Windows: Description and Operation

Voltage is applied to the LH window from the Delayed Accessory Bus (DAB) relay which is fed from the PWR WDO Circuit Breaker and the DAB Circuit Breaker (Refer to "Delayed Accessory Bus [DAB]," for a more detailed description).

The Power Windows are driven by reversible permanent magnet motors. Each motor is controlled by two normally closed switches resting at voltage. When the RH Front Power Window UP Switch is in the "UP" position, the DK BLU/WHT motor wire is connected to ground and the motor runs to drive the window up. When the switch is released, the contacts return to their normal position and the DK BLU/WHT motor wire is returned to voltage. The motor stops.

To lower the window, the DN Switch connects the TAN motor wire ground. 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 LH window circuit operates 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.