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Home >> Chevrolet >> 2010 >> Traverse LT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 487 (Mirror System) >> Diagnostic Information and Procedures >> Power Mirror Malfunction (With DS3 and W49) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X1 harness connector at the outside rearview mirror.
  2. Connect a test lamp between the control circuit terminal 2 and the control circuit terminal 6.
  3. Command the mirror left and right using the mirror directional switch. The test lamp should turn ON and OFF as the mirror commanded to the left and right.
    • If the test lamp is always ON, test both control circuits for a short to voltage. If the circuit tests normal, replace the appropriate door switch.
    • If the test lamp is always OFF, test both control circuits for a short to ground or an open/high resistance. If the circuit tests normal, replace the door switch.
  4. Connect a test lamp between the control circuit terminal 1 and the control circuit terminal 6.
  5. Command the mirror up and down using the mirror directional switch. The test lamp should turn ON and OFF as the mirror commanded up and down.
    • If the test lamp is always ON, test both control circuits for a short to voltage. If the circuit tests normal, replace the door switch.
    • If the test lamp is always OFF, test both control circuits for a short to ground or an open/high resistance. If the circuit tests normal, replace the door switch.
  6. If all circuits test normal, test or replace the outside rearview mirror motor.
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