Rear Window Defogger - Subaru 2003 LEGACY Service Manual

GLASS/WINDOWS/MIRRORS

18.Rear Window Defogger

A: INSPECTION
1) Turn ignition switch to ON.
2) Turn defogger switch to ON.
3) Wrap tips of tester pins with aluminum foil to
avoid damage to heat wire.
( 1 )
(1) Tester probe
(2) Tin foil
(3) Heat wire
(4) PRESS
4) Measure voltage at wire center (A) with DC volt-
meter.
Standard voltage:
Approx. 6 volts
Voltage
Approx. 6 V
Approx. 12 V or 0 V
NOTE:
• If the measured value is 12 volts, heat wire is
open between wire center and positive (+) end.
• If zero volt, heat wire is open between wire cen-
ter and ground.
5) Apply positive lead of voltmeter to positive termi-
nal of voltmeter, and then move negative lead
along the wire up to the negative terminal end. If
voltage changes from zero to several volts during
movement of lead, heat wire is open at the voltage
change point.
REAR WINDOW DEFOGGER
( 4 )
( 3 )
( 2 )
GW-00126
( A )
GW-00127
Criteria
OK
Broken
GW-32
B: REPAIR
1) Clean broken portion with alcohol or white gaso-
line.
2) Mask both side of wire with thin film.
3) Apply conductive silver composition (DUPONT
No. 4817) to broken portion.
( 2 )
(1) Broken portion
(2) Masking thin film
(3) Conductive silver composition
(4) Broken wire
4) After repair, check wire.
( 1 )
( 4 )
( 3 )
GW-00128