Important: The power windows system has voltage applied by the Windows circuit breaker. The body control module  (BCM) contains the Retained Accessory Power  (RAP) subsystem. The RAP subsystem allows the windows to operate for 10 minutes after the ignition is turned off or until a door is opened. Refer to retained accessory power for a complete understanding of RAP operation.

When the ignition switch is in the RUN position or the ACCY position or the BCM is in the RAP mode, voltage is applied to the Windows circuit breaker. Circuit 341 applies the voltage from the Windows circuit breaker to the left side window switch, the right side window switch, and the power window control module. The front side door window motors and the switches are grounded by circuit 750 and G200 through the left side window switch. The right window can be operated from the right side window switch and the left side window switch. The left window can only be operated from the left side window switch. The windows are driven by reversible motors. Each window is controlled by a switch that is normally closed to ground. When any switch is moved to the up position, battery voltage is applied to the window motor through circuit 164 (left) or through circuit 666 (right). The motor is grounded through circuit 165 (left) or through circuit 667 (right). When any switch is moved to the down position, the voltage polarity at the window motor is reversed. Battery voltage is applied to the motor through circuit 165 (left) or through circuit 667 (right). The motor is grounded through circuit 164 (left) or through circuit 666 (right).

Each window motor contains an internal electronic circuit breaker. If a window switch is held in the up or down position after the window is fully opened or closed, the circuit breaker opens to stop the motor. The circuit breaker also opens to stop the window when the window becomes obstructed during operation. The circuit breaker resets when the voltage to the motor is interrupted.

The power window system also includes an express down feature. This feature allows the left window to open completely when the left window switch is momentarily pressed in the down position. All of the solid state circuitry for the express down feature is contained in the power window control module.