Filament Check

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.

When measuring voltage, wrap tin foil around the top of the negative probe. Then press the foil against the wire with your finder.

Fig 1: Measuring Filament Voltage
Courtesy of NISSAN MOTOR CO., U.S.A.
Attach probe circuit tester (in Volt range) to middle portion of each filament.

Fig 2: Attaching Probe Circuit Tester To Middle Portion Of Each Filament
Courtesy of NISSAN MOTOR CO., U.S.A.
If a filament is burned out, circuit tester registers 0 or battery voltage.
To locate burned out point, move probe to left and right along filament. Test needle will swing abruptly when probe passes the point.

Fig 3: Checking Filament Condition
Courtesy of NISSAN MOTOR CO., U.S.A.