Power Windows System Components
The power window system consists of the following components:
| • | Main power window switch--Controls the up and down operation of all power windows |
| • | LR power window switch--Controls the up and down operation of the LR power window |
| • | RR power window switch--Controls the up and down operation of the RR power window |
| • | Window lockout switch--Part of the main power window switch and enables or disables rear power window operation from the rear window switches |
| • | Power window motors in each of the doors |
| • | PWR WDW 30 A fuse--Located in the underhood fuse block and provides voltage to the power window relay at all times |
| • | Power window relay--Located in the underhood fuse block and provides voltage to the power window switches when the ignition is in ACC or RUN |
Power Window System Controls
The power window system will operate any time the ignition is the ACC or RUN position. The main power window switch located in the console contains individual window switches for each of the power windows. All windows may be controlled up and down from the main power window switch. The individual rear passenger power window switches will only control the up and down operation of their respective power window.
Power Window Motor Operation
Each power window contains a reversible power window motor. The direction the window travels is dependent upon the polarity of the supply voltage. By reversing polarity of the supply voltage the window motor will move up or down. Each power window motor is internally circuit breaker protected.
Main Power Window/Switch Operation
Battery voltage is supplied to the main power window switch through the accessory voltage supply circuit. The main power window switch also receives a constant ground source. The power window motor control circuits are connected to ground through the normally closed up and down contacts of the main power window switch. When the main power window switch is placed in the down position, the power window motor down control circuit is switched to 12 volts which is applied to the down side of the power window motor. Since the other side of the power window motor is connected to ground through the normally closed contacts of the up switch, the window travels down. By placing the power window switch in the up position, the polarity of the power window motor is reversed and the window travels up.
Driver Power Window Express Down Operation
If the driver power window switch is pressed momentarily in the down position past the first detent, the window will express down to the full open position when the switch is released. To cancel the express down operation, momentarily press the driver power window to the up position.
Rear Passenger Power Window/Switch Operation
The rear passenger power window switches receive battery voltage through the power window master switch lockout signal circuit when the window lockout function is disabled. Ground for the rear passenger power window motors is supplied through the normally closed up and down contacts of both rear passenger power window switches and the main power window switch. When either rear passenger power window switch is placed in the down position, the power window motor down control circuit is switched to 12 volts which is applied to the down side of the rear passenger power window motor. Since the other side of the rear passenger power window motor is connected to ground through the normally closed up contacts of both the rear passenger and main power window switches, the window travels down. By placing the rear passenger power window switch in the up position, the polarity of the power window motor is reversed and the window travels up.
The rear passenger power windows can also be controlled from the main power window switches.
Power Window Lockout Operation
The main power window switch contains a window lockout switch. The window lockout switch completes or interrupts the window lockout control circuit. If the window lockout switch is enabled, there is no voltage available at the rear power window switches and the rear power windows will not operate from the rear power window switches. The rear power windows will operate from the console power window switches.
