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Home >> Chevrolet >> 2007 >> Uplander Base, 3.9 W >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> Chime Always On >> Circuit/System Testing

Circuit/System Testing

  1. Ignition ON, headlamp switch OFF, verify the scan tool Headlamp Off Switch parameter is Inactive.
    • If not Inactive, test the headlamps off 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 Off.
    • If not Off, 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 Inactive.
    • If not Inactive, test the key in ignition switch signal circuit for a short to ground. If the circuit tests normal, replace the ignition switch.
  4. Ignition ON, doors closed, verify the scan tool the LF and RF Door Ajar Switch parameters are Door Closed.
  5. Ignition ON, doors closed, verify the scan tool Left and Right Rear Door Ajar Switch parameters are Closed.
  6. If all circuits test normal, replace the BCM.
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