Both are wrong if used on the wrong generator. Because we do not know what you are working on we can't tell you. Ford and several other companies use a generator that is called a B circuit design that supplies battery voltage through the regulator to the field terminal then through the windings to ground. Delco based generators are likely to be A circuit, these have voltage coming from the Arm terminal, or a third brush, going through the field windings then to the F terminal on the regulator to ground. Very different, and doing it wrong can ruin the regulator on either design. What are you working on? Jim
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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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