Headlamps - High Beam

Voltage to the headlamp switch is available at all times through the following components:
- The HDLP SWITCH fuse
- CKT 1940(ORN)

When the headlamp switch is turned to the HDLP position, the headlamp power relay coil is energized through CKT 352 (WHT). A signal is sent to the Body control module (BCM) that the headlamps are switched on. The headlamp power relay coil is grounded through the following components:
1. The underhood fuse block
2. Pin F7 of connector C2
3. CKT 350 (BLK) to ground G102

The headlamp power relay supplies current to the following fuses:
- LT HDLP
- RT HDLP

The RH headlamp high beam bulb receives current through CKT 198 (DK BLU) from the RT HDLP fuse.

When the headlamp switch is in the HDLP position, the Body control module (BCM) removes the ground path to the relay coil of the following components:
- The headlamp grounding relay
- The DRL relay

Both relays return to the normally open position. The normally open contacts of the DRL relay allows current to the LH headlamp high beam bulb through CKT 711 (DK GRN/WHT)

Both headlamp high beam bulbs are grounded through the following components:
1. CKT 524 (PPL)
2. The underhood fuse block
3. The multifunction switch (high position)
4. The Body relay block to the headlamp grounding relay Because the relay is deenergized, the current flows through the following components:
1. The normally open contacts of the relay
2. The underhood fuse block
3. Through CKT 350 (BLK) to ground G102

A voltage signal is sent to the Body control module (BCM), through CKT 524 (PPL), to confirm proper high beam operation.