Posted by Tim Workman on August 26, 2014 at 09:19:29 from (64.72.140.138):
I noticed the other day on my Farmall C that my amp gauge was showing a discharge instead of a charge when selected on the light switch. It"s a 4 position. I replaced the brushes on the inside of the generator thinking that they might be bad considering they are the original parts. No joy when I got it put back together. Took the cover of the Cut-Out Relay off and noticed that one point would disengage and the other would not. All the wiring is correct and hasn"t been switched around.
Should I be in the market for a new Relay or should I be replacing the switch? Any troubleshooting ideas?
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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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