GM Service Manual Online
For 1990-2009 cars only

Power Mirror System Description

The power mirror system incorporates a control switch, selector switch and two reversible motors in each mirror. One motor controls the LEFT / RIGHT function and other controls the UP / DOWN function.

Power for the power mirror system is supplied from the CTSY fuse through CKT 40 (ORN) to the power outside rearview mirror switch. Ground is supplied from G202 through CKT 150 (BLK) to the power outside rearview mirror switch.

Selector Switch Description

The selector switch is a three position switch, that selects which mirror (if any) can be controlled through the control switch. By selecting the OFF position, there is no continuity between the control switch and the power mirror. By selecting the left or right position, the switch contacts close and allow power and ground to flow between the control switch and the power mirrors.

Left / Right Description

With the selector switch to the LEFT mirror position and positioning the control switch in the LEFT position, CKT 82 (LT BLU) will be connected to CKT 40 (ORN) and CKT 981 (RED) will be connected to CKT 150 (BLK) allowing the LH power outside rearview mirror to move left. By positioning the control switch in the RIGHT position, CKT 82 (LT BLU) will be connected to CKT 150 (BLK) and CKT 981 (RED) will be connected to CKT 40 (ORN) allowing the LH power outside rearview mirror to move right.

The circuit numbers used in this description are for the LH power outside rearview mirror, the RH power outside rearview mirror operates the same way but the circuit numbers change.

Up / Down Description

With the selector switch to the LEFT mirror position and positioning the control switch in the UP position, CKT 89 (LT GRN) will be connected to CKT 150 (BLK) and CKT 981 (RED) will be connected to CKT 40 (ORN) allowing the LH power outside rearview mirror to move up. By positioning the control switch in the DOWN position, CKT 89 (LT GRN) will be connected to CKT 40 (ORN) and CKT 981 (RED) will be connected to CKT 150 (BLK) allowing the LH power outside rearview mirror to move down.

The circuit numbers used in this description are for the LH power outside rearview mirror, the RH power outside rearview mirror operates the same way but the circuit numbers change.