The coil can be tested by putting the + battery to the + terminal & tapping the - terminal to the - battery post. Each tap should produce a spark to jump accross a plug held to ground & attached to the center coil wire terminal. It should be Blue Hot & audiably "Snappy". Use a test light to make sure U are getting power to the coil. It may be on a "Fuse Link" that just looks regular wire until it "Blows Open".   John