I'd wager you have a Delco 10SI "3 wire" alternator and that the wire from the door bell button goes to the #1 pin on the edge of the alternator. The alternator requires a momentary voltage "kick" to start it charging. There are several ways to accomplish this. On yours you start the engine then press the door bell button to start the alternator charging.
This same function is usually accomplished by a diode or "idiot light" that is automatic.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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