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Harry Ferguson Tractors Discussion Forum
Show Parts for Model:

Re: bad 12 volt conversion

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Jec

05-10-2013 06:12:28
147.97.17.165



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It has an amp guage on it that does not work. The wiring is pretty simple and not to hard to explain.
The 1 wire on the alternator is connected to the amp guage. Other side of amp guage is run to solenoid.
Both sides of start button go to the solenoid.
One side of kill switch to same side of solenoid.
Pos. battery cable from same side of solenoid to battery.
The peice that I now know is ballast resistor has green wire to ignition coil. Then a red wire that splices to kill switch and the other part goes toward alternator and is disconnected? Where should that go.
That is all there is to the wiring.

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IrvIa

05-10-2013 20:28:25
207.199.229.145



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 Re: bad 12 volt conversion in reply to Jec, 05-10-2013 06:12:28  
The charge wire from the alternator can't go to the amp gauge. It has to go the the kill side of the switch. I found the best place to attach that wire is to the positive side of the coil with the ignition "on" wire from the switch. The charge wire also needs a diode in it to stop the current back to the alternator with everything off and running the battery down when stopped. My auto parts house has a plug in for the alternator with the diode already wired in it and a inline terminal on it. About $7.00 and a clean installation.
Like others have said, get rid of the starter solenoid...they made a good system more expensive and not at all safe. Irv

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Jason S.

05-10-2013 18:13:35
174.237.7.176



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 Re: bad 12 volt conversion in reply to Jec, 05-10-2013 06:12:28  
A TO30 with a starter button and a solenoid? Hmm...somebody has added some not needed stuff to it and made it more complicated than what it is. Do you have a test light. If you have a test light take the negative cable off the battery. Hook the alligator clip on the lead of the test light to the battery cable. Then touch the test light to the negative post on the battery. If there is a draw on the battery the test light will light up. Start unhooking wires one at a time until the light goes out. When it goes out, whatever wire is unhooked then you know it is in that circuit.

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