Master Switch Assembly 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.
When the Ignition Switch is in "RUN," battery voltage is applied to the Master Switch Assembly through the PWR WDO Circuit Breaker and CKT 76.
When any of the "UP" switches in the Master Switch Assembly not associated with Express Down are operated, battery voltage is applied to the Power Window Motor. The Power Window Motor is grounded through the "DN" contact in the Master Switch Assembly. The Power Window Motor runs to drive the window up. When any of the "DN" Switches in the Master Switch Assembly are operated, battery voltage is applied to the Power Window Motor in the opposite direction. The Power Window Motor is grounded through the "UP" contact in the Master Switch Assembly. The Power Window Motor runs to drive the window down.