Headlamp Switch In ON Position

When the headlamp switch is in the ON position, the A3 circuit from the Power Distribution Center (PDC) connects to circuit L2. The L2 circuit is spliced and connects from the headlamp switch to the junction block, Body Control Module (BCM), beam select switch (low beam side), and the headlamp delay relay

Circuit L4 connects from the beam select switch and the junction block. This is the feed to the fuses that power the low beam headlamps.

Circuits L43 and L44 connect to the junction block, and power the low beam headlamps. Circuit L43 supplies power to the left headlamp. Circuit L44 supplies power to the right headlamp. The L43 and L44 circuits each have separate fuses in the junction block. The L43 circuit is protected by a 15 Amp fuse in cavity 15, and L44 is protected by a 15 Amp fuse in cavity 16.

When the operator selects high beam operation, with the turn signal stalk of the multi-function switch, circuit A3 connects to the L3 circuit. Circuit L3 powers the fuses in the junction block for high-beam operation.

Circuit L33 is used for left high beam operation and is protected by a 15 Ampfuse located in cavity 11 of the junction block. Circuit L34 is used for the right high beam and is protected by a 15 Amp fuse located in cavity 12 of the junction block.

On vehicles equipped with Daytime Running Lamps (DRL) circuit L34 is spliced and provides an input to the DRL module.