TX Jim the battery A and B wire was what I was telling him to hook together. They go to the circuit breakers under the dash but they power everything on the tractor not just the lights. The power goes to the two power terminals on the key switch.I am not explaining this very well.
As for your other posting you have too modify the wiring harness. There is not a kit I know of to just plug it in and go. There are several serial number breaks on the wiring harnesses on the JD 4020. I think that there are four different diesel harnesses.
It is not hard to change the harness but you need to under stand what you are doing. It is not a job for someone that is not familiar with the how they are wired. The original 24 volt system was kind of an oddity in itself. I never like the way it worked. Everything had to be perfect or the batteries would not stay balanced.
I remember having to wire in a light bulb on the positive ground system when you put a negative grounded radio on the tractor. If you did not the one set of batteries, in a long day, would discharge.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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