Power Windows

CIRCUIT OPERATION
Motor Operation
The Power Windows are driven by reversible permanent magnet motors. Each motor is controlled by two normally closed and grounded switches. When the RH Window Switch is in the "UP" position, CKT 166 is connected to battery voltage and the motor runs to drive the window up. When the switch is released, the contacts return to their normal position and CKT 166 is returned to ground causing the motor to stop.

Lowering Windows
To lower the window, the switch connects CKT 167 to battery voltage. 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.

Motor Protection
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 frilly up or down, the circuit breaker opens the circuit. The circuit breaker resets automatically.