Put your test light on your coil "+" terminal with ignition on and if it lights up the points are open, when the points close the light should go off. This test can be done while cranking the engine over or turning it by hand a few revolutions. If your test light stays on that means the points are not making contact (closing) with each other. If the light stays off that means they are not opening.
When the points are closed it creates a ground and allows current to flow thru the points to the ground without any resistance so it's easier for the current to travel thru the points than it is to travel thru the test light which has resistance and that is why the light goes out when the points are closed. When the points open the current travels thru the only circuit which is the test light and it lights up.
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Today's Featured Article - Gettin My Old Tractor Home - by Clayton Sweeney. My name is Clayton Sweeney. I am from Southern Maryland in a small town called Lothian. I am 20 and my father and I are the proud owner of a 1954 Allis Chalmers WD-45. When I was 18, I dated a girl in the next county over. Her family are tobacco farmers. It was a cold Thanksgiving evening, and we were going up to her Grandparents house. As we passed one of their barns, I noticed something orange in the corner of my eye in this old shed. It was pretty dark and I asked what it was
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