I have emailed you earlier asking for help to locate the breakers on a 66. i have since found them and what i thought would be a quick fix now has me stumped. As I stated before my issue stemmed from a short in a wire that runs to my dash lights. I know that this same breaker also controls the Horn and the Power seat. I assumed i would just remove the wire and be able to bypass the breaker to make sure i was working with the correct one an then perhaps replace the breaker. This is not the case. After I removed the wire from the breaker it is reading as a ground?? Any ideas what could make this happen? I haven’t done any wiring changes or mounted anything that could have cut into a wire. Just to give you the exact cause of the issue. I had a bulb on one of my gauges that was not working. I found out the the positive wire going to the bulb was loose and had come out. This wire touched the mounting for the gauges and thus caused the breaker to pop. I have unhooked all of the positive and negative wires going to the gauge to track it down but nothing changes.
As always. Thank you for your advice,
Hello Ken –
The Factory shop manual that you indicate that you have has all of the wiring diagrams shown in the rear section. Of course we can’t diagnose your issues from here but in the diagram you will see that the instrumentation lighting is first protected by a 6 amp fuse in the fuse box. This fuse will open this circuit and only this circuit in the event of a short to ground. The power originates in the headlamp switch through the dimmer rheostat and then to this fuse. The h/l sw. also has its own heavier circuit breakers to protect the headlamps and the park and running lights. If this 6amp fuse is blowing, a common location for a short is in the shift quadrant wiring located in the steering column.
The diagram should also show what other circuits are protected by the horn and power seat circuit breakers. If the wiring in the vehicle has not been interfered with in a negative way the wiring diagram along with the proper test equipment should help direct you or your technician to the cause of your problems. If you cannot locate these necessary wiring schematics please contact us further and we can make them available for you.