Outside Rearview Mirror Switch Testing
- Ignition OFF, disconnect the harness connector at the outside rearview mirror switch.
- Test for infinite resistance between all of the signal terminals and the voltage supply terminal and the ground circuit with the switch in the open position.
- If less than infinite resistance, replace the rearview mirror switch.
- Test for less than 1 Ω of resistance between all of the control terminals and ground with the outside rearview mirror switch in the proper positions.
- If greater than 1 Ω, test the ground circuit for an open/high resistance. If the circuits test normal, replace the rearview mirror switch.