Would really help to know the make and model of the tractor. I see two possible ways, one being that the tractor is new enough to have a low voltage light (like my 85 model Steiger) and the one wire alternator was not able to handle the electrical load which allowed the battery to get low enough to light the low voltage light. Thgat would not explain the headlights going out though ?
The explanation of an idiot light fed from the lighting circuit downstream of the breaker would explain the lights going out and the idiot light going on.
The outfit where I buy my "1 wire" Delco SI series regulators includes instructions saying that if the user wants a working idiot light or wants lower excite speed, that you only need to wire the #1 regulator terminal to the idiot light. This converts it to a "2 wire" alternator. These regulators do not need the sense wire, but you might as well also install the #2 sense wire, Then the wiring is in place for the time when the alternator or regulator is replaced with a stock "3 wire" unit.
That may be the situation in this application, where the "1 wire" alternator is actually wired as a"2 wire" unit.
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Today's Featured Article - Show Coverage: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
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