Suzuki WagonR+ RB310 Service Manual page 2926

At center
Good
Broken
wire
Broken
wire
Several volts
0 volt
WINDOWS, MIRRORS, SECURITY AND LOCKS 8D-15
INSPECTION
1) Checking wire damage
a. Turn main switch ON.
b. Turn defogger switch ON.
c. Check voltage at the center of each heat wire, as shown.
Voltage
Approx. 5 V
Approx. 10 V or 0V
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.
2) Locating damage in wire
a. Touch voltmeter positive (+) lead to heat wire positive termi-
nal end.
b. Touch voltmeter negative (–) lead with a foil strip to heat wire
positive terminal end, then move it along wire to the negative
terminal end.
c. The place where voltmeter fluctuates from zero to several
volts is where there is damage.
NOTE:
If heat wire is free from damage, voltmeter should indi-
cate 12 V at heat wire positive terminal end and its indica-
tion should decrease gradually toward zero at the other
terminal (ground).
Criteria
Good (No break in wire)
Broken wire