Thank you for your prompt response. The Farmall A is running, again. I cut off the slightly frayed end of the field wire and crimped a new end to it before plugging it back into the regulator. The tractor started like a charm. After I "killed" the engine with the magneto, there's still a slight cloud of smoke at the field wire, but it dissipates immediately. For now, I keep the negative ground disconnected at the battery when tractor not in use. Do you still recommend a 2-terminal NO oil pressure switch to be installed to prevent battery drainage when tractor is not in use? Based on how the tractor is configured, is there potential, parasitic drainage of the battery that I need to prevent? Thanks again for your advice and wiring diagrams.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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