Check Rear Window Defogger Circuit

CHECK POWER SUPPLY CIRCUIT 1

Turn ignition switch OFF.
Disconnect rear window defogger connector.
Turn ignition switch ON.
Check voltage between rear window defogger connector and ground.

Fig 1: Identifying Voltage Between Rear Window Defogger Connector And Ground

G05221286

Courtesy of NISSAN MOTOR CO., U.S.A.

POWER SUPPLY CIRCUIT 1

Connector	Terminal (Wire color)		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
D104	1(W)	Ground	Rear window defogger switch ON.	Battery voltage
D104	1(W)	Ground	Rear window defogger switch OFF.	0

OK or NG

OK: GO TO 2.

NG: GO TO 3.

CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear window defogger connector D114 terminal 2 and ground.
  2 (B) - Ground : Continuity should exist.
  
  Fig 2: Identifying Continuity Between Rear Window Defogger Connector D114 Terminal 2 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
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.
CHECK REAR WINDOW DEFOGGER RELAY CIRCUIT
1. Turn ignition switch OFF.
2. Remove rear window defogger relay.
3. Check continuity between rear window defogger relay connector E13 terminal 5, 7 and rear window defogger connector D104 terminal 1.
  5 (B) - 1 (W) : Continuity should exist.
  
  7 (B) - 1 (W) : Continuity should exist.
OK or NG

OK: Check condition of harness and connector.

NG: Repair or replace harness.