Hello, I have 1972 Panther 440 with no spark. I changed the internal ignition coil and not both condensers. I tested the red and white wires that come from the condensers to the each external coil with a test light. The red wire which goes to the right external coil has power. The white wire which goes to the left external coil does not have a power. I have looked all up and down the white wire for spots that are exposed and fixed anything that was questionable. Also have cleaned the points several times. I don't know what's wrong and need help.