Set the ohm meter on the lowest range, probably about 200.
Check across the primary terminals with the coil out of circuit. A 12v coil should have about 3 ohms resistance. If it's lower, down around 1 to 1.5 it's a 6v coil or it's internally shorted.
You if your meter has an amp setting that is in range, connect it in series to the switch side of the coil and ground the points side. It should have about 3 to 4 amps draw. Work quickly, the coil will overheat if left connected for more than a few seconds!
If the amp draw is high, the coil is shorted or the wrong coil, either will cause the coil to overheat and can take out the Pertronix unit.
I have heard that solid wire wires are hard on a Pertronix unit, but I've also heard that only applies to use with a high output coil, which you don't have or need. I would not be concerned or blame the wires unless Pertronix says to change them for warranty purposes. Then I would go with spiral core wires, not carbon.
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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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