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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 865 (Instrument Panel System Displays And Gauges) >> Diagnostic Information & Procedures >> Chime Always On >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, headlamp switch OFF, verify the scan tool Headlamp Switch parameter is Inactive.
    • If not Inactive, test the headlamps signal circuit for an open or short to voltage. If the circuit tests normal, replace the headlamp switch.
  2. Ignition ON, park lamp switch OFF, verify the scan tool Park Lamp Switch parameter is Inactive.
    • If not Inactive, test the park lamp switch signal circuit for an open or short to voltage. If the circuit tests normal, replace the headlamp switch.
  3. Ignition OFF, key out of the ignition, verify the scan tool Key In Ignition Status parameter is Key Out.
    • If not Key Out, test the key in ignition switch signal circuit for an open or short to voltage. If the circuit tests normal, replace the ignition switch.
  4. Ignition ON, doors closed, verify the scan tool Door Ajar Switch parameters are Inactive/Door Closed.
  5. If all circuits test normal, replace the BCM.
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