GM Service Manual Online
For 1990-2009 cars only

Power Windows System Components

The power window system consists of the following components:

    • The driver window switch
    • The front passenger window switch
    • The driver window motor
    • The front passenger window motor
    • The system circuit breaker (PWR WDO Circuit Breaker 30A)

Power Windows System Controls

The power windows system can be controlled by a power window up or down switch activation.

Driver Window Operation

When the ignition switch is in the RUN or ACCY position, or retained accessory power (RAP) is enabled and the driver window switch is pressed in the down position, battery positive voltage is applied to the window motor causing the window to open. When the driver window switch is pressed in the up position, voltage is applied to the window motor in the opposite direction and the window closes.

The driver window switch also controls the front passenger window.

Express Down Feature

The LF driver window will travel to the fully down position when the driver window switch is pressed past the first detent. Pressing the driver window switch to the up position will cancel the express down feature.

Front Passenger Window Operation

When the ignition switch is in the RUN position and the front passenger window switch is pressed in the down position, voltage is applied to the window motor causing that window to open. When the front passenger window switch is pressed in the up position, voltage is applied to the window motor in the opposite direction causing that window to close.