Circuit/System Description

When the ignition switch is in the RUN or ACCY position, or retained accessory power is enabled and the driver or passenger window switch or rear window switch is pressed in the down position, voltage is applied to the appropriate window motor causing that window to open. When the driver or passenger window switch is pulled in the up position, voltage is applied to the appropriate window motor in the opposite direction causing that window to close.

When the driver wishes to command a passenger or rear window, a window switch is pressed on the driver window switch. A serial data message is then sent to the body control module (BCM) from the driver window switch. The BCM will examine the request and check for messages from other power window switches that may prohibit the window movement. If no prohibitive messages have been received, the BCM will send a serial data message to the passenger or rear window switch which will command the window motor to perform as requested.