I'm sorry, I'm not sure where I got three. You are correct there are only two wires. The switch is very simple in that there is a metal piece that slids down and completes the circuit. Essentially you should be able tape the button down. Possibly the tape is stretching and allowing the botton to raise back up. I have seen where people have placed a small piece of cardboard over the button and then tightly taped that down. If the tape isn't stretching it's possible that with wear there is now a specific spot that makes the best connection. If at all possible see how far down the button is depressed when you are sitting in the seat and tape it accordingly. I would think easier than trying to look under yourself while sitting would be to find or cut a small piece of metal the width of the connectors on the seat switch and long enough to connect both wires together. I hope one of these works for you, keep me posted.