Tools Required
| • | GM P/N 12345345 The Rear Window Defogger Repair
Kit, or the equivalent |
Removal Procedure
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing
any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to
the vehicle or its components.
- Disconnect
the negative battery cables.
- Inspect the rear window defogger lines.
- Mark the grid line breaks on the outside of the window with a
grease pencil.
- Clean the grid line area to be repaired.
| • | Buff the grid line area with steel wool. |
| • | Wipe clean using a cloth dampened with alcohol. |
| • | Buff and clean the grid line area about 6 mm (0.25 in)
beyond each side of the break in the grid line. |
| • | Ensure that the glass is at room temperature. |
Installation Procedure
Notice: The grid line repair material must be cured with heat. To avoid heat
damage to the interior trim, protect the trim near the repair area where heat
is to be applied.
- Install the grid line repair template (2) or 2 strips of tape positioned
above and below the repair area. Use the repair template or the tape in order
to control the width of the repair area. Ensure that the die cut
metering slot (1) is the same width as the grid line, when the
template is used.
- Use a small brush (3)
in order to install the grid repair material at room temperature to the repair
area.
- Remove the template or the tape carefully.
- Hold the J 25070
25-30 mm (1-2 in)
from the repair area. Apply the heat at 260-370°C (500-700°F)
for 2-3 minutes. If a heat gun is not available, allow the
repair to air dry at an ambient temperature of 20-39°C
(70-90°F) for 24 hours.
- Connect the negative battery cables.
- Inspect the grid line repair area. If the repair appears discolored,
use a pipe cleaner or a fine brush in order to apply a coat of tincture of
iodine to the repair area. Allow the iodine to dry for about 30
seconds. Carefully wipe off the excess with a lint-free cloth.
- Test the defogger operation in order to verify the grid line repair.
Refer to A Diagnostic Starting Point
.
- Leave the grid area untouched for 24 hours.
