Master Switch Assembly

When the ignition switch in RUN position, battery voltage is applied to the master switch assembly from circuit breaker 1.

Battery voltage is applied to the window motor when any UP switch in the master switch assembly not associated with express down is operated. The window motor is grounded through the DN contact in the master switch assembly. The motor runs to drive the window up. Battery voltage is applied to the window motor in the opposite direction when any DN switch in the master switch assembly is operated. The window motor is grounded through the UP contact in the master switch assembly. The motor runs to drive the window down.