OK.. So i disconnected headlight Hi beam at the fender well terminal block...turned on low beam and got 8.5v coming back on the Hi beam wire from the headlight.... tried each light separately ... No Cigar. Then ran ground from driver headlight to pass headlight then on to battery negative. No Cigar! Checked the wire positions on the headlights .. even switched one around ... no help just worser. So if this is a grounding issue can I go to each grounding point on the truck and jumper them all back to the Battery ground strap ... would I eliminate the elusive ground problem... and then work backwards to find the culprit? Dimmer switch is new, wiring is new and truck has added turn signals and truck has never been driven in the rain.
