I can't imagine what a second wire would do unless it was a ground strap. Is it possible you are mistaking something else as a wiring post?

The one wire I'd expect should come from the coil and connect to the points. You say its the positive off the coil, that is correct if the truck is still positive ground. If its been converted to negative ground it should be wired negative post connected to the points.


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...