I was lucky. It was the first thing I checked.The first thing I did was disconnect the relay (easy, since the connector was exposed behind the seat). That disabled the controls (as it should). Then took the relay off and checked for continuity. It was pretty obvious that it was stuck in the closed position (it's a normally open relay which closes when a little tab on the safety arm is positioned next to it). I tapped on it and passed metal next to it and it wouldn't open up. Due to the importance of its operation, I wouldn't have re-used it even it I could have gotten it to working.