Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the S52 outside rearview mirror switch.
- Wait 1 minute, test for less than 10 Ω between the ground circuit terminal 5 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 4 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Ignition OFF, connect the harness connector at the S52 outside rearview mirror switch.
- Disconnect the harness connector at the appropriate A9 outside mirror.
- Connect a test lamp between the control circuit terminal 2 and the control circuit terminal 8.
- Operate the vertical switch UP and DOWN. The test lamp should turn ON when commanding the UP and DOWN states.
- If the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground, or an open/high resistance on both control circuits. If the circuits test normal, replace the S52 outside mirror switch.
- Connect a test lamp between the control circuit terminal 7 and the control circuit terminal 8.
- Operate the horizontal switch LEFT and RIGHT. The test lamp should turn ON when commanding the LEFT and RIGHT states.
- If the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground, or an open/high resistance on both control circuits. If the circuits test normal, replace the S52 outside mirror switch.
- If all circuits test normal, test or replace the M77 outside rearview mirror motor.