Most electric rear view mirrors utilize two motors for adjustments, one for vertical movement and another for horizontal movement. When adjusting the mirror, the power mirror adjustment switch sends voltage to the left or right side mirror. With the ignition key in the ON position (engine not running), operate the mirror adjustment switch through all functions for both mirrors. Listen for the sound of the electric motors running; if the motors are audible but the mirror glass does not move, there may be an issue with the drive mechanism. If there is no sound from the mirrors, check the
Fuse. If the fuse is intact, remove the power mirror adjustment switch and have its continuity checked by a qualified repair facility. Additionally, test the ground connections. If the mirror remains unresponsive, remove it and check for voltage at the wires. If no voltage is detected in any switch position, inspect the circuit between the mirror and the adjustment switch for any opens or shorts. If voltage is present, remove the mirror and test it off the vehicle using jumper wires, replacing it if it fails this test.