Posted by roger1940 on February 08, 2009 at 15:45:05 from (207.118.152.192):
Please can anyone help. I have a John Deere 730D-ES. I have an electrical problem I can’t solve. Brand new wiring harness, complete new switch, new starter button, new rebuilt 24 volt generator. After installing harness and all new components, I have the wire from switch to fuel gauge is 12 volts negative. Everyone I’ve talked to and everything I’ve read tells me it should be 12 volt positive. I can’t get fuel gauge to work with the negative 12 volt. What have I done wrong? All connections have been checked and rechecked and all seem to be right. Please can anyone help me.
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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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