[igotjam]

Problem concerns dropped signals or inability of systems to communicate properly with each other. (that's just a guess) What happens is that after hook up it works perfectly, but as you drive along the alarm goes (on the Ford controller) and the error message says no connection. Sometimes it comes back for a while and then alarms again.
Have had the trailer in and been told everything is OK. Same with the truck. Replaced the plug ins twice and nothing changes. My next step is to get the dealer to take both the truck and trailer together but unfortunately the soonest they can look at it is over a month from now. (no other dealers want to look at it as apparently its a wierd system they don't want to deal with)
What I might do is just take the truck to a trailer place and have a aftermarket controller put in instead of the Ford one. I'm told that will fix the problem.