Power Windows Description and Operation

Power Windows Description and Operation

Power Window System Components

The power window system consists of the following components:

* Body control module (BCM)
* Driver window switch
* Front passenger window switch
* Left rear window switch
* Right rear window switch
* Window regulator motors in each of the doors
* PWR WINDOW - (3) 30-amp fuses



Power Window System Controls

The power window 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 regulator motor causing the window to open. When the driver window switch is pressed in the up position, voltage is applied to the window regulator motor in the opposite direction and the window closes.


The driver window switch also controls the passenger windows.


Express Down Feature

The 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.


Lockout Switch Feature

The driver window switch has a lockout switch which disconnects the battery positive voltage to the left rear and right rear passenger window switches, disabling them.


Individual Window Operation

When the ignition switch is in the RUN or ACCY position, or retained accessory power (RAP) is enabled and the lockout switch is disengaged, battery positive voltage will be available at the passenger window switches. When an individual window switch is pressed in the down position, battery positive voltage is applied to the window regulator motor causing that window to open. When the individual window switch is pressed in the up position, voltage is applied to the window regulator motor in the opposite direction causing that window to close. The return path to ground is supplied through the inactive control circuit being normally grounded through the driver window switch.