Operation By Lighting Switch

WARNING: This page is about a different car, the 2004 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

With the lighting switch in the 1st or 2nd position (or if the auto light system is activated), the BCM (Body Control Module) receives input signal requesting the parking, license plate, side marker and tail lamps to illuminate. This input signal is communicated to the IPDM E/R (Intelligent Power Distribution Module Engine Room) across the CAN communication lines. The CPU (Central Processing Unit) in the IPDM E/R controls the tail lamp relay coil, which when energized, directs power

through IPDM E/R terminal 22
to front side marker lamp LH terminal 1
to front combination lamp LH terminal 7
to license plate lamp LH terminal 1
to rear combination lamp LH terminal 3
to front side marker lamp RH terminal 1
to front combination lamp RH terminal 7
to license plate lamp RH terminal 1
to rear combination lamp RH terminal

Ground is supplied at all times

to front side marker lamp LH terminal 2
through grounds E17 and E43
to front combination lamp LH terminal 4
through grounds E17 and E43
to license plate lamp LH terminal 2
through grounds B5 and B103
to rear combination lamp LH terminal 4
through grounds B5 and B103
to front side marker lamp RH terminal 2
through grounds E17 and E43
to front combination lamp RH terminal 4
through grounds E17 and E43
to license plate lamp RH terminal 2
through grounds B5 and B103
to rear combination lamp RH terminal 4
through grounds B5 and B103.

With power and ground supplied, the parking, license plate, side marker and tail lamps illuminate.