Hi Stuart,
Thanks for tuning in to the ongoing investigation! There are no add-ons on the truck. I think that loose wire was originally from ignition switch to coil, as you say. It seems someone ran a new wire separately from switch to coil, and just let the old one dangle, so I think that problem is solved. However, I still seem to have an electrical flow issue. The main power line from battery goes to starter, then ammeter, then ignition switch, then coil. When I hook up the 6 volt and push the start peddle, the starter cranks but I don't see a draw on the ammeter. Should I? Coil, plugs, distributer cap, rotor and wires have all been replaced. I also tried jumping the ignition switch in case it was faulty, but no difference.

I'm about to really study the circuitry diagram from the manual, but am I correct in thinking that the power flow is battery-starter-ammeter-ignition switch-coil-distributer-plugs-ground? Is there anything else that could interfere? Thanks a 'mil,