Taurus/Sable
1987 Taurus/Sable
36-86-2 Window, Rear-Defroster 36-86-2
DESCRIPTION AND OPERATION (Continued)
The rear window defrost grid is fed through the relay contacts from the fuse link wire. The input to the rear defrost control assembly from the ignition switch determines if the relay contacts will stay closed when activated by the ON-OFF rocker or buttons. When the ignition switch is in RUN position, moving the rocker or button to ON closes the relay contacts and also activates the timing circuit. The relay contacts will remain closed until they are
opened by the timing circuit, the rocker or button is depressed to the OFF position, or the ignition is turned to the OFF position. The circuit is protected by a fuse located in the fuse panel and a fuse link. The operating rocker (Taurus) or buttons (Sable) are spring-loaded to return from ON or OFF to its center (normal) position.
As soon as the switch is depressed to the ON position, it electrically connects power to energize the timer relay coil, thereby causing the normally open relay load contacts to close and provide power to the ON lamp and the rear window grid wires. The grid wires will continue to receive power for approximately ten minutes.
The control can be deactivated before automatic time out by momentarily depressing it to the OFF position or when the ignition switch is turned to the OFF position. For individual wiring harness applications refer to Section 34-20.
MAJOR SERVICE OPERATIONS
Grid Wire Repair
NOTE: A single break or any breaks that total more an 25 mm (1 inch) in one grid cannot be repaired. The rear window must be replaced. For breaks less than 25 mm (1 inch) long, use the following procedure:
Surface Preparations
1. The vehicle should be brought inside and permitted to come to room temperature of 16~C (60~F) or above.
2. Clean entire grid line repair area with Ford Glass Cleaner E4AZ-19C507-A (ESR-M 1495-
A) or equivalent or other suitable cleaning solvent to remove all dirt, wax, grease, oil or other foreign matter. It is important that repair area be clean and dry.
Mixing The bottle of Grid Repair Compound D8AZ-19562-A (ESB-M4J58-A) or equivalent and touch-up paint must be at room temperature. Shake bottle for at least one minute for thorough mixing. Shake frequently during use.
1987 Taurus/Sable
36-86-3 Window, Rear-Defroster 36-86-3
MAJOR SERVICE OPERATIONS (Continued)
Application
1. Mark location of break on outside of window.
2. Using cellulose tape, mask off area directly above and below grid break. The break area should be at the center of mask and tape gap must be no wider than existing grid line.
3. If both brown and silber layers of grid are broken or missing, apply a coating of the brown touchup paint across break area first. Two coats may be necessary to obtain proper color. Allow touch-up paint to dry, then apply three coats of silver grid repair compound, allowing three to five minutes drying time between coats. The coating of silver grid repair compound should extend at least 6.35 mm (1/4 inch) on both sides of break area.
NOTE: If the brown layer of the grid is not broken or missing, apply only the silver grid repair compound to the break.
4. Allow to dry for five minutes, then remove mask.
5. After removing mask, check outside appearance of grid repair. If silver repair compound is visible above or below grid, this excess should be removed. This can be done by placing a single-edge razor blade on the glass parallel to grid and scrape gently toward grid.
CAUTION: Be careful not to damage the grid line with the razor blade.
Curing
The repair coating will air dry in approximately one minute and can be energized within three to five minutes. Optimum hardness and adhesion occurs after approximately 24 hours. At that time, the repair area may be cleaned with a mild window cleaner.
Lead Wire Terminal Service
1. Allow rear window to warm up to room temperature for one-half hour to a hour.
2. Clean bus bar in area to be repaired using fine steel wool (3/0 to 4/0 grade).
3. Restore area where bus bar terminal was originally attached by applying three coats of Grid Repair Compound D8AZ-19562-A (ESBM4J58-A) or equivalent. Allow approximately ten minutes drying time between coats.
4. Work as quickly as possible to avoid overheating glass. Tin bus bar with solder in area where terminal will be reattached.
5. Using a heat gun or heat lamp, preheat glass in the solder area to 67~-83~C (120~-150~F), just prior to soldering terminal on.
6. Position terminal on bus bar in area that was tinned and hold it in place with an ice pick or screwdriver.
7. Apply soldering heat to pad of terminal until solder flows.
CAUTION: To avoid damaging bus bar, remove soldering gun or Iron as soon as the solder flows.
8. Start the vehicle, turn heater rear window on, and leave it on for five minutes. Inspect terminal and apply Grid Repair Compound D8AZ-19562- A (ESB-M4J58-A) or equivalent to the required area.