Test B: A Single Mirror Is Inoperative

PINPOINT TEST B: A SINGLE MIRROR IS INOPERATIVE

B1-B2:

B2-B3:

Normal Operation
The exterior mirror control switch uses circuit 542 (YE) as the common circuit for both of the exterior mirrors up/down and right/left movement. For the LH exterior mirror, the exterior mirror control switch either directs voltage or provides ground on circuits 540 (RD) and 541 (DB), depending on the direction of movement. For the RH exterior mirror, the exterior mirror control switch either directs voltage or provides ground on circuits 543 (DG) and 544 (VT) also depending on the direction of movement.

Possible Causes
- Circuit 540 (RD) open
- Circuit 541 (DB) open
- Circuit 542 (YE) open
- Circuit 543 (DG) open
- Circuit 544 (VT) open
- Exterior mirror control switch
- Exterior mirror motor