2. Check Stop Lamp Switch Power Supply Circuit

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect stop lamp switch harness connector.

Fig 1: Identifying Stop Lamp Switch
Courtesy of NISSAN MOTOR CO., U.S.A.
Check voltage between stop lamp switch terminal 1 and ground with CONSULT-II or tester.

Fig 2: Checking Voltage Between Stop Lamp Switch Terminal 1 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Voltage: Battery voltage

OK or NG

OK: GO TO 4. CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT .
NG: GO TO 3.