Heated Window Grid Wire Repair
Materials
| Name | Specification |
|---|---|
| Motorcraft® Ultra-Clear Spray Glass Cleaner ZC-23 | ESR-M14P5-A |
| Motorcraft® Rear Window Defroster Repair PM-11 | WSB-M4J58-B |
Repair
- 1.WARNING: Before beginning any service procedure in this service information, refer to Safety Warnings in General Information. Failure to follow this instruction may result in serious personal injury.
Refer to: Health and Safety Precautions
- 2.NOTE: The grid line material is not embedded into the glass, but is baked to the glass surface and consequently can be scraped off. An undamaged grid line has small ridges that project above the surface of the glass and can easily be felt when running a fingernail across them. Grid lines that have been razor bladed will feel smooth when a fingernail is dragged across the affected area. Inoperative lines may appear to the eye to be undamaged due to residue remaining on the glass and require diagnosis with a voltmeter or 12V test lamp.
Bring the vehicle up to a room temperature of at least 16° C (60.8° F) or above.
Material: Motorcraft® Rear Window Defroster Repair / PM-11 (WSB-M4J58-B)
- 3.NOTE: Do not use scrapers, sharp instruments or abrasive window cleaners on the interior surface of the rear window glass as this may cause damage to the grid lines.
Clean the entire grid line repair area with glass cleaner and 0000 steel wool to remove all dirt, wax, grease, oil or other foreign material.
Material: Motorcraft® Ultra-Clear Spray Glass Cleaner / ZC-23 (ESR-M14P5-A)
- 5.
- Using a polypropylene film fine line tape, mask the area directly above and below the grid break extending the tape 26 mm (1.0236 in) beyond the concern area in both directions. The break area should be at the center of the mask.
- Polypropylene Film Fine Line Tape (Commercially available).
- 6.NOTE: If the brown layer is not broken or missing, apply only the silver grid repair compound to the break. If both the brown and silver layers of the grid are broken or missing, apply a coating of the lacquer touch-up paint across the break in the grid line prior to applying the rear window defroster repair compound. Do not overlap the silver grid line with the paint. Several applications may be necessary to achieve a color match.
- Polypropylene Film Fine Line Tape (Commercially available)
- Motorcraft® Lacquer Touch-Up Paint (match color to exterior grid wire) (Part Number PMP-19500-XXXX) (Ford Specification ESR-M2P100-C)
NOTE: Allow at least 5 minutes of drying time between applications for the touch-up paint or the silver repair coating. Applying fewer coats or not allowing adequate drying time between coats produces repaired resistance that is greater than Original Equipment Manufacturer (OEM) resistance, resulting in poor defrost performance and excessive localized heating.- Motorcraft® Lacquer Touch-Up Paint (match color to exterior grid wire) (Part Number PMP-19500-XXXX) (Ford Specification ESR-M2P100-C)
Apply the repair coating to the grid break area in several smooth, continuous strokes. Extend the silver repair coating at least 6.35 mm (0.25 in) on both sides of the break area. Apply a minimum of 6 applications of the grid repair compound.
Material: Motorcraft® Rear Window Defroster Repair / PM-11 (WSB-M4J58-B)
- 7.NOTE: The repair coating air dries in approximately one minute and can be energized after 5 minutes. Optimum adhesion occurs after approximately 24 hours.
Allow the repair area to dry completely and remove the mask.