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Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Scan Tool Data List Circuit/System Testing 1. Ignition ON, headlamp switch OFF, verify the scan tool Headlamp Switch ON parameter is Inactive. If not Inactive, test the headlamps signal circuit for an open or short to voltage. If the 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 3. Ignition OFF, key out of the ignition, verify the scan tool Ign. Off/Run/Crank parameter is Inactive. If not Inactive, test the key in ignition signal circuit for a short to ground. If the circuit 4. Ignition ON, doors closed, verify the scan tool Door Ajar Switch parameters show Door Closed. If not Door Closed, go to Courtesy Lamps Always On . 5. If all circuits test normal, replace the BCM. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Ignition and Start Switch Replacement Headlamp Switch Replacement Control Module References for BCM replacement, setup and programming CHIME INOPERATIVE Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
2007 Hummer H3 2007 ACCESSORIES & EQUIPMENT Displays and Gages - H3
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