Windows: Description and Operation

A permanent magnet (PM) motor operates each of the power windows. Each motor raises or lowers the glass when voltage is supplied to it. The direction the motor turns depends on the polarity of the supply voltage.

The master switch assembly (on the driver's door) controls all of the motors individually. Each window switch on the other doors controls one of the motors.

Master Switch Assembly Operation
Battery voltage is applied at all times to the "P/WIN" fuse. When the ignition switch is "ON," battery voltage is applied to the master switch assembly through the power window relay and the BLK/RED wire.

When any of the "UP" switches in the master switch assembly are operated, battery voltage is applied to the window motor. The window motor is grounded through the "DOWN" contact in the master switch assembly. The motor runs to drive the window up. When any of the "DOWN" switches in the master switch assembly are operated, battery voltage is applied to the window motor in the opposite direction. The window motor is grounded through the "UP" contact in the master switch assembly, and the motor runs to drive the window down.

Window Switch Operation
When the ignition is "ON," battery voltage is applied to the window switches from the power window relay, the BLK/RED wire and the window lock-out switch. When the "UP" switch in the window switch is operated, battery voltage is applied to the window motor. The motor is grounded through the GRN wire, the "DOWN" contact in the window switch, and the "DOWN" contact in the master switch assembly. The motor runs to drive the window up. When the "DOWN" switch in the window switch is operated, battery voltage is applied to the window motor in the opposite direction. The motor is grounded through the "UP" contact in the window switch and the "UP" contact in the master switch assembly. The motor runs to drive the window down.