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Home >> Ford >> 2005 >> Escape Hybrid, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 815 (Exterior Lighting System (F250-F550)) >> Diagnostic Tests >> Headlamps >> Pinpoint Tests >> Pinpoint Test A: Both Headlamps Are Inoperative >> Pinpoint Test A: Both Headlamps Are Inoperative

Pinpoint Test A: Both Headlamps Are Inoperative

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
  1. A1 CHECK FOR VOLTAGE TO THE HEADLAMP SWITCH 
    • Key in OFF position.
    • Disconnect: Headlamp Switch C205a
      • Fig 1: Checking Circuit For Voltage
      GF0008278Courtesy of FORD MOTOR CO.
    • Measure the voltage between the headlamp switch C205a-8, circuit 196 (DB/OG), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  A3.
    2. NO  : VERIFY the CJB fuse 7 (30A) is OK. If OK, go to  A2 .
  2. A2 CHECK CIRCUIT 196 (DB/OG) FOR AN OPEN 
    • Disconnect: CJB C270b
      • Fig 2: Checking Circuit For Open
      GF0008279Courtesy of FORD MOTOR CO.
    • Measure the resistance between the headlamp switch C205a-8, circuit 196 (DB/OG), harness side and the CJB C270b-12, circuit 196 (DB/OG), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new CJB. TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  3. A3 CHECK CIRCUIT 15 (RD/YE) FOR AN OPEN 
    • Disconnect: Multifunction Switch C202a
      • Fig 3: Checking Circuit For Open
      GF0008280Courtesy of FORD MOTOR CO.
    • Measure the resistance between the headlamp switch C205a-9, circuit 15 (RD/YE), harness side and the multifunction switch C202a-8, circuit 15 (RD/YE), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A4.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  4. A4 CHECK FOR VOLTAGE TO THE MULTIFUNCTION SWITCH 
    • Connect: Headlamp Switch C205a
    • Place the headlamp switch in the HEADLAMPS ON position.
      • Fig 4: Checking Circuit For Voltage
      GF0008281Courtesy of FORD MOTOR CO.
    • Measure the voltage between the multifunction switch C202a-8, circuit 15 (RD/YE), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
    2. NO  : INSTALL a new headlamp switch. REFER to Headlamp Switch . TEST the system for normal operation.
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