THe light bulb needed to be connected so that the terminals on the light bulb were not connected to ground. This means that one of the connections goes to the ignition from the on off switch, and the other goes to the #1 terminal. [/quote
That must have been the problem. I had connected the #1 wire from alternator to terminal on light and a short jumper from the same terminal on light to the ignition. I connected the coil wire to the same side of the ignition as the jumper from light. (Duh,
Competing the circuit for the coil) The other side of light was running to negative ground. The other side of ignition was hooked to ammeter.
So the light does not need a ground? #1 in on one side of light, #1 out on other side of light to ignition. Coil wire on same terminal as #1 on ignition and other side of ignition to ammeter.
Question: I am currently only using the "B" wire from alternator and the tractor is running and shutting off as it should. Which is the better setup: one wire or three wires from alternator?
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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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