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Pinpoint Test C: The High Beams Are Inoperative

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. C1 CHECK THE HIGH BEAM INDICATOR 
    • Key in OFF position.
    • Place the headlamp switch in the ON position.
    • Place the multifunction switch in the high beam position.
    • Does the high beam indicator illuminate? 
    • Yes  : TURN the headlamp switch off. GO to C2.
    • No  : TURN the headlamp switch off. GO to  C3.
  2. C2 CHECK CIRCUIT 12 (LG/BK) FOR AN OPEN 
    • Disconnect: Central Junction Box (CJB) C270h.
    • Place the headlamp switch in the ON position.
    • Measure the voltage between CJB C270h-1, circuit 12 (LG/BK), component side and ground.
      Fig 1: Checking Circuit 12 (LG/BK) For Open
      G03910944Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : REPAIR the circuit. TEST the system for normal operation.
    • No  : INSTALL a new CJB. TEST the system for normal operation.
  3. C3 CHECK FOR VOLTAGE TO THE CENTRAL JUNCTION BOX (CJB) 
    • Disconnect: CJB C270b.
    • Place the headlamp switch in the ON position.
    • Measure the voltage between CJB C270b-7, circuit 632 (GY/OG), harness side and ground.
      Fig 2: Checking For Voltage To Central Junction Box (CJB)
      G03910945Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : INSTALL a new CJB. TEST the system for normal operation.
    • No  : TURN the headlamp switch off. GO to C4.
  4. C4 CHECK CIRCUIT 632 (GY/OG) FOR AN OPEN 
    • Disconnect: Multifunction Switch C202a.
    • Measure the resistance between CJB C270b-7, circuit 632 (GY/OG), harness side and multifunction switch C202a-7, circuit 632 (GY/OG), harness side.
      Fig 3: Checking Circuit 632 (GY/OG) For Open
      G03910946Courtesy 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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