DEFOGGER - REAR WINDOW
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:08PM
ARTICLE BEGINNING
1993 ACCESSORIES & EQUIPMENT
Volkswagen Rear Window Defoggers
Volkswagen; Cabriolet, Corrado SLC, EuroVan,
Fox, Golf, GTI, Jetta, Passat
DESCRIPTION & OPERATION
Ignition must be on for rear window defogger to operate.
Power to control switch is applied through fuse in fuse block. An
indicator light in the control switch comes on when the defogger is
turned on. Control switch also provides power to heating element in
both outside mirrors.
TROUBLE SHOOTING
DEFOGGER DOES NOT WORK
Check for blown fuse, defective defogger switch, open wiring
or poor connections. Check for breaks in rear window defogger grid.
See FILAMENT TEST under TESTING.
INDICATOR LIGHT DOES NOT WORK
Check for burned bulb, blown fuse, open wiring or poor
connection.
TESTING
SYSTEM TEST
Ensure and control switch are okay. Turn ignition and control
switch on. After a few minutes, feel glass for warmth. If glass is not
warm, use a test light to check for battery voltage at grid feed wire.
If no voltage is present, check control switch.
FILAMENT TEST
1) To locate breaks in grid filaments, connect test light
negative lead to ground side of grid. Touch opposite (positive) side
of grid with test light probe. If test light glows, grid line is okay.
Test light will glow dimmer as probe is moved toward ground side of
grid.
2) If test light does not glow, grid line is broken. To
locate break, move probe along grid line toward ground side of heat
grid until test light glows, indicating area of damage.
WIRING DIAGRAMS
