[Horseshowdad]

ok -- here something to check out Razor -- and anyone else -- try to take pin 3 (pin 1 is ground, pin 2 is neutral, pin 8-9 is elevation up & down) out of action -- bend it up and plug in the other 8....see if you get better results. I think I've isolated it down to pin 3 is causing unpredictable results (that's speed down and I'm hypothesizing that there's a short in that circuit). I have very predictable results without that in the mix and all buttons work.

You can also take the entire plug off and just use a jumper wire to actuate each circuit -- touch pin 2 and whatever pin you want for the function -- for example pin 2 and 5 will start the treadmill, 2 and 6 will stop it. pin 2 and 3 is speed up.

At the very least, we might be able to wire a single switch for speed down to bypass that circuit.

I know now that all the parts on this treadmill are good as it all works and is just a shorting problem if anyone is interested in the parts.

hope this helps.....

this looks like it worked -- I put a push button from radioshack on the speed down circuit and took the speed down membrane switch out of the loop....looks good -- further testing tomorrow.