Power Window Operation

The power window system will operate when the ignition switch is in the ACC or RUN position. The power window system also operates whenever the body control module (BCM) is in the retained accessory power (RAP) mode. Battery voltage is supplied to the power window switches through the accessory voltage supply circuit. The passenger door window can be operated, either from a power window switch built into the driver door switch assembly (DDSA), or from a power window switch mounted locally on the passenger door. The driver door window can be operated only from the driver door power window switch built into the DDSA. Both driver and passenger power window switches receive a constant ground source.

The power window motor control circuits are connected to ground through the normally closed up and down contacts of the power window switches. When a power window switch is placed in the down position, the power window motor down control circuit is supplied with 12 volts that is applied to the down side of the power window motor. Ground is supplied through the closed contacts of the power window Up switch allowing the power window to travel down. By placing the power window switch in the up position, the polarity of the power window motor is reversed and the window travels up.