Voltage is supplied to the Headlamp leveling switch through the IGN E fuse in the underhood fuse block (CKT 639 PNK). The headlamp leveling actuators are also powered by the same fuse but from a different terminal location in the underhood fuse block than the headlamp leveling switch (CKT 639 PNK).

The headlamp leveling switch varies the amount of current to the actuators causing them to move simultaniously up or down to each selected position (CKT 189 DK GRN). Grounds for the actuators and switch are supplied through CKT 1050 (BLK).