The in-harness resistance wire ain't your problem, since you state you have voltage to the coil.
The wire either works or is broken, and with voltage to the coil it ain't broken .
Below is a link to a John Deere "Fundamentals of Service" manual on the workings of Kettering ignition systems. It should help you figure out what's REALLY going on.
(It's a JD manual avauilable on an IH Cub collector's site.)