Heck, tough to say, but sounds like some flavor of People.
I honestly haven't had to go over the wiring much on mine, but the obvious candidates would be the power switch, & the brake handle sensors.
Those are not impossible to bypass, or test, but that's where something a bit more model specific might be useful to know. I've seen some general How To's on these in a few forums, but haven't had the issue myself thankfully.