I installed a new stereo to my 67 400 convertible and left the wires hanging to test before I secured them neatly up under the dash. Everything was working perfectly. When I started securing the older wires under the dash I kept blowing the 20 Amp fuse for the Hazard/lighter/clock circuit. I totally isolated and disconnected all the new stereo wiring from the fuse block block and still I blow these 20 amp fuses. After looking around and testing with a multi-meter for 4-6 hours I could not find the problem, but I did find that over the years prior to me owning this car there had been some wiring modifications. So I figured it was time to replace the whole system.

So my questions are, has anyone totally replaced their wiring completely? Who has the best quality to get a kit from? And is it better to have an automotive electrician wire it in verses someone who has not done this type of extensive work before (like me)?

All other systems including the power top and electric windows operate normally.

thanks for your suggestions.