F250 Trailer Disconnected Message
We were 25 miles away from our second campground on a 3 day 1000 mile trip when the message center on my 09 F250 indicated "Trailer Disconnected". The trailer running lights were still on and braking ...
Forum Discussion
dclark1946 wrote:Lynnmor wrote:
Your truck is seeing an intermittent connection of the trailer brakes. You need to inspect the trailer plug and brake wiring all the way to the magnets. That includes any wires inside the axles.
So you are saying the Ford trailer system is monitoring the brake circuit only to determine connectivity? Is that continuous or only when brakes are applied and the system monitors current draw?
When there is continuity, (wiring is connected to ground) thru the brake magnets, the truck determines there is a trailer connected and will give the trailer connected notice. When that continuity is broken with the engine on, by a bad connection or other wiring fault, you will get the disconnected notice. This repeats each time the engine is restarted. Of course if the trailer disconnects either by operator or fault, the truck will not give any notices when restarted.
