Headlamp Leveling (Export)
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The IGN 1 10 A fuse in the engine wiring harness junction block supplies battery positive voltage to the to both the headlamp leveling switch and the headlamp leveling motors through different terminals in the junction block. The headlamp leveling switch varies the amount of current to the actuators causing them to move simultaneously up or down to each selected position. Ground for the actuators and the switch are supplied by G100.