Well, I haven't had time to really look at it since the wife has it most of the time, but I sat in it just and and did a test. I started off with the wheels straight and cranked it to the right as fast as I could, twice. No stalling.

Then, I did the same thing, only to the left, and it stall both times, in almost the same spot, like clockwork. So it has to be a switch or a wire.....