Drop the switch out of the dash so you can get to the wires, and use a jumper lead to bypass the headlight circuit. If the headlights still won't come on, the problem is probably at the dimmer switch. That's a pretty common failure on floor-mounted dimmers because they are in a pretty hostile environment under the floorboard.
Jerry

Last edited by Hotrod Lincoln; 07/03/2009 9:11 PM.
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