Problems with radio on 2019 Tacoma

Replaced original radio with a pioneer that at first would freeze up or stop working and then would work good for a day or two, now will not work at all. Have had it looked at by three different radio techs that can not find anything wrong with radio or connections. The most recent tech suggested it might be a ground that came loose somewhere on the truck itself and someone knowing the routing of the wireing could figure it out? Any suggestions