Ct332 shutting down

I have a jd ct332 with 3500 hours on it. Just recently the engine shuts down when unhooking the seat belt. I has never done this before. I have the aux hyd locked so they are not running. And in the past 50 hrs I replaced the seatbelt switch.



My local dealers are of no help. So any help would be great.



Thanks

Ct332 shutting down