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Pinpoint Test B: The Low Beams Are Inoperative

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  1. B1 CHECK FOR VOLTAGE TO THE CJB 
    • Key in OFF position.
    • Disconnect: CJB C270g.
    • Place the headlamp switch in the headlamps ON position.
    • Measure the voltage the between the CJB C270g-4, circuit 13 (RD/BK), harness side and ground.
      Fig 1: Checking Voltage To CJB
      G04645529Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 

    Yes  : INSTALL a new CJB. TEST the system for normal operation.

    No  : If equipped with DRL, GO to B2.

    If not equipped with DRL, GO to  B5.

  2. B2 CHECK THE DRL RELAY 3 
    • Place the headlamp switch in the OFF position.
    • Disconnect: DRL Relay 3 C1000.
    • Carry out the DRL relay 3 component test. Refer to EXTERIOR LIGHTS for component testing.
    • Is the DRL relay 3 OK? 

    Yes  : GO to B3.

    No  : INSTALL a new DRL relay 3. TEST the system for normal operation.

  3. B3 CHECK THE VOLTAGE TO THE DRL RELAY 3 
    • Place the headlamp switch in the headlamps ON position.
    • Measure the voltage between the DRL relay 3 C1000-87a, circuit 1033 (RD/YE), harness side and ground.
      Fig 2: Checking Voltage To DRL Relay 3
      G04645530Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 

    Yes  : REPAIR circuit 13 (RD/BK) between the DRL relay 3 and the CJB. TEST the system for normal operation.

    No  : PLACE the headlamp switch in the OFF position. GO to B4.

  4. B4 CHECK CIRCUITS 13 (RD/BK) AND 1033 (RD/YE) FOR AN OPEN 
    • Disconnect: Multifunction Switch C202a.
    • Measure the resistance between the DRL relay 3 C1000-87a, circuit 1033 (RD/YE), harness side and the multifunction switch C202a-9, circuit 13 (RD/BK), harness side.
      Fig 3: Checking Circuits 13 (RD/BK) And 1033 (RD/YE) For Open
      G04645531Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes  : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.

    No  : REPAIR circuit 13 (RD/BK) or circuit 1033 (RD/YE) as necessary. TEST the system for normal operation.

  5. B5 CHECK CIRCUIT 13 (RD/BK) FOR AN OPEN 
    • Place the headlamp switch in the OFF position.
    • Disconnect: Multifunction Switch C202a.
    • Measure the resistance between the CJB C270g-4, circuit 13 (RD/BK), harness side and the multifunction switch C202a-9, circuit 13 (RD/BK), harness side.
      Fig 4: Checking Circuit 13 (RD/BK) For Open
      G04645532Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes  : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.

    No  : REPAIR the circuit. TEST the system for normal operation.

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