Operation By Lighting Switch

With lighting switch in 1ST or 2ND position (or if auto light system is activated), BCM receives input signal requesting parking, license plate, side marker and tail lamps to illuminate. This input signal is communicated to IPDM E/R across CAN communication lines. CPU (located in IPDM E/R) controls tail lamp relay coil, which when energized, directs power:

through IPDM E/R terminal 22
to front side marker lamp LH terminal 1
to clearance lamp LH terminal 2
to license plate lamp LH terminal 1
to rear combination lamp LH terminal 1
to rear combination lamp control unit terminal 2
to front side marker lamp RH terminal 1
to clearance lamp RH terminal 2
to license plate lamp RH terminal 1
to rear combination lamp RH terminal 1.

Ground is supplied at all times

to front side marker lamp LH terminal 2
through grounds E2, E50 and E51
to clearance lamp LH terminal 3
through grounds E21, E50 and E51
to license plate lamp LH terminal 2
through grounds B15 and B45
to rear combination lamp LH terminal 2
through grounds B15 and B45
to front side marker lamp RH terminal 2
through grounds E21, E50 and E51
to clearance lamp RH terminal 3
through grounds E21, E50 and E51
to license plate lamp RH terminal 2
through grounds B15 and B45
to rear combination lamp RH terminal 2
through grounds B203 and B210
to rear combination lamp control unit terminal 7
through grounds E21, E50 and E51.

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