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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 492 (Instrument Cluster System 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 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
  1. D1 CHECK FOR POWER TO THE AUDIO UNIT 
    • Disconnect: Audio Unit C290a.
    • Place the headlamp switch in the PARK position.
    • Rotate the instrument panel dimmer switch to the full illumination position.
    • Measure the voltage between the audio unit C290a pin 1, circuit 19 (LB/RD), harness side and ground.
      Fig 1: Checking For Power To Audio Unit
      G03277008Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : GO to D2.
    2. No  : REPAIR the circuit. TEST the system for normal operation.
  2. D2 CHECK FOR GROUND AT THE AUDIO UNIT 
    • Measure the resistance between the audio unit C290a pin 2, circuit 57 (BK), harness side and ground.
      Fig 2: Checking For Ground At Audio Unit
      G03277009Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : REMOVE the audio unit and SEND it to an authorized audio system repair facility. After the repair, TEST the system for normal operation.
    2. No  : REPAIR the circuit. TEST the system for normal operation.
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