Posted by Bret4207 on October 24, 2017 at 05:15:41 from (64.19.90.196):
In Reply to: 12 volt posted by newhaven on October 23, 2017 at 11:45:13:
I have been told a 1 wire alternator, or a 3 wire for that matter, can't possibly drain a battery with the ignition off if it's correctly wired as detailed above. Yet, I have had 2 tractors that did just that. There is a diode made to fit in the alt wire that limits back drain from the alt. I've been told this is totally unneeded, yet it's recommended by alt shops I've dealt with. I'm not going to pretend to know the correct answer, I just know using that diode stopped my drain.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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