4. Check Stop Lamp Switch Input Signal Circuit For Open And Short

1. Disconnect ECM harness connector.
2. Disconnect stop lamp switch harness connector.
3. Check harness continuity between ECM terminal 106 and stop lamp switch terminal 2.
   Fig 1: Identifying Stop Lamp Switch

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

   Refer to WIRING DIAGRAM .

   Continuity should exist. 

4. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO 6. CHECK STOP LAMP SWITCH .
2. NG: GO TO 5.