Illumination Signal Check

WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

TAIL LAMP OPERATION CHECK
When lighting switch turned 1st or 2nd position, does tail lamp illuminate?

YES or NO

Yes : GO TO 2.

No : Go to tail lamp trouble diagnosis. Refer to PARKING LICENSE PLATE AND TAIL LAMPS .
ILLUMINATION SIGNAL CHECK
1. Disconnect NAVI control unit connector.
2. Check voltage between NAVI control unit and ground.
  
  Fig 1: Checking ILLUMINATION SIGNAL Voltage Between NAVI Control Unit And Ground (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking ILLUMINATION SIGNAL Voltage Between NAVI Control Unit And Ground (2 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : Replace NAVI control unit.

NG : Check harness for open or short between NAVI control unit and IPDM E/R. Refer to WIRING DIAGRAM -ILL "