Windows: Description and Operation

POWER WINDOWS DESCRIPTION AND OPERATION

POWER WINDOWS SYSTEM COMPONENTS
The Power Window System consists of the following components:
- Driver Door Module (DDM).
- Passenger Door Module(PDM).
- Left rear (LR) Door Module.
- Right rear (RR) Door Module.
- Window regulator motors in each of the doors.
- DDM/PDM Circuit Breaker 25-amp.

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 all functions of the power windows are controlled through the DDM with Pass-through signals, GMLAN Serial Data Bus; and LIN Serial Data commands to the window regulator motor causing the window to go up or down depending on the command request..

The DDM also controls the front passenger, left rear (LR), and right rear (RR) 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
On some models, the driver window switch has a lockout switch which disconnects the battery positive voltage to the front passenger, left rear (LR) and right rear (RR) window switches, disabling them.