Driver Side Door Mirror Defogger Circuit Check

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door mirror (driver side) connector.
3. Turn ignition switch ON.
4. Check voltage between door mirror (driver side) connector and ground.
  
  Fig 1: Door Mirror (Driver Side) Connector & Ground Voltage Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Voltage Between Door Mirror (Driver Side) Connector & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG: Repair or replace harness.
CHECK DOOR MIRROR DEFOGGER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between door mirror (driver side) connector D2 terminal 1 and ground.
  1 (B) - Ground: Continuity should exist.
OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace harness.
Fig 3: Checking Continuity Between Door Mirror (Driver Side) Connector D2 Terminal 1 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK DOOR MIRROR DEFOGGER
1. Connector door mirror connector.
2. Check continuity between each door mirror connector D2 (driver side) terminal 1 and 2.
  1 - 2: Continuity should exist.
OK or NG
1. OK: Check the condition of the harness and the connector.
2. NG: Replace door mirror (driver side).
Fig 4: Checking Continuity Between Each Door Mirror Connector D2 (Driver Side) Terminal 1 & 2
Courtesy of NISSAN MOTOR CO., U.S.A.