12 Volt Coil

John C G · Jul 30, 2015

I am sure this topic has been beat to death... but i have a Farmall 400 with the original 12V generator Positive Ground. In regard to replacing the coil, does the positive side go to the distributor or the negative side? As well i have a 1976 Cub with original 12V Alt. what side of the coil goes to the distributor?
Thanks for all the help
JCG

Anonymous-0 · Jul 30, 2015

just match up + to + and - to -. Simple as that, plus if you get it backwards you nor the engine will ever know.

Mark-Ia · Jul 30, 2015

If your tractor is + ground, wire from the distributer goes to + on the coil. If - ground, wire from distributor goes to - side of the coil..

old popper · Jul 30, 2015

If you get it backward, you will have a tendency to foul plugs, and will have a hard starting tractor.
Don't ask how I know............................

TractormanNC · Jul 30, 2015

Unless your 400 was diesel or LP, the original electrical system was 6 volt positive ground

John T · Jul 31, 2015

I saw someone post on here something like "it made no difference", WELL THEY ARE WRONG. There's a reason the coil design engineers and manufacturers bother to design for and label those + and - terminals. If it made no difference they probably wouldn't bother with those labels. Sure, you still get a spark (even if less efficient) regardless, but I strongly advise you to wire it as suggested below. Still its a persons own tractor and their choice to wire it right or wrong as they choose.

John T

John C G · Jul 31, 2015

It is a factory LP 12 volt system
jCG

12 Volt Coil

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