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1. Ignition ON, headlamps ON, vehicle in PARK, cover the front light sensor with a towel or other suitable item. Shine a flashlight at the rear light sensor while observing the inside If the mirror face does not dim, test or replace the inside rearview mirror. 2. Headlamps ON, park brake applied, cover the front light sensor with a towel or other suitable item. Shine a flashlight at the rear light sensor while observing the inside rearview If the mirror does not transition from dim to bright, refer to Reverse Input Malfunction 3. Remove the towel from the inside rearview mirror and remove the flashlight. Verify the inside rearview mirror face returns to its normal bright state. If the mirror face does not return to its normal state, test or replace the inside rearview Circuit/System Testing Reverse Input Malfunction 1. Ignition OFF, disconnect the harness connector at the inside rearview mirror. 2. Ignition ON, park brake applied, vehicle in REVERSE, test for B+ between the supply voltage circuit terminal 9 and ground. If less than the specified value, test the supply voltage circuit for a short to ground or 3. If all circuits test normal, test or replace the inside rearview mirror. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Inside Rearview Mirror Replacement POWER MIRROR FOLDING INOPERATIVE Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach.
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Mirrors - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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