Fifth Wheel Brakes Kind of Not Working

So I took it to a truck and trailer shop. There was both a wire that wasn't connected properly and the brakes needed to be replaced which I had them do although the owner actually tried to talk me into doing it myself as they are so easy to replace and was explaining how to do it. The electronic brakes that is. Thanks for the help. Maybe in the future I'll be a little more adventurous but we're running behind schedule. Denali tomorrow!