Lexus LS400 (2000 year). Manual - part 9
BE0123
At Center
BE0124
0 Volt
Several
Volts
Broken
Wire
BE0150
Repair Point
Broken
Wire
Marking Tape
BE0151
BE–118
–
BODY ELECTRICAL
DEFOGGER SYSTEM
1981
(a)
Turn the ignition switch ON.
(b)
Turn the defogger switch ON.
(c)
Inspect the voltage at the center of each heat wire, as
shown.
Voltage
Criteria
Approx. 5V
Okay (No break in wire)
Approx. 10V or 0V
Broken wire
HINT:
If there is approximately 10 V, the wire is broken between the
center of the wire and the positive (+) end. If there is no voltage,
the wire is broken between the center of the wire and ground.
(d)
Place the voltmeter positive (+) lead against the defogger
positive (+) terminal.
(e)
Place the voltmeter negative (–) lead with the foil strip
against the heat wire at the positive (+) terminal end and
slide it toward the negative (–) terminal end.
(f)
The point where the voltmeter deflects from zero to sever-
al V is the place where the heat wire is broken.
HINT:
If the heat wire is not broken, the voltmeter indicates 0 V at the
positive (+) end of the heat wire but gradually increases to about
12 V as the meter probe is moved to the other end.
7.
IF NECESSARY, REPAIR DEFOGGER WIRE
(a)
Clean the broken wire tips with a grease, wax and silicone
remover.
(b)
Place the masking tape along both sides of the wire to be
repaired.
(c)
Thoroughly mix the repair agent (Dupont paste No.4817).
(d)
Using a fine tip brush, apply a small amount to the wire.
(e)
After a few minutes, remove the masking tape.
(f)
Allow the repair to stand at least 24 hours.