Master Switch Assembly Operation

With the Ignition Switch in "RUN," battery voltage is applied to the Master Switch Assembly via CKT 76. The switch assembly is grounded via CKT 151. When any Master Switch Assembly "UP" switch not associated with express down is operated, battery voltage is applied to the Window Motor. The motor is grounded through the "DN" contact in the Master Switch Assembly, and it runs to drive the window up.
When a Master Switch Assembly "DN" 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 Master Switch Assembly, and it runs to drive the window down.