Function Test; Defogger Wire Repair - Honda Civic 2002-2003 Service Manual

Rear Window Defogger
Function Test
NOTE:
• Be careful not to scratch or damage the defogger
wires with the tester probe .
• Before testing, check the No. 11 130AI fuse in the
under-hood fuse/relay box and No. 14110AI fuse in
the under-dash fuse/relay box.
1. Check for voltage between the vertical dividers and
body ground with the ignition switch and defogger
switch ON.
There should be voltage as shown.
• If there is no voltage, check for:
- faulty defogger relay.
- an open in the BLK, BLK/YEL, or YEL/BLK wire.
- faulty heater control panel.
• If there is battery voltage, go to step 2.
B A
6V
2. Check for continuity between the negative terminal
IBI and body ground.
If there is no continuity, check for:
• an open in the BLK wire.
Poor body ground at the window antenna coil
mounting bolt.
3. Touch the voltmeter positive probe to the halfway
point of each defogger wire, and the negative
probe to the negative terminal.
There should be about 6 V with the ignition switch
and the defogger switch ON.
• If the voltage is as specified, the defogger wire is
OK.
• If the voltage is not as specified, repair the
defogger wire.
- If it is more than 6 V, there is a break in the
negative half of the wire.
- If it is less than 6 V, there is a break in the
positive half of the wire.
22-106
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 IAI
with fine steel wool, then clean it with alcohol.
A
c
2. Carefully mask above and below the broken portion
of the defogger wire IBI with transparent tape ICI.
3. Mix the silver conductive paint thoroughly. Using a
small brush, apply a heavy coat of paint extending
about 1/8 inch on both sides of the break. Allow 30
minutes to dry.
4. Check for continuity in the repaired wire.
5. Applya second coat of paint in the same way. Let it
dry 3 hours before removing the tape.