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Home › GMC › 2007 › Acadia SLE, FWD › Repair and Diagnosis › Body & Frame › Mirrors › Mirror System › Diagnostic Information and Procedures › DTC B1722 › Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector X1 at the outside rearview mirror.
  2. Install a test lamp between the control circuit terminal 1 and the control circuit terminal 2.
  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 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 appropriate door switch.
  4. If all circuits test normal, test or replace the outside rearview mirror motor.
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