Chrysler 300M Service Manual page 298

8G - 4 HEATED GLASS
REAR WINDOW DEFOGGER GRID (Continued)
sured on the positive rear window grid bus bar, then
the grid line is bad. The break in the grid can be
found by moving the probe along the line until the
voltage changes. The area where the voltage changes
is where the open circuit is.
Fig. 4 GRID LINE TEST
1 - VOLTAGE FEED A
2 - BUS BARS
3 - REAR WINDOW DEFOGGER
4 - MIDPOINT C
5 - GROUND B
6 - VOLTMETER
7 - REAR SHELF
8 - CHMSL TRIM COVER
STANDARD PROCEDURE - REAR WINDOW
DEFOGGER GRID REPAIR
The repair of the grid lines or the terminal is pos-
sible using the Mopar Repair Package or equivalent.
(1) Mask the repair area so conductive epoxy can
be extended onto the line or the bus bar (Fig. 5).
Fig. 5 GRID LINE REPAIR
1 - BREAK
2 - GRID LINE
3 - MASKING TAPE
(2) Follow the instructions in the repair kit for
preparing the damaged area.
(3) Remove the package separator clamp and mix
the plastic conductive epoxy thoroughly. Fold in half
and cut the center corner to dispense the epoxy.
(4) For grid line repair, mark off the area to be
repaired with masking tape or a template (Fig. 5).
(5) Apply conductive epoxy through the slit in the
masking tape. Overlap both ends of the break by 19
mm (3/4 inch).
(6) For a terminal or pigtail replacement, mask
adjacent areas so the epoxy can be extended onto the
line as well as the bus bar. Apply a thin layer of
epoxy to the area where the terminal was fastened
and to the adjacent line.
(7) Apply a thin layer of conductive epoxy on the
terminal and place terminal on desired location. To
prevent the terminal from moving while the epoxy is
curing, it must be wedged or clamped.
(8) Carefully remove the masking tape from the
grid line.
CAUTION: Do not allow the glass surface to exceed
204°C (400°F), glass may fracture.
(9) Allow epoxy to cure 24 hours at room tempera-
ture or use a heat gun with a 260°-371°C (500°-
700°F) range for 15
approximately 254 mm (10 inches) from the repaired
area.
(10) After the conductive epoxy is properly cured
remove the wedge from the terminal and check the
rear window defogger operation. Do not attach the
connectors until curing is complete.
WARNING: REPAIR KIT MAY CAUSE SKIN OR EYE
IRRITATION. CONTAINS EPOXY RESIN AND AMINE
TYPE HARDENER, HARMFUL IF SWALLOWED.
AVOID CONTACT WITH SKIN AND EYES. FOR SKIN,
WASH AFFECTED AREAS WITH SOAP AND WATER.
DO NOT TAKE INTERNALLY. IF TAKEN INTER-
NALLY, INDUCE VOMITING; CALL A PHYSICIAN
IMMEDIATELY. IF IN CONTACT WITH EYES, FLUSH
WITH PLENTY OF WATER. USE WITH ADEQUATE
VENTILATION. DO NOT USE NEAR FIRE OR FLAME.
CONTENTS CONTAIN 3 PERCENT FLAMMABLE
SOLVENTS.
KEEP OUT OF REACH OF CHILDREN.
minutes. Hold the
LH
gun