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Pinpoint Test H : The Ambient Lighting Is Inoperative Or Always On

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to INTERIOR LAMPS for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Interior Lighting - System Operation and Component Description .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    BCM B145C:11 Ambient Lighting Power Supply Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the ambient light module conditioned power supply output circuit.
    BCM B145C:15 Ambient Lighting Power Supply 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 ambient light module conditioned power supply output circuit.
    BCM B1465:00 Ambient Lighting Bus 1: No Sub Type Information A continuous memory DTC that sets when the BCM detects a fault on an ambient lighting LIN circuit.
    BCM B1467:00 Ambient Lighting Bus 3: No Sub Type Information A continuous memory DTC that sets when the BCM detects a fault on an ambient lighting LIN circuit.
    BCM U1000:00 Solid State Driver Protection Active -Driver Disabled: No Sub Type Information This DTC sets when the BCM has temporarily shut down the output driver. The module has temporarily disabled an output because an excessive current draw exists (such as a short to ground). The BCM cannot enable the output until the cause of the short is corrected, the Diagnostic Trouble Codes (DTCs) have been cleared and a successful self-test is run.
    BCM U3000:49 Control Module: Internal Electronic Failure This DTC sets when the BCM has permanently shut down the output driver. The module has permanently disabled an output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the BCM can withstand. CORRECT the cause of the excessive current draw before installing a new BCM.

    Possible Sources 

    • Wiring, terminals or connectors
    • FDIM
    • BCM

  2. H1 CHECK FOR BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition ON.

    • Using a diagnostic scan tool, perform the BCM self-test.

    Is DTC B1465:00, B1467:00, B145C:11 or B145C:15 present? 

    Yes  For DTC B1465:00, GO to  H2. For DTC B1467:00, GO to  H5. For DTC B145C:11, GO to  H8. For DTC B145C:15, GO to  H9
    No  GO to  H11

  3. H2 CHECK THE DOOR AND FRONT SEAT (REAR FOOTWELL) AMBIENT LIGHTING LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect BCM C2280C.

    • Disconnect BCM C2280E.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280E-38
      GFD465489Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  H3

  4. H3 CHECK THE DOOR AND FRONT SEAT (REAR FOOTWELL) AMBIENT LIGHTING LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect LH Front Door C573.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C573-1
      GFD465490Courtesy of FORD MOTOR COMPANY
      		 C2280E-38

    Is the resistance less than 3 ohms? 

    Yes  GO to  H4
    No  REPAIR the circuit.

  5. H4 CHECK THE DOOR AND FRONT SEAT (REAR FOOTWELL) AMBIENT LIGHTING LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND

    • Disconnect RH Front Door C649.

    • Disconnect. For SuperCrew, LH Rear Door C737.

    • Disconnect. For SuperCrew, RH Rear Door C837.

    • Disconnect. For SuperCrew, LH Front Seat Ambient Lighting Lamp (rear footwell) C3458.

    • Disconnect. For SuperCrew, RH Front Seat Ambient Lighting Lamp (rear footwell) C3457.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C573-1
      GFD465490Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  H11
    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, Refer to BCM Guided Routine .

  6. H5 CHECK THE AMBIENT LIGHTING LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect BCM C2280C.

    • Disconnect BCM C2280B.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-13
      GFD465489Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  H6

  7. H6 CHECK THE AMBIENT LIGHTING LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect LH Front Footwell Lamp C209.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-13
      GFD465490Courtesy of FORD MOTOR COMPANY
      		 C209-2

    Is the resistance less than 3 ohms? 

    Yes  GO to  H7
    No  REPAIR the circuit.

  8. H7 CHECK THE AMBIENT LIGHTING LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND

    • Disconnect RH Front Footwell Lamp C266.

    • Disconnect RH Instrument Panel Ambient Lamp C2476.

    • Disconnect Floor Console Cup Holder Ambient Lamp C3349.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-13
      GFD465490Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  H11
    No  REPAIR the circuit.

  9. H8 CHECK THE AMBIENT LIGHTING VOLTAGE CIRCUIT FOR A SHORT TO GROUND

    • Disconnect BCM C2280C.

    • Disconnect LH Front Door C573.

    • Disconnect RH Front Door C649.

    • Disconnect LH Rear Door C737 (SuperCrew only).

    • Disconnect RH Rear Door C837 (SuperCrew only).

    • Disconnect LH Front Footwell Lamp C209.

    • Disconnect RH Front Footwell Lamp C266.

    • Disconnect RH Instrument Panel Ambient Lamp C2476.

    • Disconnect Floor Console Cup Holder Ambient Lamp C3349.

    • Disconnect LH Front Seat (Rear Footwell) Lamp C3458.

    • Disconnect RH Front Seat (Rear Footwell) Lamp C3457.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280C-4
      GFD465490Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  H11
    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, Refer to BCM Guided Routine .

  10. H9 CHECK THE AMBIENT LIGHTING VOLTAGE CIRCUIT FOR AN OPEN

    • Disconnect BCM C2280C.

    • Disconnect LH Front Footwell Lamp C209.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280C-4
      GFD465490Courtesy of FORD MOTOR COMPANY
      		 C209-1

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  H10
    No  REPAIR the circuit.

  11. H10 CHECK THE AMBIENT LIGHTING VOLTAGE CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280C-4
      GFD465489Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  H11

  12. H11 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

    • Disconnect and inspect all BCM connectors and 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 connectors and 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 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, Refer to BCM Guided Routine .
    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. CLEAR the Diagnostic Trouble Codes (DTCs).
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