GM Service Manual Online
For 1990-2009 cars only

Power Window System Components

The power window system consists of the following components:

    • LF power window master switch.
    • RF power window switch.
    • LR power window switch (4 door vehicles).
    • RR power window switch (4 door vehicles).
    • Window lockout switch (4 door vehicles).
    • Window up and window down relays in each of the passenger window switches.
    • Reversible power window motors in each of the doors (circuit breaker protected).
    • PWR WDO CB 25A (fuse block) (System power for left and right windows 2 door vehicles. System power for LF and LR windows 4 door vehicles)
    • PWR WDO CB 25A (IP wiring harness junction block) (System power for RF and RR windows 4 door vehicles)

A built-in circuit breaker protects each motor. The circuit breaker opens the circuit when the switch is open for too long of a period of time under the following conditions:

    • The window has an obstruction.
    • The window is fully open or fully closed.

The circuit breaker resets automatically as the circuit breaker cools.