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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 829 (Instrument Cluster And Panel Illumination) >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test D: The Audio System Illumination Is Inoperative

Pinpoint Test D: The Audio System Illumination Is Inoperative

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. D1 CHECK CIRCUIT 19 (LB/RD) FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: Audio Unit C2188a.
    • Place the headlamp switch in the PARK position and rotate the headlamp switch knob fully counterclockwise without turning on the interior lamps.
    • Measure the voltage between the audio unit C2188a pin 1, circuit 19 (LB/RD), harness side and ground.
      Fig 1: Measuring Voltage Between Audio Unit And Ground
      G03890229Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to D2.
    • No  : REPAIR the circuit. TEST the system for normal operation.
  2. D2 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
    • Measure the resistance between the audio unit C2188a pin 2, circuit 57 (BK), harness side and ground.
      Fig 2: Measuring Resistance Between Audio Unit And Ground
      G03890230Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : SEND the audio unit to an authorized audio repair facility. TEST the system for normal operation after the repair.
    • No  : REPAIR the circuit. TEST the system for normal operation.
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