Circuit/System Description
Battery positive voltage is supplied through the BATT 1 fuse in the underhood fuse block to the rear defog relay switched input. When the rear defog switch button is pressed, the body control module (BCM) energizes the rear defog relay by providing a B+ to the control circuit of the rear defog relay. This allows battery positive voltage from the relay switched input through the switch contacts and out the relay switched output to the rear window defogger grid. The HVAC control module houses the rear defog switch and also illuminates the rear defog indicator on the switch button, upon this request. Ground for the rear window defogger grid is provided by G301 for the Sedan or G302 for the Extended Sedan.
When you start the engine and press the rear defog switch button, the defog cycle lasts for 10 minutes. Further operation will result in 5 minute defog cycles.
The rear defogger feature will not time out if vehicle speed is above 48 km/h (30 mph).
If battery voltage is low, the rear defogger feature will be disabled.
Battery positive voltage is supplied through the BATT 1 fuse in the underhood fuse block to the rear defog relay switched input. When the rear defog switch button is pressed, the body control module (BCM) energizes the rear defog relay by providing a B+ to the control circuit of the rear defog relay. This allows battery positive voltage from the relay switched input through the switch contacts and out the relay switched output to the rear window defogger grid. The HVAC control module houses the rear defog switch and also illuminates the rear defog indicator on the switch button, upon this request. Ground for the rear window defogger grid is provided by G301 for the Sedan or G302 for the Extended Sedan.
When you start the engine and press the rear defog switch button, the defog cycle lasts for 10 minutes. Further operation will result in 5 minute defog cycles.
The rear defogger feature will not time out if vehicle speed is above 48 km/h (30 mph).
If battery voltage is low, the rear defogger feature will be disabled.
Battery positive voltage is supplied through the BATT 1 fuse in the underhood fuse block to the rear defog relay switched input. When the rear defog switch button is pressed, the body control module (BCM) energizes the rear defog relay by providing a B+ to the control circuit of the rear defog relay. This allows battery positive voltage from the relay switched input through the switch contacts and out the relay switched output to the rear window defogger grid. The HVAC control module houses the rear defog switch and also illuminates the rear defog indicator on the switch button, upon this request. Ground for the rear window defogger grid is provided by G301 for the Sedan or G302 for the Extended Sedan.
When you start the engine and press the rear defog switch button, the defog cycle lasts for 10 minutes. Further operation will result in 5 minute defog cycles.
The rear defogger feature will not time out if vehicle speed is above 48 km/h (30 mph).
If battery voltage is low, the rear defogger feature will be disabled.
When the ignition switch is in the RUN or ACCY position, or retained accessory power (RAP) is enabled and the driver window switch is pressed in the down position, battery positive voltage is applied to the window regulator motor causing the window to open. When the driver window switch is pressed in the up position, voltage is applied to the window regulator motor in the opposite direction and the window closes. The driver window switch also controls the passenger windows.
When the ignition switch is in the RUN or ACCY position, or RAP is enabled and the lockout switch is disengaged, battery positive voltage will be available at the passenger window switches. When an individual window switch is pressed in the down position, battery positive voltage is applied to the window regulator motor causing that window to open. When the individual window switch is pressed in the up position, voltage is applied to the window regulator motor in the opposite direction causing that window to close. The return path to ground is supplied through the inactive control circuit being normally grounded through the driver window switch.
The drivers window also has an express-down feature. This switch is labeled AUTO. Press the front of the switch part way, and the driver window will open a small amount. If the front of the switch is pressed all the way down and released, the window will go all the way down automatically.
To stop the window while it is lowering, pull the front of the switch momentarily. To raise the window, pull and hold the front of the switch.
Adhesive Service Kit Description
The GM Adhesive Caulking Kit P/N 12346392 (Canadian P/N 10952983) contains the following items
- Four different primers
- A tube of urethane adhesive with a nozzle
- Four daubers
- Instructions with warnings
Use the urethane adhesive caulking kit for replacement of any urethane adhesive-installed window using the full cut method.
You may use any of the following equivalent urethane adhesive systems which meet GM Specification GM 3651G
- Dow Automotive - Essex 400HV. One part and requires associated primers.
- Dow Automotive - Essex U216. Two part and requires associated primers. Call Dow Automotive at 1-800-453-3779 for more information.
- 3M™ "Fast Cure" Auto Glass Urethane. One part and requires associated primers. Call 3M™ at 1-877-666-2277 for more information.
Use these materials based on specific manufacturer. Do NOT intermix primers or adhesives from one manufacturer to another.
Always follow the system manufacturer's instructions for application, handling, and curing.
Stationary Window Description
Most stationary windows, specifically windshields, are retained to the body with urethane adhesive which adheres the window to the body. This increases structural integrity. The reinstallation of windows with urethane adhesive requires complete replacement of the urethane adhesive bead
The extended method (also known as long method, full strip or full cut) is the only recommended procedure for General Motor Vehicle.
Driver Window Operation
When the ignition switch is in the RUN or ACCY position, or retained accessory power (RAP) is enabled and the driver window switch is pressed in the down position, battery positive voltage is applied to the window regulator motor causing the window to open. When the driver window switch is pressed in the up position, voltage is applied to the window regulator motor in the opposite direction and the window closes.
The driver window switch also controls the passenger windows.
Individual Window Operation
When the ignition switch is in the RUN or ACCY position, or retained accessory power (RAP) is enabled and the lockout switch is disengaged, battery positive voltage will be available at the passenger window switches. When an individual window switch is pressed in the down position, battery positive voltage is applied to the window regulator motor causing that window to open. When the individual window switch is pressed in the up position, voltage is applied to the window regulator motor in the opposite direction causing that window to close. The return path to ground is supplied through the inactive control circuit being normally grounded through the driver window switch.
Rear Window Defogger Operation
Battery positive voltage is supplied through the BATT 1 fuse in the underhood fuse block to the rear defog relay switched input. When the rear defog switch button is pressed, the body control module (BCM) energizes the rear defog relay by providing a B+ to the control circuit of the rear defog relay. This allows battery positive voltage from the relay switched input through the switch contacts and out the relay switched output to the rear window defogger grid. The HVAC control module houses the rear defog switch and also illuminates the rear defog indicator on the switch button, upon this request. Ground for the rear window defogger grid is provided by G301 for the Sedan or G302 For the Extended Sedan.
When you start the engine and press the rear defog switch button, the defog cycle lasts for 10 minutes. Further operation will result in 5 minute defog cycles.
The rear defogger feature will not time out if vehicle speed is above 48 km/h (30 mph).
If battery voltage is low, the rear defogger feature will be disabled.