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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1967 (Instrument Cluster System And Panel Illumination (F250-F550)) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test A: The Control Illumination Is Inoperative/Always On >> Pinpoint Test A: The Control Illumination Is Inoperative/Always On

Pinpoint Test A: The Control Illumination Is Inoperative/Always On

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 THE PARKING LAMPS 
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Are the exterior lamps on? 
    1. YES  : Go to  A2.
    2. NO  : VERIFY the central junction box (CJB) fuse 17 (15A) is OK. If OK, REFER to EXTERIOR LIGHTING article for diagnosis of the exterior lamps.
  2. A2 CHECK CIRCUIT 14 (BN) FOR VOLTAGE 
    • Place the headlamp switch in the OFF position.
    • Disconnect: Headlamp Switch C205b
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Measure the voltage between the headlamp switch C205b-6, circuit 14 (BN), harness side and ground.
      • Fig 1: Checking Circuit 14 (BN) For Voltage
      GF0008141Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  A4.
    2. NO  : Go to  A3.
  3. A3 CHECK CIRCUIT 14 (BN) FOR AN OPEN OR SHORT TO GROUND 
    • Place the headlamp switch in the OFF position.
    • Disconnect: Headlamp Switch C205a
    • Measure the resistance between the headlamp switch C205a-12, circuit 14 (BN), harness side and the headlamp switch C205b-6, circuit 14 (BN), harness side; and between the headlamp switch C205a-12, circuit 14 (BN), harness side and ground.
      • Fig 2: Checking Circuit 14 (BN) For An Open Or Short To Ground
      GF0008142Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms between the headlamp switch connectors, and greater than 10,000 ohms between the headlamp switch and ground? 
    1. YES  : Go to  A4.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  4. A4 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
    • Place the headlamp switch in the OFF position.
    • Measure the resistance between the headlamp switch C205b-4, circuit 57 (BK), harness side and ground.
      • Fig 3: Checking Circuit 57 (BK) For Open
      GF0008143Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. A5 CHECK CIRCUIT 19 (LB/RD) FOR AN OPEN OR SHORT TO GROUND 
    • Disconnect: Audio Unit C290a
    • Measure the resistance between the headlamp switch C205b-1, circuit 19 (LB/RD), harness side and the audio unit C290a-3, circuit 19 (LB/RD), harness side; and between the headlamp switch C205b-1, circuit 19 (LB/RD), harness side and ground.
      • Fig 4: Checking Circuit 19 (LB/RD) For Open Or Short To Ground
      GF0008144Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms between the audio unit and the headlamp switch, and greater than 10,000 ohms between the audio unit and ground? 
    1. YES  : INSTALL a new headlamp switch. REFER to EXTERIOR LIGHTING article. TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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