Power Window Switch: Description and Operation

FRONT PASSENGER DOOR POWER WINDOW SWITCH
The front passenger door module supplies battery voltage to the two signal circuits, and a ground to the ground circuit, of its associated window switch. One of the signal circuits is for an Up signal, the other signal circuit is for a Down signal. When the window switch is operated to the Up or Down position, the normally open contacts for that function are closed to ground and battery voltage flows through the circuits and the switch, providing the front passenger door module with the neccessary signal input.

The front passenger door window can be operated in the express down mode from the front passenger door window switch. The switch is constructed in a way that allows for the contacts of the two signal circuits to indicate an express down command. When the window switch lever is pulled to the second detente of the down position, first the down signal contacts are closed, then the up signal contacts are closed. The front passenger door module interprets this two contact signal as an express down request.

REAR DOOR POWER WINDOW SWITCHES
The rear door power window switches are similar to the front passenger door power window switch, however, rear door windows do not have the express down capability. Each rear door module supplies battery voltage to the two signal circuits, and a ground to the ground circuit, of its associated window switch. One of the signal circuits is for an Up signal, the other signal circuit is for a Down signal. When the window switch is operated to the Up or Down position, the normally open contacts for that function are closed to ground and battery voltage flows through the circuits and the switch, providing the rear door module with the neccessary signal input.