Looking at the wiring diagrams for the 1000 series in my 1964 GMC maintenance manual, the ignition coil just has one yellow wire going from the positive side of the coil to the starter/starter solenoid. However, under my hood I have the yellow wire, but also a black wire connected to the positive terminal. I have installed the pertronix ignitor and coil and when measuring as instructed, I measuring 7.5v instead of 12V at the positive terminal of the coil. Supposedly this means I have a ballast resistor somewhere that needs to be removed. However, I cannot find it. I assumed this would be mounted on the firewall in the engine compartment somewhere. However, all I see is the two wires (yellow and black) disappearing into a bundle of wires wrapped in tape. So, first, is my wiring correct for a 1000 series truck since it does not agree with the drawing; and , second, where the heck is this resistor, if there even is one?
