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On-Vehicle Service
Cautions in Body Electrical System Servicing
Refer to "Cautions in Body Electrical System Servicing" in Section
8B.
Rear Window Defogger Switch Inspection
Refer to "Rear Defogger Switch Inspection" in Section 1A.
Rear Window Defogger Wire Inspection
NOTE:
• When cleaning rear window glass, use a dry cloth and
wipe it along heat wire (1) direction.
• When cleaning glass, do not use detergent or abrasive
containing glass cleaner.
• When measuring wire voltage, use a tester with nega-
tive probe (2) wrapped with a tin foil (3) which should
be held down on wire by finger pressure.
• Wire damage inspection.
a) Turn ignition switch ON.
b) Turn defogger switch ON.
c) Check voltage at the center (1) of each heat wire as shown
below.
If measured voltage is 10 V, wire must be damaged
between its center and positive end (5).
If voltage is 0 V, wire must be damaged between its center
and ground end (6).
Defogger wire voltage
Voltage
Approx. 4 – 6 V (2)
Approx. 9 – 11 V (3)
or 0 – 2 V (4)
X: Damage point
WINDOWS, MIRRORS, SECURITY AND LOCKS 8D-9
Criteria
Good (No break in wire)
Broken wire
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