Function Test; Defogger Wire Repair - Acura 3.5 RL Manual

Rear Window Defogger

Function Test

CAUTION: Be careful not to scratch 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 battery voltage.
• If there is no voltage, check for:
faulty defogger relay,
faulty defogger switch.
faulty defogger coil.
an open in the YEL/BLU wire.
• If there is battery voltage, go to step 2.
NEGATIVE TERMINAL
2. Check for continuity between the negative terminal
and body ground.
If there is no continuity, check for an open in the
defogger ground wire.
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.
POSITIVE TERMINAL

Defogger Wire Repair

NOTE: To make an effective repair, the broken section
must be no longer than 1 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.
BROKEN WIRE
3. Using a small brush, apply a heavy coat of silver
conductive paint extending about 1/8" on both
sides of the break. Allow 30 minutes to dry.
NOTE: Thoroughly mix the paint before use.
4. Check for continuity in the repaired wire.
5. Apply a second coat of paint in the same way. Let it
dry 3 hours before removing the tape.
CELLOPHANE
TAPE