I have a 1993 Dodge Dakota (V8). My headlights go off & on for & no apparant reason. All other lights (dash, interior, running lights, taillights, brake lights & flashers work). The truck can be on smooth or bumpy terrain, it doesn't matter. They will go out from a few seconds to up tp 5 minutes (so far). I have no ideas of what to look for. PLEASE HELP!