Check Rear Window Defogger Circuit

1. Turn ignition switch OFF.
2. Disconnect rear window defogger connector.
3. Turn ignition switch ON.
4. Check voltage between rear window defogger connector and ground.
   TERMINALS VOLTAGE CHART
   
   

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

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

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

OK or NG 

OK : GO TO 2.

NG : GO TO  3.

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 "

1. If filament is OK, check condition of harness and connector.
2. If filament is NG, repair filament.

NG : Repair or replace harness.

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. 

   Fig 3: Identifying Continuity Between Rear Window Defogger Relay Terminal 5, 7 And Rear Window Defogger Terminal 1

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

OK or NG 

OK : Check condition of harness and connector.

NG : Repair or replace harness.