Power Window Switch: Description and Operation

Circuit Description
A permanent magnetic motor operates each of the power windows. Each motor raises or lowers the glass when voltage is supplied to it. The polarity of the supply voltage determines direction the motor turns. 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 in the power outside mirror switch is depressed, the rear power windows and the right front power window cannot be controlled by their own window switches. However, they can still be controlled by the power window main switch. Power Window Main Switch Operation

Battery voltage is applied at all times to both the coil and contact of the power window relay. The coil of the relay is energized when the ETACS control module supplies ground to the coil. Battery voltage is then supplied to the 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 appropriate 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
When the power window relay coil is energized, battery voltage is also supplied to the appropriate passenger window switches as long as the lock switch in the power outside mirror switch is in unlock position. When the passenger window 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.