You must have it wired with 1 wire. If you wire it with 3 wires it will excite from battery power.
Use a short piece of wire and run it from the large battery post on the alternator to the #2 spade plug. This will prevent it from over charging. Now run a wire from the switched side of the key (power only with key on) to the #1 spade post on the alternator. This will excite the alternator with battery power when the key is on. You will have to install a one way diode or a dash warning light in this wire to keep the alternator from back feeding threw this wire.
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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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