Circuit/System Testing
- Vehicle OFF, disconnect the harness connector at the S52 outside mirror switch.
- Wait 1 minute, test for less than 10 Ω between the ground circuit terminal 11 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Vehicle in Service Mode, verify that a test lamp illuminates between the B+ circuit terminal 12 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Vehicle OFF, connect the harness connector at the S52 outside mirror switch.
- Disconnect the harness connector at the appropriate A9 outside rearview mirror.
- Connect a test lamp between the control circuit terminal H and the control circuit terminal B.
- 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 the control circuits. If the circuits test normal, replace the S52 outside mirror switch.
- Connect a test lamp between the control circuit terminal H and the control circuit terminal G.
- 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 the control circuits. If the circuits test normal, replace the S52 outside mirror switch.
- If all circuits test normal, test or replace the A9 outside rearview mirror.