Originally posted by FMXhellraiser
Pauls suggestion is a good one. My 66 is doing the same exact thing. Either that or one has it's brights on and the other doesn't which is what I thought it was at first but when I push the brights on the bright one goes a tad bit brighter and opens a LITTLE bit more but hardly can tell. I still haven't fixed the problem and may wait until I get a new wiring harness since the wires are eaten up and sometimes the headlights go out.
Do yourself a favor, check the headlights and make shure they cross refrence eachother or are the same part number if the same manufacture. if the dim 1 is a diffrent part number than the bright, theres your problem, simpley a light that is not as bright. and as for the lights going out, may indicate a faulty dimmer.