You didn't give us much information so we have to make some assumptions. Does it have the original generator and cutout relay? The original system used a third brush generator. The field coil circuit went to ground through the light switch. With the light switch pushed "in" (low charge) it produced 4 amps (field circuit through the resistor on the switch to ground). Pull the switch to the first stop and output incresed to 10 amps (field circuit now bypasses the resistor and goes directly to ground). upon startup as the generator begans to produce voltage the coil in the cutout gained an electromagnetic field that closes the points completeing the circuit to the ammeter then to the battery.
You manually close the points in the cutout without the engine running and it completes the circuit to the battery and you will have high amperage flow through the wires to the generator armature and field circuit (ammeter will show max. discharge). I told my students that all electrical components are built with smoke in them. Hold the points closed for very long and the smoke will start to come out!
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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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