Stationary Windows
Description and OperationAdhesive 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 4OOHV. 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.
Full-Cut Method Description
Use only the full cut method, also known in the field as full strip method, when installing windows. This method includes the following:
- The replacement of a majority of the urethane adhesive bead. Remove all but approximately 2 mm (3/64 in) of the existing bead of urethane adhesive from the pinch-weld flange.
- Apply pinch-weld primer to any exposed painted areas on the pinch-weld flange.
No mounds or loose pieces of urethane adhesive should remain on the pinch-weld flange. Do not remove all traces of urethane adhesive.
Important:
- If corrosion of the pinch-weld flange is present, or if sheet metal repairs or replacements are required, refinish the pinch-weld flange in order to present a clean, primer-only surface.
- If paint repairs are required, mask the flange bonding area, prior to applying the color coat, in order to provide a clean, primer-only surface.
- Appropriate materials for these primer applications are typically 2 component catalyzed products. Use materials such as BASF DE15©, DuPont 2610©, Sherwin-Williams PSE 4600 and NP7O© and Martin-Semour 5120,5130©, PPG DP9OLF SPIES/HECKER 3688/8590 - 3688/5150 - 4070/5090 STANDOX 11158/13320 - 14653/14980 products are approved for this application. Follow the manufacturer's directions for the mix, the application, and the drying times. After repairing the opening as indicated, shake the pinch-weld primer black #3 well. Using a new dauber, apply the primer to the primed surface of the flange in the bonding area. Allow the primer to dry for 10 minutes.
Stationary Window Description
Most stationary windows, specifically windshields, are retained to the body with urethane adhesive which adheres the window to the body, increasing structural integrity. The reinstallation of the windows with urethane adhesive requires complete replacement of the urethane adhesive bead, and is known as the full cut method.
Rear Window Defogger Description and Operation
The rear window heating element not only contains a heating element to enable the defogging of the rear window, but also contains an AM antenna for the vehicle radio system. The 2 separate systems are integrated through the radio antenna and rear window defog module.
This rear window defogging system imposes a time limit on the heating of the rear window in order to avoid excess load on the vehicle battery.
The heating operation is controlled using the heated-rear-window switch located in the instrument fascia. This is a momentary-contact switch, which toggles power ON or OFF when it is pressed.
The heating is timed to continue for 15 minutes and each new activation of the heated-rear-window switch resets the delay timer.
Heating the rear window is only available when the ignition is ON, engine running. It defaults back to the OFF position when the ignition key is switched to OFF.
Circuit Description
Control of the heated-rear-window is through the heated-rear-window relay R3. This relay is located on the fuse panel in the engine compartment and is connected in parallel with the heated-rear-window indicator lamp (DEFOG) located in the heater and air conditioner controls.
Pressing the heated rear window defog switch closes the switch contacts at X2-1 and connects battery voltage through circuit 539 to the body control module (BCM) terminal X2-12 via circuit 292. This increase in voltage at BCM terminal X2-12 is seen by the BCM as the heated rear window switch input signal. Power is then applied to the coil of the Defog Relay R3 from the output of the ignition control relay R21, via fuse F13 and circuit 539. Once the internal BCM timer is initialized, it connects the Defog Relay R3 pull-in coil circuit to ground via BCM terminal X1-18, circuit 681. This causes the relay contacts to close, supplying battery voltage from fuse F22 through circuit 2540 and circuit 293 to the radio antenna/rear window defog module A93. The ground connection for the heated rear window is via circuit 1850.
Defogging of the rear window can only occur when the ignition is ON, engine running. This defaults to OFF when the ignition has previously been ON and is switched back to OFF and back to the ON position.