Before I posted this, I looked on old threads for the answer. They didnt help ! from what I have read you need a multimeter, which I have. There are primary and secondary post that sholud be tested for resistance. On my coil which is from a 2004 electra glide ther are only two post which are for the wires that go to my spark plugs. How do I determine which are primary and secondary? and where are the second set of post ? thanks for your feed back !