GM Service Manual Online
For 1990-2009 cars only

Each of the outside mirrors has 2 reversible motors. The motors perform the following functions:

    • One motor adjusts the view up and down.
    • One motor adjusts the view left and right.

The driver operates 4 switches. These switches control the polarity of the voltage to the motors. The mirror select switch directs these control voltages to the following outside mirrors:

    • The left outside mirror
    • The right outside mirror

When the switches are in the positions shown in the schematic, the left outside mirror moves. When you move the Up-Down switch to the DOWN position, the following actions occur:

  1. Battery voltage from CKT 1040 is applied to the following components:
  2. • CKT 1499
    • The up-down motor in the left outside mirror
  3. The left outside mirror up-down switch supplies a path to ground through the following components:
  4. • CKT 88
    • The DOWN position contacts of the up-down switch
    • CKT 150
  5. The left mirror up-down motor runs. This turns the mirror up.

If you push the mirror control switch to the UP position, the above process repeats, with the following differences:

    • The same motor receives voltage.
    • CKT 1499 is grounded.
    • The motor runs in order to turn the mirror down.

The left left-right motor operates in a similar manner when you move the left-right joystick to the LEFT position. CKT 1499 receives battery voltage and CKT 81 is grounded through the left-right switch.

The left left-right motor operates in a similar manner when you move the left-right joystick to the RIGHT position. CKT 1499 receives battery voltage and CKT 81 is grounded through the left-right switch.