Where else to look

[Tcarpenter]

2015 lonestar had a shop do king pins while on vacation. Came back truck was dead when they attempted to jump it with a jump box fantasic guy arc it and blew the 200 amp fuse on the battery. This is where my issues start . I have replaced that fuse and I've checked the other 100 amp fuses under the hood and every fuse in the cab I can find. 1. A/c doesn't work at all now. 2. When turning the truck off dash lights flash and the bright lights will flash. 3. When applying the brakes the damn abs light on trailer flashes. I'm more than positive this is all tied together. Just needing some other ideas on where to look. It was suggested to me to have the bcm reprogrammed so I took it out and had the dealer bench program it.