Operation By Lighting Switch

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 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 terminal 37 of the IPDM E/R
to front combination lamp LH terminal 5and 6 (with xenon bulb headlamp),
to front combination lamp LH terminal 5 (with halogen bulb headlamp),
to front combination lamp RH terminal 5 and 6 (with xenon bulb headlamp),
to front combination lamp RH terminal 5 (with halogen bulb headlamp),
to rear combination lamp LH terminal 2 and 5,
to rear combination lamp RH terminal 2 and 5,
to license plate lamp terminal 2,
Ground is supplied at all times
to front combination lamp LH terminal 1 (with xenon bulb headlamp),
to front combination lamp LH terminal 4 (with halogen bulb headlamp),
through grounds E17, E43 and F152, and
to front combination lamp RH terminal 1 (with xenon bulb headlamp),
to front combination lamp RH terminal 4 (with halogen bulb headlamp),
through grounds E17, E43 and F152, and
to front side marker lamp LH terminal 1 (with xenon bulb headlamp),
to front side marker lamp LH terminal 4 (with halogen bulb headlamp),
through body grounds E17, E43 and F152, and
to front side marker lamp RH terminal 1 (with xenon bulb headlamp),
to front side marker lamp RH terminal 4 (with halogen bulb headlamp),
through grounds E17, E43and F152,and
to rear combination lamp LH terminal 3 and 4
through grounds D105, B5, B6 and T14, and
to rear combination lamp RH terminal 3 and 4
through grounds D105, B5, B6 and T14, and
to license plate lamp terminal 1,
through grounds D105, B5, B6 and T14.

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