I've never seen this problem but I've heard about the rear windshield wiper motor shutting down the truck. I imagine it could also be the front wiper motor. I know it sounds crazy, shutting down a truck because the windshield wiper doesn't work but that's what Yale decided was best.

I don't know if you could maybe change the software to eliminate this problem. Seems like you could use the software from the same forklift without the cab if Yale offers this model without the cab.