It could be the adjustment for the headlight height angle. It is vacuum operated. It may be that a hose or two have become disconnected. Rotating the wheel should raise and lower the headlights.
Typically the dash light rheostat is a knob on the instrument cluster. You can remove the instrument cluster and do a little R&R on the rheostat (clean the contacts) and make it work or replace it. They are about $25.
Last edited by Robby Ackerman; 02-01-2003 at 11:44 AM.