Prostar Problems

[Obelix]

Well where to start, a few weeks ago my 2010 Prostar was hooked up to a trailer about to head down to Florida when all the sudden the breaks locked up. Couldn't move forward or backwards. Thinking it was a break valve gone bad, replaced it and nothing. Breaks still were locked. Had road side service come out and they found oil in the air lines. So had it towed back to the shop here in KY and they replaced the compressor and air dryer. They also noticed the power steering line was dry rotted and slack adjuster at the front right steer was in pieces, so they replaced those as well. After a week of getting this replaced, got word that the truck was ready to go. Picked it up and hooked up to another trailer, then the christmas tree lights came on. ABS, TC, Check engine and all those beautiful lights everyone likes to see just came out of nowhere. Trailer brakes locked up and almost caught on fire. Truck also lost some coolant but that's the first time I had that issue. Needless to say, truck is back at the shop and mechanic is saying he traced all the lines and thought maybe it has something to do with the body control module. Well that was replaced last Saturday and still acting up. Any help would be greatly appreciated.

Fault descriptions on what was showing before the body control module was replaced is in the attachment.