Check Stop Lamp Switch

WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Disconnect stop lamp switch connector.
2. Check voltage between stop lamp switch connector E210 terminal 1 (GY) and ground.
  1 (GY) - Ground : Battery voltage
  
  Fig 1: Identifying Voltage Between Stop Lamp Switch Connector E210 Terminal 1 (GY) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 2.

NG: Repair or replace harness between stop lamp switch and fuse.
CHECK STOP LAMP SWITCH OPERATION
Check continuity between stop lamp switch connector E210 terminal 1 and 2.

1 - 2 Brake pedal depressed : Continuity should exist.

Brake pedal not depressed : Continuity should not exist.

Fig 2: Identifying Continuity Between Stop Lamp Switch Connector E210 Terminal 1 And 2
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 3.

NG: Replace stop lamp switch.
CHECK STOP LAMP SWITCH GROUND CIRCUIT
1. Check continuity between stop lamp switch connector E210 terminal 2 (P) and Intelligent Key unit connector M34 terminal 26 (P/L).
  2 (P) - 26 (P/L) : Continuity should exist.
2. Check continuity between stop lamp switch connector E210 terminal 2 (P) and ground.
  2 (P) - Ground : Continuity should not exist.
  
  Fig 3: Identifying Continuity Between Stop Lamp Switch Connector E210 Terminal 2 (P) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: Stop lamp switch is OK.

NG: Repair or replace harness.