Chrysler Conquest 1988 Service Manual page 507

REAR WINDOW DEFOGGER
- Printed Heater Lines
8-257
Voltage
Normal characteristic curve
Positive Printed heater line
terminal
Negative
terminal
Voltage
Abnormal characteristic curve
12v-
&
1 Open-circuit
6V-
: point
ov
I
i
Positive Printed heater line
terminal
Negative
terminal
16Y332
Alignment holes
Decal
/'
Masking tape
16F65C
PRINTED HEATER LINES
NOBPKAA
INSPECTION
1. The printed heater lines should be tested while the engine
is running at 2,000 rpm and the battery is being charged.
2. Turn the defogger switch to the "ON" position, and use
voltmeter to measure the voltage of each printed heater
line at the
rear window glass center point
"A".
3. If all of the heater lines indicate approjtimately 6V, the rear
window printed heater lines are functioning properly.'
4. If a voltage of 12V is indicated at point "A", the heater line
is broken between point "A" and the negative (--) terminal.
Move the test probe gradually toward the negative (--)
terminal, and search for the place where there is a sudden
change in the voltage (to OV).
5. This place where the voltage suddenly changes indicates
the location of the broken heater line.
6. If OV is indicated at point "A", the heater line is broken
between point "A" and the positive (+) terminal. Find the
point where there is a sudden change in the voltage (to
12V), as described in step 4. above.
REPAIR
1. Prepare the following items:
l
Conductive paint
l
Paint thinner
l
Masking tape, decal, etc.
l
Unleaded gasoline
l
Thin brush
Wipe the glass adjacent to the broken heater line, clean
with unleaded gasoline, and bond a decal or masking tape
as shown.
2. Shake the electroconductive paint container well, and
remove the amount of paint needed. Dilute it with a small
quantity of paint thinner, and apply three coats with the
brush at intervals of about 15 minutes.
3. Remove the tape or decal and leave the repaired defogger
unused for a while before supplying power.
4. For a better finish, scrape away excess deposits with a
knife after drying is complete (one day later).
Caution
After repair, clean the glass with a soft dry shop towel
or wipe along the printed heater line with a slightly
moistened shop towel.