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Farmall Bob
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Joined: 05 Mar 2009
Posts: 343


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PostPosted: Mon Nov 23, 2020 8:27 am    Post subject: alternator Reply to specific post Reply with quote

Had Farmall C tractor painted years ago and the painter took and left the wire of my two wire alternator. Purchased a plug, red wire goes to battery connector. White wire goes? and does it need a diode attached? Comments appreciated. Thank you.
Bob
 
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Janicholson
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Joined: 30 Jan 2004
Posts: 35381
Location: St. Cloud, MN

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PostPosted: Mon Nov 23, 2020 10:23 am    Post subject: Re: alternator Reply to specific post Reply with quote

The #1 terminal is attached to ignition. If it has a resistor, it attaches before the resistor, on the ign. switch side. It definately needs a diode with the band side facing the alt. of a light bulb from a marker light, not a LED. Or a 10 ohm 10 watt resistor in series with that wire. Jim
 
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used red MN
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Joined: 24 Aug 2013
Posts: 2089
Location: Coon Rapids, MN

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PostPosted: Mon Nov 23, 2020 10:46 am    Post subject: Re: alternator Reply to specific post Reply with quote

When Jim says ignition he means the 12volt feed to the ignition coil. Meaning it has 12 volts when the ignition is turned on. Is this a Delco 10si alternator? If so it should be a three wire. Should have a 10 gauge or heavier feed wire to charge the battery off the terminal with an insulated stud and nut on the back.
 
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