Driver Side Door Mirror Defogger Circuit Check

WARNING: This page is about a different car, the 2004 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect door mirror (driver side) connector.
Turn ignition switch ON.

Check voltage between door mirror (driver side) connector and ground.

VOLTAGE CHECK CHART

Connector	Terminal (Wire color)		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
D2	1 (L/B)	Ground	Rear window defogger switch ON	Battery voltage
D2	1 (L/B)	Ground	Rear window defogger switch OFF	0

Fig 1: Checking Voltage Between Door Mirror (Driver Side) Connector And Ground

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

OK or NG

OK: GO TO 2.
NG: Repair or replace harness between fuse block (J/B) and door mirror (driver side).

CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between door mirror (driver side) connector D2 terminal 5 and ground.
  5 (B) - Ground: Continuity should exist.
  
  Fig 2: Checking Continuity Between Door Mirror (Driver Side) Connector D2 Terminal 5 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace harness between door mirror (driver side) and ground.
CHECK DOOR MIRROR DEFOGGER
1. Connector door mirror connector.
2. Check continuity between door mirror connector D2 (driver side) terminals 1 and 5.
  1 (L/B) - 5 (L/B): Continuity should exist.
  
  Fig 3: Checking Continuity Between Door Mirror Connector D2 (Driver Side) Terminals 1 And 5
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Check the condition of the harness and the connector.
2. NG: Replace door mirror (driver side).