[74gto]

I have the original Pertronix I put in back in 2000. Mine has 12v running to the coil. I used a Super coil, so the instructions said I needed to add a one ohm resistor to the circuit. I used a Chrysler ballast resistor. IIRC, the instructions said if you're using the Pertronix coil, you could wire it direct, but need a 12v key switched source. The yellow/black wire has a resistor built in so it does'nt fry the points.That's why you don't have a constant 12v with the car running. I ran my wire right off the fuse box, where there was an open 12v ignition on terminal. My pertronix also needs to be energized for at least 5 seconds before you can crank on it and have spark.