Electrical Issue with F350 Diesel

1999 ford f350 diesel. Have burnt up 2 starters and 2 solinoids. Truck tries to start itself if you do not disconnect batteries. The last time it did it it also burnt up window control switch. Keys don't even have to be in it. Any ideas on where to start to find a short??? Or any ideas on what else it could be.

[QUOTE=brokentruck99;7038468]1999 ford f350 diesel. Have burnt up 2 starters and 2 solinoids. Truck tries to start itself if you do not disconnect batteries. The last time it did it it also burnt up window control switch. Keys don't even have to be in it. Any ideas on where to start to find a short??? Or any ideas on what else it could be. Any help you could give would be a wonderful start.