The low beam headlights and dash lights in my 68 Bird dont work..I have replaced the light switch itself, and the dimmer switch..with the high beams on 3 of the 4 lamps light( outside passenger doesn't),but only on high beam, and no dash lights anytime...I have had the dash apart and tested the harness on the back of the instruments, and have no power there except the turn signal indicators and the idiot lights...so, as I am officially lost, **scratches head** ,any experience would be great