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PINPOINT TEST AD : All The Stoplamps Are Inoperative

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

  1. AD1 CHECK THE BPP SWITCH VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

    • Ignition OFF.
    • Disconnect: BPP Switch C278 .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C278-1
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  AD2
    No  VERIFY the BJB fuse 43 (5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

  2. AD2 BYPASS THE BPP SWITCH

    NOTE: If the fuse in the jumper wire fails, refer to the OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

    • Ignition ON.
    • Connect a fused jumper wire:
      Positive Lead Measurement / Action Negative Lead
      C278-1
      GFD135987Courtesy of FORD MOTOR COMPANY
      		 C278-4

    Do the stoplamps illuminate? 

    Yes  REMOVE the jumper wire. INSTALL a new BPP switch. REFER to Stoplamp Switch .
    No  LEAVE the jumper wire connected. GO to  AD3

  3. AD3 CHECK THE BPP SWITCH INPUT CIRCUIT TO THE BCM FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-28
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  REMOVE the jumper wire.For Expedition, GO to  AD5For Navigator, VERIFY the BCM fuse 15 (15A) is OK. If OK, GO to  AD4
    No  REMOVE the jumper wire. REPAIR the circuit.

  4. AD4 BYPASS THE BCM

    NOTE: If the fuse in the jumper wire fails, refer to the OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

    • Connect a fused jumper wire:
      Positive Lead Measurement / Action Negative Lead
      C2280D-14
      GFD135987Courtesy of FORD MOTOR COMPANY
      		 Positive Battery Terminal
      GFD135809Courtesy of FORD MOTOR COMPANY

    Do the stoplamps illuminate? 

    Yes  REMOVE the jumper wire. GO to  AD5
    No  REMOVE the jumper wire. REPAIR the BCM stoplamp output circuit for an open.

  5. AD5 CHECK FOR CORRECT BCM 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, Refer to BCM Hardware Testing ..
    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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