CHASSIS ELECTRICAL
-
Rear Window Defogger
54-203
L
L-J
c
Normal characteristic curve
Voltage
j\
Positive
Printed heater line
terminal
Negative
terminal
Abnormal characteristic curve
Voltage
Qj
(
(
r”!“Yui;
Positive
terminal
Printed heater line Negative
terminal
216Y332
Break
Tape
\
Conductive
paint
216Y333
16FO167
00002409
ON-VEHICLE SERVICE
THE PRINTED-HEATER LINES CHECK
(1) Run engine at 2,000 rpm. Check heater element with bat-
tery at full.
(2) Turn ON rear window defogger switch. Measure heater
element voltage with circuit tester at rear window glass
center A.
Condition good if indicating about 6 V.
(3) If 12 V is indicated at A, there is a break in the negative
terminals from A.
Move test bar slowly to negative terminal to detect where
voltage changes suddenly (0 V).
(4) If 0 V is indicated at A, there is a break in the positive
terminals from A. Detect where the voltage changes sud-
denly (12 V) with the same method described.
THE PRINTED-HEATER LINES REPAIR
REQUIRED MATERIALS
l Thinner
l Tape
l Lead-free gasoline
l Fine brush
l Conductive paint
(1) Clean disconnected area with lead-free gasoline. Tape
along both sides of heater element.
(2) Mix conductive paint thoroughly. Thin the required amount
of paint in a separate container with a small amount of
thinner and paint break three times at 15 minute intervals.
(3) Remove tape and leave for a while before use (circuit
complete).
(4) When completely dry (after 24 hours) finish exterior with
a knife.
Caution
Clean glass with a soft cloth (dry or damp) along defog-
ger heater element.
REAR WINDOW DEFOGGER SWITCH
(1) Remove rear window defogger switch from the meter bezel.
(Refer to
P.54-109.)
(2) Operate the switch and check the continuity between the
terminals.
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