Component Testing

Outside Rearview Mirror Switch Testing 

1. Ignition OFF, disconnect the harness connector at the outside rearview mirror switch.
2. 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.
3. Test for less than 1 ohm of resistance between all of the control terminals and ground with the outside rearview mirror switch in the proper positions.
   • If greater than 1 ohm, test the ground circuit for an open/high resistance. If the circuits test normal, replace the rearview mirror switch.

Outside Rearview Mirror Motor Testing 

1. Ignition OFF, disconnect the harness connector at the outside rearview mirror motor.
2. Test for 29-90 ohms of resistance between the control terminal and the ground terminal of the rearview mirror motor.
   • If the resistance is not within the specified range, replace the rearview mirror motor.