Stop Lamp Does Not Operate

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK TAIL LAMP AND TURN SIGNAL LAMP
Make sure tail lamps and turn signal lamps is illuminated.

OK or NG
1. OK: GO TO 2.
2. NG: GO TO 6.
CHECK FUSE
Check fuse No.20 is blow out.

OK or NG
1. OK: GO TO 3.
2. NG: If fuse is blow out, be sure to eliminate cause of problem before installing new fuse.
CHECK INPUT SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between rear combination lamp control unit harness connector and ground.
  
  Fig 1: Voltage Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Voltage Between Rear Combination Lamp Control Unit Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace rear combination lamp control unit.
2. NG: GO TO 4.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Disconnect stop lamp switch connector.
2. Check voltage between stop lamp switch harness connector E210 terminal 1 (GY) and ground.
  1. 1 (GY) - Ground: Battery voltage.
OK or NG
1. OK: GO TO 5.
2. NG: Repair harness or connector.
Fig 3: Checking Voltage Between Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK STOP LAMP SWITCH CIRCUIT
1. Disconnect rear combination lamp control unit connector.
2. Check continuity between stop lamp switch harness connector E210 terminal 2 (P) and rear combination lamp control unit harness connector B65 terminal 3 (P).
  1. 2 (P) - 3 (P): Continuity should exist.
OK or NG
1. OK: Replace stop lamp switch.
2. NG: Repair harness or connector.
Fig 4: Checking Continuity Between Terminal 2 And Terminal 3
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK POWER SUPPLY CIRCUIT
1. Disconnect rear combination lamp control unit connector.
2. Check voltage between rear combination lamp control unit harness connector B65 terminal 1 (GY) and ground.
  1. 1 (GY) - Ground: Battery voltage.
OK or NG
1. OK: GO TO 7.
2. NG: Repair harness or connector.
Fig 5: Checking Voltage Between Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK GROUND CIRCUIT
Check continuity between rear combination lamp control unit harness connector B65 terminal 7 (B) and ground.
1. 7 (B) - Ground: Continuity should exist.
OK or NG
1. OK: GO TO 8.
2. NG: Repair harness or connector.
Fig 6: Checking Continuity Between Terminal 7 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK STOP LAMPS CIRCUIT
1. Disconnect rear combination lamp RH and LH connector.
2. Check continuity between rear combination lamp control unit harness connector B65 terminal 11 (W) and rear combination lamp LH harness connector B57 terminal 3 (W).
  1. 11 (W) - 3 (W): Continuity should exist.
3. Check continuity between rear combination lamp control unit harness connector B65 terminal 10 (BR) and rear combination lamp LH harness connector B57 terminal 4 (BR).
  1. 10 (BR) - 4 (BR): Continuity should exist.
  Fig 7: Checking Continuity Between Terminal 10 And Terminal 4
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between rear combination lamp control unit harness connector B65 terminal 9 (LG) and rear combination lamp RH harness connector B219 terminal 3 (LG).
  1. 9 (LG) - 3 (LG): Continuity should exist.
5. Check continuity between rear combination lamp control unit harness connector B65 terminal 8 (Y) and rear combination lamp RH harness connector B219 terminal 4 (Y).
  1. 8(Y)-4(Y): Continuity should exist.
OK or NG
1. OK: Replace rear combination lamp control unit or rear combination lamp, and then check if turn signal lamps is illuminated.
2. NG: Repair harness or connector.