LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1111 (Mirror Systems) >> Diagnostic Information and Procedures >> Power Mirror Folding Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the inline harness connector at the outside rearview mirror.
  2. Install a test lamp between the control circuit terminal 7 and the control circuit terminal 5.
  3. Ignition ON, commanded the mirrors to extend and retract using the power folding switch. The test lamp turn ON and OFF when changing between the commanded states.
    • 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 module.
    • 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 appropriate door module.
  4. If all circuits test normal, test or replace the outside rearview mirror motor.
scientia non olet · About LEMON Manuals