YH4
GRAND
VITARA
1. Heat wire
2. Tin foil
3. Tester probe
1. Voltmeter
At center
Good
Broken
wire
broken
wire
8D-16 WINDOWS, MIRRORS, SECURITY AND LOCKS
REAR WINDOW DEFOGGER (IF EQUIPPED)
INSPECTION
DEFOGGER SWITCH
Check for continuity between terminals at each switch position as
shown below.
If check result is not as specified, replace switch.
DEFOGGER WIRE
NOTE:
When cleaning rear window glass, use a dry cloth to wipe it
along wire direction.
When cleaning glass, do not use detergent or abrasive-con-
taining glass cleaner.
When measuring wire voltage, use a tester with negative
probe wrapped with a tin foil which should be held down on
wire by finger pressure.
1) Checking wire damage
a. Turn main switch ON.
b. Turn defogger switch ON.
c. Use a voltmeter to check voltage at the center of each heat
wire, as shown.
Voltage
Criteria
Approx. 5 V Good (No break in wire)
Approx. 10 V or 0 V Broken wire
If measured voltage is 10 V, wire must be damaged between
its center and positive end. If voltage is zero, wire must be
damaged between its center and ground.
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