape Manuals
Ford Escape 2020-2024 Service Manual / Electrical / Lighting / Exterior Lighting / Diagnosis and Testing - Turn Signal and Hazard Lamps

Ford Escape: Exterior Lighting / Diagnosis and Testing - Turn Signal and Hazard 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 B123A:11 Left Front Turn Indicator: Circuit Short To Ground   GO to Pinpoint Test B
  BCM B123A:15 Left Front Turn Indicator: Circuit Short To Battery Or Open   GO to Pinpoint Test B
  BCM B123B:11 Right Front Turn Indicator: Circuit Short To Ground   GO to Pinpoint Test B
  BCM B123B:15 Right Front Turn Indicator: Circuit Short To Battery Or Open   GO to Pinpoint Test B
  BCM B1247:11 Left Rear Turn Indicator: Circuit Short To Ground   GO to Pinpoint Test B
  BCM B1247:15 Left Rear Turn Indicator: Circuit Short To Battery or Open   GO to Pinpoint Test B
  BCM B1248:11 Right Rear Turn Indicator: Circuit Short To Ground   GO to Pinpoint Test B
  BCM B1248:15 Right Rear Turn Indicator: Circuit Short To Battery or Open   GO to Pinpoint Test B
  BCM B1497:01 Left Front Turn Lamp Feedback: General Electrical Failure   GO to Pinpoint Test D
  BCM B1498:01 Right Front Turn Lamp Feedback: General Electrical Failure   GO to Pinpoint Test D
  BCM B1D35:11 Hazard Switch: Circuit Short to Ground   GO to Pinpoint Test C
  DDM B1D06:11 Left Rear Turn Indicator: Circuit Short To Ground   GO to Pinpoint Test B
  PDM B1D07:11 Right Rear Turn Indicator: Circuit Short To Ground   GO to Pinpoint Test B
  SCCM B124C:96 Turn Indicator Stalk Switch Pack: Component Internal Failure   GO to Pinpoint Test E
  SCCM B124C:9E Turn Indicator Stalk Switch Pack: Stuck On   GO to Pinpoint Test E

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 > Turn Signal > Inoperative GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Turn Signal > Inoperative GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Turn Signal > Inoperative GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > Turn Signal > Inoperative GO to Pinpoint Test D
Lighting/Glass/Vision > Exterior Lighting > Turn Signal > Stays On GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Turn Signal > Stays On GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Turn Signal > Stays On GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > Turn Signal > Stays On GO to Pinpoint Test D

Symptom Charts

Symptom Chart: Turn Signal and Hazard 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).
The turn signal function is inoperative or always on   GO to Pinpoint Test A
One turn signal lamp is inoperative or always on   GO to Pinpoint Test B
The hazard lamp function is inoperative or always on   GO to Pinpoint Test C
The turn signal lamps and indicator flashes fast when no turn signal lamps are inoperative or does not flash fast when a turn signal lamp is inoperative   GO to Pinpoint Test D

Pinpoint Tests


PINPOINT TEST A: THE TURN SIGNAL FUNCTION IS INOPERATIVE OR ALWAYS ON

Refer to Wiring Diagrams Cell 90 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).

Possible Sources

  • LH steering column multifunction switch
  • SCCM
  • BCM
A1 CHECK THE SCCM (STEERING COLUMN CONTROL MODULE) TURN SIGNAL PARAMETER IDENTIFICATIONS (PIDS)
  • Ignition ON.
  • Using a diagnostic scan tool, view SCCM Parameter Identifications (PIDs) below while placing the LH steering column multifunction switch in the left and right turn positions.

    • Access the  SCCM  and monitor the  TRN_SIG_SW_L  PID

    • Access the  SCCM  and monitor the  TRN_SIG_SW_R  PID


Do the Parameter Identifications (PIDs) match the LH steering column multifunction switch position?
Yes GO to A2
No INSTALL a new LH steering column multifunction switch.
REFER to: Steering Column Multifunction Switch LH (211-05 Steering Wheel and Column Electrical Components, Removal and Installation).
TEST the system for normal operation. If the concern is still present, GO to A3

A2 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.

A3 CHECK FOR CORRECT SCCM (STEERING COLUMN CONTROL MODULE) OPERATION
  • Disconnect and inspect all SCCM 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 SCCM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new SCCM .
REFER to: Steering Column Control Module (SCCM) (211-05 Steering Wheel and Column Electrical Components, 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 TURN SIGNAL LAMP IS INOPERATIVE OR ALWAYS ON

Refer to Wiring Diagrams Cell 90 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 B123A:11 Left Front Turn Indicator: 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 turn lamp voltage supply circuit.
BCM B123A:15 Left Front Turn Indicator: 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 turn lamp voltage supply circuit.
BCM B123B:11 Right Front Turn Indicator: 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 turn lamp voltage supply circuit.
BCM B123B:15 Right Front Turn Indicator: 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 turn lamp voltage supply circuit.
BCM B1247:11 Left Rear Turn Indicator: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH rear turn lamp voltage supply circuit.
BCM B1247:15 Left Rear Turn Indicator: 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 turn lamp voltage supply circuit.
BCM B1248:11 Right Rear Turn Indicator: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH rear turn lamp voltage supply circuit.
BCM B1248:15 Right Rear Turn Indicator: 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 turn lamp voltage supply circuit.
DDM B1D06:11 Left Turn Indicator: Circuit Short To Ground A continuous memory DTC that sets when the DDM detects an open or short to voltage from the exterior mirror turn lamp voltage supply circuit.
PDM B1D07:11 Right Turn Indicator: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the PDM detects an open or short to voltage from the exterior mirror turn lamp voltage supply circuit

Possible Sources

  • Bulb
  • Headlamp assembly
  • Rear lamp assembly
  • Exterior mirror
  • Wiring, terminals or connectors
  • DDM
  • PDM
  • BCM
B1 DETERMINE IF ANY TURN LAMP IS ALWAYS ON
  • Ignition ON.
  • Activate the hazard lamp function.
  • Observe the front and the rear turn lamps.

Is any turn lamp continuously illuminated (not flashing)?
Yes For a front or mirror turn lamp, GO to B2
For rear lamps, GO to B3
No For a front turn lamp, GO to B4
For rear turn lamps, GO to B10
For a mirror turn lamp, GO to B15

B2 CHECK THE FRONT TURN LAMP OR EXTERIOR MIRROR TURN VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Deactivate the hazard lamp function.
  • Disconnect BCM C2280E (Front Lamps).
  • Disconnect DDM C501B (LH exterior mirror lamp).
  • Disconnect PDM C652B ( RH exterior mirror lamp).
  • Ignition ON.

Does the turn lamp in question continue to illuminate?
Yes REPAIR the affected circuit.
No For the LH exterior mirror turn lamp, GO to B20
For the RH exterior mirror turn lamp, GO to B21
For all other turn lamps, GO to B19

B3 CHECK THE REAR TURN LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Deactivate the hazard lamp function.
  • Disconnect BCM C2280F .
  • Ignition ON.

Does the turn lamp in question continue to illuminate?
Yes REPAIR the affected circuit.
No GO to B19

B4 CHECK FOR VOLTAGE TO THE FRONT TURN LAMP
  • Ignition OFF.
  • Deactivate the hazard lamp function.
  • Disconnect For halogen headlamps, inoperative LH Headlamp C1021 or RH Headlamp C1041 .
  • Disconnect For LED headlamps, inoperative LH Headlamp C1284 or RH Headlamp C1285 .
  • Ignition ON.
  • Activate the hazard flasher lamp function.
  • For halogen headlamps, measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-2   Ground

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-2   Ground
  • For LED headlamps, measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-2   Ground

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-2   Ground

Does the voltage alternate from 0 to greater than 11 volts?
Yes GO to B6
No GO to B5

B5 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FRONT TURN LAMP
  • Deactivate the hazard lamp function.
  • 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).
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Ignition ON.
  • Activate the hazard flasher lamp function.
  • For halogen headlamps, measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-2   Ground

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-2   Ground
  • For LED headlamps, measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-2   Ground

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-2   Ground

Does the voltage alternate from 0 to greater than 11 volts?
Yes For high series headlamps, GO to B7
No GO to B8

B6 CHECK THE TURN LAMP GROUND CIRCUIT FOR AN OPEN
  • For halogen headlamps, measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-2   C1021-7
      C1021-2   C1021-8
      C1021-2   C1021-9

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-2   C1041-7
      C1041-2   C1041-8
      C1041-2   C1041-9
  • For LED headlamps, measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-2   C1284-8

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-2   C1285-8

Does the voltage alternate from 0 to greater than 11 volts?
Yes For high series headlamps, GO to B7
No REPAIR the circuit in question.

B7 CHECK THE LED (LIGHT EMITTING DIODE) CONTROL MODULE
  • Deactivate the hazard lamp function.
  • Ignition OFF.
  • Connect Inoperative LH Headlamp C1284 or RH Headlamp C1285 .
  • Substitute the known good LED control module from the opposite headlamp.
  • 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.

B8 CHECK THE FRONT TURN LAMP SUPPLY CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Deactivate the hazard flasher lamp function.
  • Disconnect BCM C2280E .
  • For halogen headlamps, measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-2   Ground

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-2   Ground
  • For LED headlamps, measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-2   Ground

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to B9
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If any BCM Diagnostic Trouble Codes (DTCs) other than DTC U3000:49 are present, CLEAR the Diagnostic Trouble Codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. TEST the system for normal operation.
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

B9 CHECK THE FRONT TURN LAMP SUPPLY CIRCUIT FOR AN OPEN
  • For halogen headlamps, measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1021-2   C2280E-3

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1041-2   C2280E-2
  • For LED headlamps, measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-2   C2280E-3

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-2   C2280E-2

Is the resistance less than 3 ohms?
Yes GO to B19
No REPAIR the circuit.

B10 CHECK FOR REAR TURN LAMP SUPPLY VOLTAGE
  • Ignition OFF.
  • Deactivate the hazard flasher lamp function.
  • Disconnect LH Rear Lamp C423 or RH Rear Lamp C422 .
  • Ignition ON.
  • Activate the hazard flasher lamp function.
  • Measure:
    Click to display connectors

      LH Rear Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-1   Ground

    Click to display connectors

      RH Rear Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-1   Ground

Does the voltage alternate from 0 to greater than 11 volts?
Yes GO to B12
No GO to B11

B11 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE REAR TURN LAMP
  • Deactivate the hazard flasher lamp function.
  • 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.
  • Activate the hazard flasher lamp function.
  • Measure:
    Click to display connectors

      LH Rear Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-1   Ground

    Click to display connectors

      RH Rear Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-1   Ground

Does the voltage alternate from 0 to greater than 11 volts?
Yes INSTALL a new rear turn bulb.
No GO to B13

B12 CHECK THE REAR TURN LAMP GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors

      LH Rear Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-1   C423-5

    Click to display connectors

      RH Rear Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-1   C422-5

Does the voltage alternate from 0 to greater than 11 volts?
Yes INSTALL a new rear turn bulb.
No REPAIR the circuit.

B13 CHECK THE REAR TURN LAMP SUPPLY CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Deactivate the hazard flasher lamp function.
  • Disconnect BCM C2280F .
  • Measure:
    Click to display connectors

      LH Rear Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-1   C2280F-6

    Click to display connectors

      RH Rear Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-1   C2280F-65

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

B14 CHECK THE REAR TURN LAMP SUPPLY CIRCUIT FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors

      LH Rear Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C423-1   Ground

    Click to display connectors

      RH Rear Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C422-1   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to B19
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If any BCM Diagnostic Trouble Codes (DTCs) other than DTC U3000:49 are present, CLEAR the Diagnostic Trouble Codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. TEST the system for normal operation.
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 CHECK FOR VOLTAGE TO THE EXTERIOR MIRROR
  • Ignition OFF.
  • Deactivate the hazard flasher lamp function.
  • Disconnect Inoperative, LH Exterior Mirror C521 or RH Exterior Mirror C601 .
  • Ignition ON.
  • Activate the hazard flasher lamp function.
  • Measure:
    Click to display connectors

      LH Exterior Mirror Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C521-2   Ground

    Click to display connectors

      RH Exterior Mirror Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C601-2   Ground

Does the voltage alternate from 0 to greater than 11 volts?
Yes GO to B16
No GO to B17

B16 CHECK THE EXTERIOR MIRROR TURN LAMP GROUND
  • Measure:
    Click to display connectors

      LH Exterior Mirror Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C521-2   C521-16

    Click to display connectors

      RH Exterior Mirror Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C601-2   C601-16

Does the voltage alternate from 0 to greater than 11 volts?
Yes CHECK the exterior mirror jumper harness between the vehicle harness and the parking lamp for open circuits and damaged or pushed-out pins. If the jumper harness is OK, INSTALL a new exterior mirror turn lamp. If the harness cannot be repaired, INSTALL a new exterior mirror turn lamp.
REFER to: Exterior Mirror (501-09 Rear View Mirrors, Removal and Installation).
No REPAIR the circuit.

B17 CHECK THE EXTERIOR MIRROR TURN LAMP SUPPLY CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Deactivate the hazard flasher lamp function.
  • Disconnect DDM C501B (LH exterior mirror lamp).
  • Disconnect PDM C652B (RH exterior mirror lamp).
  • Measure:
    Click to display connectors

      LH Exterior Mirror Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C521-2   Ground

    Click to display connectors

      RH Exterior Mirror Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C601-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to B18
No REPAIR the circuit.

B18 CHECK THE MIRROR TURN LAMP SUPPLY CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors

      LH Exterior Mirror Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C521-2   C501B-4

    Click to display connectors

      RH Exterior Mirror Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C601-2   C652B-4

Is the resistance less than 3 ohms?
Yes For the LH exterior mirror turn lamp, GO to B20
For the RH exterior mirror turn lamp, GO to B21
No REPAIR the circuit.

B19 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) 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.

B20 CHECK FOR CORRECT DDM (DRIVER DOOR MODULE) OPERATION
  • Disconnect and inspect all DDM 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 DDM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new DDM .
REFER to: Driver Door Module (DDM) (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.

B21 CHECK FOR CORRECT PDM (PASSENGER DOOR MODULE) OPERATION
  • Disconnect and inspect all PDM 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 PDM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PDM .
REFER to: Passenger Door Module (PDM) (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: THE HAZARD LAMP FUNCTION IS INOPERATIVE OR ALWAYS ON

Refer to Wiring Diagrams Cell 90 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 B1D35:11 Hazard Switch: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the hazard lamp function input circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Hazard flasher switch
  • BCM
C1 CHECK FOR BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, perform the BCM self-test.

Is DTC B1D35:11 present?
Yes GO to C2
No GO to C4

C2 ISOLATE THE HAZARD FLASHER SWITCH
  • Ignition OFF.
  • Disconnect Hazard Flasher Switch C2480 .
  • Ignition ON.
  • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the BCM self-test.

Is DTC B1D35:11 retrieved again?
Yes GO to C3
No INSTALL a new hazard flasher switch.
REFER to: Hazard Flasher Switch (417-01 Exterior Lighting, Removal and Installation).

C3 CHECK THE HAZARD FLASHER SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect BCM C2280D .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2480-4   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to C6
No REPAIR the circuit.

C4 CHECK FOR A VOLTAGE SIGNAL TO THE HAZARD FLASHER SWITCH
  • Ignition OFF.
  • Disconnect Hazard Flasher Switch C2480 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2480-4   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new hazard flasher switch.
REFER to: Hazard Flasher Switch (417-01 Exterior Lighting, Removal and Installation).
No GO to C5

C5 CHECK THE HAZARD FLASHER SWITCH INPUT CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect BCM C2280D .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2480-4   C2280D-12

Is the resistance less than 3 ohms?
Yes GO to C6
No REPAIR the circuit.

C6 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 D: THE TURN SIGNAL INDICATOR FLASHES FAST WHEN NO TURN SIGNAL LAMPS ARE INOPERATIVE OR DOES NOT FLASH FAST WHEN A TURN SIGNAL LAMP IS INOPERATIVE

Refer to Wiring Diagrams Cell 90 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 B1497:01 Left Front Turn Lamp Feedback: General Electrical Failure A continuous memory DTC that sets when the BCM detects an electrical failure from the LH front turn lamp outage circuit when the turn lamp is activated.
BCM B1498:01 Right Front Turn Lamp Feedback: General Electrical Failure A continuous memory DTC that sets when the BCM detects an electrical failure from the RH front turn lamp outage circuit when the turn lamp is activated.

Possible Sources

  • Wiring, terminals or connectors
  • BCM
D1 DETERMINE IF THE VEHICLE IS EQUIPPED WITH A TRM (TRAILER MODULE)
  • Using a diagnostic scan tool, perform a network test.

Does the test indicate the presence of a TRM and pass the network test?
Yes GO to D2
No If a TRM is present and did not pass the network test, DIAGNOSE no communication with the TRM .
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing). If a TRM is not present, GO to D4

D2 CHECK THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE BCM (BODY CONTROL MODULE) AND TRM (TRAILER MODULE) SELF-TEST
  • Using a diagnostic scan tool, perform the BCM , and TRM self-test.

Are any communication Diagnostic Trouble Codes (DTCs) present?
Yes DIAGNOSE the communication Diagnostic Trouble Codes (DTCs) first.
For BCM Diagnostic Trouble Codes (DTCs),
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing). For TRM Diagnostic Trouble Codes (DTCs),
REFER to: Trailer Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
No Check if Light Emitting Diodes (LEDs) are installed in place of the rear incandescent bulbs. If Light Emitting Diodes (LEDs) are installed, CONFIGURE (programmable parameters) the turn lamp outage configuration off. TEST the system for normal operation. If the turn lamps still fast flash or Light Emitting Diodes (LEDs) are not installed in place of the rear incandescent bulbs GO to D3

D3 ISOLATE THE TRM (TRAILER MODULE)
  • Ignition OFF.
  • Disconnect TRM C425A .
  • Disconnect TRM C425B .
  • Disconnect TRM C425C .
  • Ignition ON.
  • Activate the suspect turn lamps.

Do the turn lamps operate correctly?
Yes GO to D10
No For rear turn lamps, GO to D11
For front turn lamps, GO to D4

D4 DETERMINE IF A TURN LAMP IS INOPERATIVE
  • Ignition ON.
  • While observing the front turn lamps, place the LH steering column multifunction switch in the left and right turn positions.

Is any turn lamp inoperative?
Yes GO to D5
No For front turn lamps with halogen headlamps or rear turn lamps, GO to D11
For fron turn lamps with LED headlamps, GO to D7

D5 CHECK THE TURN LAMP
  • Ignition OFF.
  • Deactivate the hazard lamp function.
  • Disconnect For halogen headlamps, for inoperative front turn lamp, LH Headlamp C1021 or RH Headlamp C1041 .
  • Disconnect For LED headlamps, for inoperative front turn lamp, LH Headlamp C1284 or RH Headlamp C1285 .
  • Disconnect For inoperative LH rear turn lamp, LH Rear Lamp C423 or RH Rear Lamp C422 .
  • Ignition ON.
  • While observing the front turn lamps, place the LH steering column multifunction switch in the inoperative turn position.

Does the turn signal indicator flash fast?
Yes For halogen headlamps and inoperative front turn lamp, INSTALL a new turn lamp bulb.
REFER to: Front Turn Signal Lamp Bulb (417-01 Exterior Lighting, Removal and Installation). For LED headlamps and inoperative front turn lamp, GO to D9
For rear turn lamp, INSTALL a new turn lamp bulb.
REFER to: Rear Lamp Bulb (417-01 Exterior Lighting, Removal and Installation).
No For halogen headlamps or rear lamps, GO to D11
For LED headlamps, GO to D6

D6 CHECK THE FRONT TURN LAMP OUTAGE CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect BCM C2280E .
  • Ignition ON.
  • Measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-12   Ground

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-12   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to D11

D7 CHECK THE FRONT TURN LAMP OUTAGE CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Deactivate the hazard lamp function.
  • Disconnect Inoperative LH Headlamp C1284 or RH Headlamp C1285 .
  • Disconnect BCM C2280E .
  • Measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-12   Ground

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-12   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to D8
No REPAIR the circuit.

D8 CHECK THE FRONT TURN LAMP OUTAGE CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors

      LH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1284-12   C2280E-30

    Click to display connectors

      RH Turn Lamp


    Positive Lead Measurement / Action Negative Lead
      C1285-12   C2280E-31

Is the resistance less than 3 ohms?
Yes GO to D9
No REPAIR the circuit.

D9 CHECK THE LED (LIGHT EMITTING DIODE) CONTROL MODULE
  • Deactivate the hazard lamp function.
  • Ignition OFF.
  • Connect Inoperative LH Headlamp C1284 or RH Headlamp C1285 .
  • Substitute the known good LED control module from the opposite headlamp.
  • 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. GO to D11
No REMOVE the known good LED control module. INSTALL a new LED control module.

D10 CHECK FOR CORRECT TRM (TRAILER MODULE) OPERATION
  • Disconnect and inspect all TRM and all related in-line 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 TRM and all related in-line 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 TRM .
REFER to: Trailer Module (TRM) (417-01 Exterior Lighting, 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.

D11 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM and all related in-line 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 and all related in-line 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 E: B124C:96, B124C:9E

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
SCCM B124C:96 Turn Indicator Stalk Switch Pack: Component Internal Failure A continuous memory and on-demand DTC that sets when the SCCM detects an internal failure from the LH steering column multifunction switch.
SCCM B124C:9E Turn Indicator Stalk Switch Pack: Stuck On A continuous memory and on-demand DTC that sets when the SCCM detects that the LH steering column multifunction switch has been in a switched position for at least 2 minutes.

Possible Sources

  • Wiring, terminals or connectors
  • LH steering column multifunction switch
  • SCCM
E1 CHECK THE LH (LEFT-HAND) STEERING COLUMN MULTIFUNCTION SWITCH
  • INSTALL a new LH steering column multifunction switch.
    REFER to: Steering Column Multifunction Switch LH (211-05 Steering Wheel and Column Electrical Components, Removal and Installation).
  • Ignition ON.
  • Using a diagnostic scan tool, perform the SCCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test.
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, perform the SCCM self-test.

Does SCCM DTC B124C:96, B124C:9E or the condition return?
Yes GO to E2
No The system is operating correctly. The concern was caused by the LH steering column multifunction switch.

E2 CHECK FOR CORRECT SCCM (STEERING COLUMN CONTROL MODULE) OPERATION
  • Disconnect and inspect all SCCM 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 SCCM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new SCCM .
REFER to: Steering Column Control Module (SCCM) (211-05 Steering Wheel and Column Electrical Components, 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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