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Pinpoint Test A : All The STOPLAMPS Are Inoperative

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  1. A1 CHECK THE STOPLAMP SWITCH VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect: BPP (Stoplamp) Switch C278.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C278-1
      GFD410228Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  A2
    No  VERIFY the BCM fuse 9 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to OEM Wiring Diagrams to identify the possible causes of the circuit short.

  2. A2 BYPASS THE STOPLAMP SWITCH

    • Connect a fused jumper:
      Positive Lead Measurement / Action Negative Lead
      C278-1
      GFD410229Courtesy of FORD MOTOR COMPANY
      		 C278-4

    • Ignition ON.

    Do the stoplamps illuminate? 

    Yes  REMOVE the fused jumper wire. INSTALL a new stoplamp switch. REFER to: Stoplamp Switch .
    No  LEAVE the fused jumper wire connected. GO to  A3

  3. A3 CHECK THE STOPLAMP SWITCH INPUT CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect: BCM C2280A.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C278-1
      GFD410230Courtesy of FORD MOTOR COMPANY
      		 C2280A-1

    Is the resistance less than 3 ohms? 

    Yes  REMOVE the fused jumper wire. GO to  A4
    No  REMOVE the fused jumper wire. REPAIR the circuit

  4. A4 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, 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.
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