Circuit/System Description

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

The driver and passenger door lock and side window switches are integrated control module switch assemblies. The driver door lock/window switch controls the passenger window through a serial data message to the passenger door lock lock/window switch. When a power window switch is activated in the up or down positions the driver door lock/window switch or passenger door lock lock/window switch supplies power and ground to their respective window motor control circuits to drive the window motor in the required direction. The rear passenger power windows can also be operated from the driver door lock/window switch through a serial data message to the BCM. The rear passenger window switches on the driver door lock/window switch have 2 positions, up and down, their position is a direct input into the driver door lock/window switch. When the BCM receives a command to operate a rear window up or down, the appropriate signal is sent to the rear door window switch which will command the window motor to perform the up or down function.

Each power window contains a reversible power window motor. The direction the window travels is dependent upon the polarity of the supply voltage. By reversing polarity of the supply voltage the window motor will move up or down. Each power window motor is internally circuit breaker protected.