Town Car V8-302 5.0L (1987)
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 10 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 than 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 Preparation
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-M1495-
A)
or equivalent, 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.
Tempo/Topaz - Escort
1988 Tempo/Topaz - Escort
36-86-6
Window, Rear-Defroster
36-86-6
