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John Deere Tractors Discussion Forum
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Re: How to tell polarity?

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John T

01-22-2013 14:52:02

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Allllllllll two cylinder Deeres were originally Positive ground. Of course, you can change it to Neg now if you wish JUST BE SURE TO POLARIZE THE GENNY BEFORE START UP. If you change to Neg ground the coils + gets ign switched voltage while its - wires to the distributor (opposite as original) Also the ammeter leads need swapped or it would read bass ackwards.

John T

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01-23-2013 08:19:35

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 Re: How to tell polarity? in reply to John T, 01-22-2013 14:52:02  
Hey John T! How ya doing? Let me see if I understand what you are saying about the coil. I"ve just bought a JD G that the previous owner added an alternator and switched to a negative ground. So he must have or should have switched the coil wires too? So when I put a generator on it, I should expect to switch the wire from the coil to the distributor.


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John 37A

01-22-2013 16:39:32

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 Re: How to tell polarity? in reply to John T, 01-22-2013 14:52:02  
Thanks, John. That's exactly what I was looking for. My tractor has been switched to negative ground already then.

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