On my 64 GMC, there is a toggle switch that somebody has put in, in the past. Its purpose was to jump a wire around the ignition switch to keep the ignition alive because the faulty switch would quit from time to time, but also would keep the engine running all the time when the switch was turned off too. I will be replacing the switch one day to fix this. Dont know if this pertains to you or not, but my .02 worth.
I might add also, my latest acquisition, a 1964 GMC 305 long bed, comes to me with a few electrical gremlins. First thing I will do before any trouble shooting is to check to see if it has its engine ground straps as well as body ground straps and will also add a hood to body ground strap for the park and turn signal lights in the hood that seem to be working off and on, more off though.
Steve
Last edited by sstock; 11/07/2019 1:11 PM.
1953 Chevrolet 3100261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY GalleryVideo of the 261 running1964 GMC 1000305 Big Block V6, sm420, the next cab off restoration
