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Pinpoint Test C : No Power In Run (Vehicles With A Conventional Ignition Switch)

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The following Pinpoint Test uses a test lamp to simulate normal circuit loads. Use only a Rotunda Test Lamp (SGT27000) or 250- 300mA incandescent bulb test lamp. To avoid connector terminal damage, use the Rotunda Flex Probe kit for the test lamp probe connection to the vehicle. Do not use the test lamp probe directly on any connector.

  1. C1 CHECK FOR NETWORK CONCERNS

    • Ignition ON.
    • Using a diagnostic scan tool, carry out the network test.

    Do the modules installed on the vehicle pass the network test? 

    Yes  REFER to Module Communications Network .
    No  GO to  C2.

  2. C2 CHECK FOR BCM DTC B1142:29

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

    Is DTC B1142:29 present? 

    Yes  GO to Pinpoint Test I .
    No  GO to  C3.

  3. C3 CHECK THE IGNITION RUN-START INPUT CIRCUIT (IGN_R/S_INPT) PID

    • Using a diagnostic scan tool, view the BCM PIDs.
    • Using a diagnostic scan tool, monitor the BCM IGN_R/S_INPT PID.

    Does the PID indicate the ignition switch is in the RUN position? 

    Yes  GO to  C6.
    No  GO to  C4.

  4. C4 CHECK FOR VOLTAGE TO THE BCM

    • Ignition OFF.
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-29
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  C14.
    No  GO to  C5.

  5. C5 CHECK THE IGNITION RUN-DESIGNATED INPUT CIRCUIT FOR AN OPEN

    • Ignition OFF.
    • Disconnect: Ignition Switch C250 .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-29
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C250-1

    Is the resistance less than 3 ohms? 

    Yes  INSTALL a new ignition switch. REFER to Ignition Switch .
    No  REPAIR the circuit.

  6. C6 CHECK THE RUN/START RELAY

    • Ignition OFF.
    • Disconnect: RUN/START Relay.
    • Substitute a known good relay.
    • Ignition ON.
    • Check the operation of the front blower motor.

    Does the front blower motor operate? 

    Yes  REMOVE the known good relay. INSTALL a new RUN/START relay.
    No  REMOVE the known good relay. GO to  C7.

  7. C7 CHECK THE RUN/START RELAY COIL VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      RUN/START relay, cavity 1
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  C8.
    No  VERIFY BJB fuse 42 (5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM Electrical Wiring Diagram Introduction to identify the possible cause of the circuit short.

  8. C8 CHECK THE RUN/START RELAY BATTERY SUPPLY CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      RUN/START relay, cavity 3
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  C9.
    No  VERIFY BJB fuse 12 (40A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM Electrical Wiring Diagram Introduction to identify the possible cause of the circuit short.

  9. C9 CHECK THE BCM RUN/START RELAY CONTROL FOR A SHORT

    • Connect:
      Lead 1 Measurement / Action Lead 2
      RUN/START relay, cavity 1
      GFD134887Courtesy of FORD MOTOR COMPANY
      		 RUN/START relay, cavity 2

    Does the test lamp illuminate? 

    Yes  GO to  C10.
    No  GO to  C11.

  10. C10 CHECK THE BCM RUN/START RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND

    • Connect:
      Lead 1 Measurement / Action Lead 2
      RUN/START relay, cavity 1
      GFD134887Courtesy of FORD MOTOR COMPANY
      		 RUN/START relay, cavity 2

    Does the test lamp illuminate? 

    Yes  REPAIR the circuit.
    No  GO to  C14.

  11. C11 CHECK THE BCM RUN/START RELAY CONTROL OPERATION

    • Connect:
      Lead 1 Measurement / Action Lead 2
      RUN/START relay, cavity 1
      GFD134887Courtesy of FORD MOTOR COMPANY
      		 RUN/START relay, cavity 2
    • Ignition ON.

    Does the test lamp illuminate? 

    Yes  REPAIR the RUN/START relay output circuit for an open.
    No  GO to  C12.

  12. C12 CHECK THE BCM RUN/START RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      RUN/START relay, cavity 2
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
    • Ignition ON.

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  C13.

  13. C13 CHECK THE BCM RUN/START RELAY CONTROL CIRCUIT FOR AN OPEN

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      RUN/START relay, cavity 2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C2280F-18

    Is the resistance less than 3 ohms? 

    Yes  GO to  C14.
    No  REPAIR the circuit.

  14. C14 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, 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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