JD 320 Ignition question

WilliamRis · Jul 21, 2021

Have currently started working on 320 JD hasn't ran for 5 yrs. replacing coil need to know which way coil gets wired seeing as this is a positive ground system?? Any help would be appreciated

Jim.ME · Jul 21, 2021

(quoted from post at 22:16:56 07/21/21) Have currently started working on 320 JD hasn't ran for 5 yrs. replacing coil need to know which way coil gets wired seeing as this is a positive ground system?? Any help would be appreciated

The + terminal of the distributor goes to the points (matching the system ground).

old · Jul 21, 2021

Why are you replacing the coil?? Is it because you have no spark?? If yes then your likely to be wasting your time and $$$. I'd bet you need to clean and or replace the points not the coil

James Howell · Jul 22, 2021

Take a look at the photo below.

Hope this helps.

John T · Jul 22, 2021

I agree with the other fine gents IFFFFFFFF its still the original positive ground ?? - coil terminal receives voltage from the ignition switch being ON while its other + wires to the distributor where it gets its POS ground when the points are closed..

Often a bad coil is one of the last reasons for no spark while burned corroded oxide covered or pitted points are the leading cause. In case you haven't already diagnosed the cause of no spark or checked the points here's a Troubleshooting Procedure

http://www.ytmag.com/cgi-bin/viewit.cgi?bd=farmall&th=5745

John T
Ignition Troubleshooting

JD 320 Ignition question

WilliamRis

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Jim.ME

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old

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James Howell

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John T

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