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Ok, I know the first answer to this is : take it to a junkyard or scrap the metal. But I am determined to make this work regardless if it makes sense or not at this point. Now that that's out of the way...This is an old treadmill from like 1988, and it worked until about 5 seconds before I loaded it up and brought it home. Didn't really see a spark or flash or anything, it just stopped like a normal stop if you pushed the stop button. I picked up a new relay because it was just a few bucks and they had it at my local elect.supply store. I swapped it in with no results. I've checked pretty much every wire and switch that I could with an ohm meter. But I don't understand what the relay does inside or why it's there. Or how the stop button works (whether pushing it is supposed to open or close the switch, but right now the way it is wired it opens the switch when you push it. The master power is closed in the on position and open in the off position. The "start" bump switch is closed when you push it and open when you let go. The "reset" breaker doesn't seem to do anything, but it meters closed and I bypassed it once an tried that with no result. I read on another site to rotate the motor manually and see if it produces voltage, and it does. So I don't know where to start next. Any ideas would be greatly appreciated. Here are some pics and sadly hand drawn wiring detail....I can post the drawings with more detail, but with the 500K limit this is all I can post for now.