Check Rear Window Defogger Circuit

REAR WINDOW DEFOGGER


Check Rear Window Defogger Circuit

1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between rear window defogger connector and ground.










OK or NG
OK - GO TO 2.
NG - GO TO 3.
2.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger connector.
3. Check continuity between rear window defogger connector and ground.










OK or NG
OK - Check filament. Refer to Check Filament
- If filament is OK, check condition of harness and connector.
- If filament is NG, repair filament.
NG - Repair or replace harness between rear window defogger and ground.
3.CHECK HARNESS CONTINUITY 1
1. Turn ignition switch OFF.
2. Disconnect condenser and rear window defogger connector.
3. Check continuity between condenser and rear window defogger connector.










OK or NG
OK - GO TO 4.
NG - Replace condenser.
4.CHECK HARNESS CONTINUITY 2
1. Remove rear window defogger relay.
2. Check continuity between rear window defogger relay connector and condenser connector.










OK or NG
OK - Check the condition of harness and connector.
NG - Replace or repair harness between rear window defogger relay and condenser.