Headlamp Leveling Motor (Export): Operation
WARNING: This page is about a different car, the 2006 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
With the push button of the headlamp leveling switch control, voltage is adjusted at the headlamp leveling switch (rheostat). This signals the headlamp leveling motors to adjust the vertical headlamp beam pattern accordingly. Headlamps must be ON, and ignition in the ON or RUN position, in order for the leveling system to function.