Circuit Operation

With the ignition switch in RUN, voltage is applied to the window switches from circuit breaker "C" to the PNK wires (CKT 76). Ground to the motors comes from the master power window switch assembly by way of G200. See WIRING DIAGRAMS  .

The power windows are driven by reversible permanent magnet motors. Each motor is controlled by two normally closed and grounded switches. When the right hand front power window UP switch is in the UP position, the DK BLU/WHT motor wire is connected to battery voltage and the motor runs to drive the window up. See WIRING DIAGRAMS  . When the switch is released, the contacts return to their normal position and the DK BLU/WHT motor wire is returned to ground. The motor stops.

To lower the window, the DN switch connects the TAN motor wire to battery voltage. See WIRING DIAGRAMS  . The polarity across the motor is reversed from the polarity that occurs when the UP switch is pressed. The motor runs the opposite way to drive the window down. The other window circuits operate in a similar manner.

Each motor is protected by a built in solid state circuit breaker. If a window switch is held on too long with the window obstructed or after the window is fully up or down, the circuit breaker opens the circuit. The circuit breaker resets automatically.