Hey guys, I'm having some problems with my 64 chevelle's headlights. It seems as though the switch is good and all wiring from what I can see looks fine, but both headlights suddenly went out. I'm guessing there's a short somewhere. My father-in-law has a 67 el camino in which he just upgraded to painless wiring and I'm wondering if his original harness from the firewall will fit so I can test it. Any suggestions?