Honda Civic Service Manual page 1676

Rear Window Defogger
Function Test
CAUTION: Bs careful nol to scralch or damage the defog-
ger wires with the tester probe,
'1. Check for voltage between the positive
terminal and
body ground with the ignition switch and defogger
switch ON.
There should be banery voltage.
. lf there is no voltage, check for:
- faulty defogger relay.
- faulty defogger switch.
an ooen in the BLK,/BLU wire.
. lf there is battery voltage, go to step 2.
POSITIVE TERMINAL
2. Check for continuity between the negative terminal
and body ground.
lf there is no continuity, check for an open in the
defogger ground wire.
Touch the voltmeter positive probe to the halfway
point of each defogger wire, and the negative probe
to the negative terminal.
There should be approximately 6 V with the ignition
switch and the defogger switch ON.
.
lf the voltage is as specified. the defogger wire is
oK.
. lf thevoltage is not as specified, repairthe defog-
ger wrre.
-
lf it is more than 6 V, there is
negative half of the wire.
-
l f i t i s l e s s t h a n 6 V , t h e r e i s
positive half of the wire.
a break in the
a b r e a k i n t h e
23-204
OPEN
?
Defogger Wire Repair
NOTE: To make an effective repair, the broken section
must be no longer than one inch.
1, Lightly rub the area around the broken section with
fine steel wool, then clean it with alcohol.
2.
Carefully mask above and below the broken portion
of the defogger wire with cellophane tape.
CELLOPHANE
TAPE
Using a small brush, apply a heavy coat of silver
c o n d u c t i v e p a i n t e x t e n d i n g a b o u t 1 / 8 " o n b o t h
sides of the break. Allow 30 minutes to dry.
NOTE: Thoroughly mix the paint before use.
Check for continuity in the repaired wire.
Apply a second coat of paint in the same way. Let it
dry three hours before removing the tape.