Windows: Description and Operation

Circuit Description
A permanent magnetic motor operates the front Left/Right power windows. Each motor raises or lowers the glass when voltage is supplied to it. The direction of the motor depends on the polarity of the supply voltage. The power window main switch controls all the power window motors. Each window switch controls only one of the power window motors. If the lock switch is depressed, the rear power windows and the right front power window cannot be controlled by each window switches, but they can still be controlled from the power window main switch.

Power Window Main Switch Operation
Battery voltage is applied to the contacts of the power window relay at all times. The coil of the relay is supplied battery voltage when the ignition switch is in ON position. Battery voltage is then supplied to power window main switch through the closed relay contacts. When any of the switches in the power window main switch are operated, battery voltage is applied to the power window motor. The power window motor is grounded through the opposite contact in the power window main switch. The power window motor runs to drive the window.

Window Switch Operation
With the power window relay energized, battery voltage is also supplied to the passenger window switches as long as the lock switch in the power window main switch is OFF (not depressed). When the passenger windows switch is operated, battery voltage is applied to one terminal of the power window motor and the other terminal is grounded through the opposite contact in the window switch and the main switch. The power window motor runs to drive the window.