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Home >> Chevrolet >> 2006 >> Impala SS >> Repair and Diagnosis (Single Page) >> Body & Frame >> Ignition Switch/Steering Lock >> Steering Wheel & Steering Column >> Diagnostic Information and Procedures >> Steering Wheel Controls Inoperative >> Circuit/System Testing

Circuit/System Testing

CAUTION: Refer to SIR Caution .
  1. Ignition OFF, disconnect the harness connector at the audio steering wheel control switch.
  2. Ignition ON, test for 12 volts between the remote radio control supply voltage circuit and ground at the switch harness connector.
    • If less than 10 volts, test the voltage circuit for a short to ground or an open/high resistance. If circuit test normal, replace the BCM.
  3. Ignition ON, connect a test lamp between the signal circuit to the BCM and ground at the switch connector.
    • If test lamp illuminates, test the signal circuit for short to voltage. If circuit test normal, replace the BCM.
  4. Ignition OFF, test for less than 1 ohm of resistance between the signal circuit and ground, at the switch harness connector.
    • If greater than 1 ohm, test the signal circuit for an open/high resistance. If circuit tests normal, replace the BCM.
  5. Ignition OFF, disconnect the harness connector at the BCM and switches.
  6. Test for infinite resistance between the signal circuit and ground at the switch harness connector.
    • If less than infinite resistance, test the signal circuit for a short to ground.
  7. If circuit tests normal, test or replace the switch.
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