Suzuki Wagon R Manual page 905

8D-14 WINDOWS, MIRRORS, SECURITY AND LOCKS
REAR WINDOW DEFOGGER
DEFOGGER SWITCH (IN BLOWER FAN AND DEFOGGER
SWITCH)
REMOVAL
Remove blower fan and defogger switch. Refer to BLOWER FAN
& DEFOGGER SWITCH REMOVAL in Section 1A.
INSPECTION
Check defogger switch for continuity.
If switch has no continuity between terminals, replace.
INSTALLATION
Reverse removal procedure for installation.
DEFOGGER WIRE
CAUTION:
When cleaning rear window glass, use a dry cloth to wipe it
along wire direction.
And also do not use detergent or abrassive-containing glass
cleaner. Otherwise, wire may be damaged.
NOTE:
When measuring wire voltage, use a tester with negative probe
(3) wrapped with a tin foil (2) which should be held down on
wire (1) by finger pressure.