Rear Window Defogger Circuit Check / For Roadster

WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.

REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT INSPECTION
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.
  
  Fig 1: Rear Window Defogger Connector & Ground Voltage Specifications Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Rear Window Defogger Connector & Ground Voltage Test
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 2.
- NG: GO TO 3.
REAR WINDOW DEFOGGER GROUND HARNESS INSPECTION
1. Turn ignition switch OFF.
2. Disconnect rear window defogger connector.
3. Check continuity between rear window defogger connector D203 terminal 2 and ground.
  - 2(B) - Ground: Continuity should exist
OK or NG
- OK: Rear window defogger circuit is OK.
- NG: Repair or replace harness.
Fig 3: Rear Window Defogger Connector D203 Terminal 2 & Ground Continuity Test
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect rear window defogger relay connector.
3. Check continuity between rear window defogger relay connector B34 terminal 5 and rear window defogger connector B202 terminal 1.
  - 5 (B/W) - 1 (B): Continuity should exist.
OK or NG
- OK: Check the condition of the harness and the connector.
- NG: Repair or replace harness.
Fig 4: Rear Window Defogger Relay Connector B34 Terminal 5 & Rear Window Defogger Connector B202 Terminal 1 Continuity Test
Courtesy of NISSAN MOTOR CO., U.S.A.