I am working on my grandpa's 1952 8N that has the 6 volt positive ground system with a side mount distributor. It is not getting any spark at all. I have checked voltages and I am getting a little more than 6 volts on both the positive and negative terminals of the coil with the ignition turned on. I am trying to figure out if I need to have a ballast resistor between the ignition switch and the coil, right now the wire runs directly from the ignition switch to the positive + terminal on the coil. I tried reversing the coil and connecting that wire to the negative terminal instead, but still no spark.