Bill........would it surprize you to learn that the starter motor will turn yer engine over WITHOUT the ignition switch ON???
Would it surprize you to learn you can start the engine without a starter motor??? as long as the ignition switch is ON??? It's called and armstrong starter (hand crank) You can also "tow-start".
Howsomevers; that does not address yer melted wiring harness. When you installed yer 12V-battery positive ground, you shorted-out yer internal 12V-alternator solid state diodes and let the smoke out thru the wires and melted the insulation. Alternators DEMAND negative ground. Take yer alternator into enny autoparts store for a "free" checkout. Simple, eh?
Unfortunately neither the Ford manuals ...nor... the I&T FO-4 manual show or describe a 12V-conversion. There are plenty of home-grown wiring diagrams for 12V-conversions. I like the 3-wire conversion that uses an "idiot-lite".
You definately need to change yer roundcan ignition coil to a real 12V-coil that uses NO resistors ever. Recommend the NAPA IC-14SB. ($15, cheap) ........Dell, a 12V advocate for the right reason
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Today's Featured Article - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
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