Power mirror control system — description and check

1. Electric rear view mirrors use two motors to move the glass; one for up and down adjustments and one for left-right adjustments.

2. The control switch has a selector portion which sends voltage to the left or right-side mirror. With the ignition ON but the engine OFF, roll down the windows and operate the mirror control switch through all functions (left-right and up-down) for both the left and right-side mirrors.

3. Listen carefully for the sound of the electric motors running in the mirrors.

4. If the motors can be heard but the mirror glass doesn’t move, there’s probably a problem with the drive mechanism inside the mirror.

5. If the mirrors do not operate and no sound comes from the mirrors, check the fuse (see Fuses and fusible links — general information).

6. If the fuse is OK, remove the mirror control switch from its mounting without disconnecting the wires attached to it. Turn the ignition ON and check for voltage at the switch. There should be voltage at one terminal. If there’s no voltage at the switch, check for an open or short in the circuit between the fuse panel and the switch.

7. If the mirror motor fails to operate as described, replace the mirror assembly (see Body).

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