Power Window System Components
The power window system consists of the following components:
| • | Driver power window switch |
| • | Passenger power window switch |
| • | Passenger power window motor |
| • | Power window relay |
| • | Circuit breaker #5 (15A) |
| • | Circuit breaker #8 (20A) |
Power window System Controls
The power window system will operate anytime the ignition is in the ACCY or ON position.
Both the driver and passenger power window switches control the up and down functions of the passenger window. The driver power window switch also contains a lockout switch. The lockout switch controls the power window lockout signal circuit. When the lockout switch is in the disabled, the power window will operate normally. When the lockout switch is enabled, the power window will not operate from either power window switch.
Power Window Motor Operation
A permanent magnet motor operates the power window. The motor raises or lowers the glass when the motor receives voltage. The direction the motor turns depends on the polarity of the supply voltage. The power window switches control the polarity of the supply voltage. A built-in circuit breaker protects each motor. The circuit breaker opens when the switch is depressed for a extended period of time under the following conditions:
| • | The window has an obstruction. |
| • | The window is fully open or fully closed. |
The circuit breaker will reset automatically as the circuit breaker cools.
Power Window Operation
The power window system is supplied voltage through the power window relay. The supply side of the relay is connected to circuit breaker #8 through the battery positive voltage circuit. The relay coil is connected to a constant ground source and is controlled through the ignition 1 voltage circuit. When the ignition is placed in the ON position the relay is energized and voltage is available at both power window modules through the ignition 3 voltage circuit.
The up and down switches in the driver power window module simply provide a voltage signal to the passenger power window module when activated through the power window up and down signal circuits. The passenger power window up and down switches are connected in parallel to these signal circuits internally in the passenger power window module. When any of the switches are actuated, the passenger power window module will supply volage to the power window motor through the power window motor up or down circuit and ground the opposite side.
Power Window Lockout Operation
When the passenger power window module receives a voltage signal through the power window lockout signal circuit, operation of the power window is disabled.
