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Old 06-26-2015, 01:31 PM   #1
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Trailer Disconnect with 2015 Ford F150

I keeping getting a "Trailer Disconnect" message on the driver information display. The Ford dealer replaced the brake controller but I keep getting the same message. The connector cable on my 2013 20 ft. Airstream seems to be in excellent shape. I have cleaned the the connectors on both the truck and trailer with an electric spray cleaner. I don't see any bare wire going into the trailer brakes which could cause a possible short.

Thanks in advance for anyone that has an idea on how to solve the problems.

Bill Dunlap
Bishop, CA
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Old 06-26-2015, 02:22 PM   #2
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If this condition can be seen while parked, and not having driven at all, I would try hooking up to another trailer. If that trailer also shows a "Disconnect Condition" the problem is in the Ford. The likely hood that you could find 2 bad trailers is unlikely.

The next thing I would check is to open up the connector on the Ford rear and look for a loose wire. Then the trailer connector. If you are not comfortable working with this type of equipment have it done. The wires are very close theatergoer on the terminals in the connectors and you don't want to cause more problems than you already have. If someone opens those connectors I would have then soldier every connection to prevent future problems.
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Old 06-26-2015, 02:58 PM   #3
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Howie,

Thanks for the info. The problems only shows when driving - it occurs about every 1-3 minutes with the "Trailer Disconnect" coming up on the driver info screen. If I push the "ok" button, it will disappear and then comes back. A Ford mechanic in Reno, hooked up my trailer to his 2014 Ford F150 with the same driver info screen and drove the trailer around without having the message appear on his screen. This makes me believe the problem is in the truck, not the trailer. The mechanic also took the connector out of the back bumper on the Ford and inspected it and then checked it with a multimeter - he found no problems. You are right about the wires being very close. It seems unlikely that the plug would be bad but it did occur the very first time I hooked up the trailer. I am still not ruling out a bad ground on the brake magnets but I think it may be one of the modules that sends info to the driver display screen in the truck.

I would great appreciate any other input. Thanks

Bill Dunlap
Bishop, CA
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Old 06-26-2015, 03:17 PM   #4
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We experienced the same message with our 2011 F150 and 2014 Airstream last year. It was about 1000 miles into our first trip when we first saw the trailer disconnected message. Over the next 1000 miles the notice became increasingly frequent.

Our issue was related to a brake line that was pinched on the trailer. The assumption was when the trailer was built the line was not clear and one bump or another was enough to pinch the line.

Tom
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Old 06-26-2015, 03:42 PM   #5
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The mechanics test leads to the truck.

You can connect a brake magnet from the red wire to ground right behind the brake controller. Test with a meter to ground that the red wire is in fact the brake applied wire. Use the manual switch to test.

While the brake magnet is hooded up go for a drive, no trailer. If the Disconnect message comes on I think it is the sensing circuit in the controller.
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Old 06-26-2015, 05:36 PM   #6
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I too have had this happen on my 2015 as well as another Airstream owner I know with a 2015. He has taken his into Ford to look at and I am not sure if they found anything or not. I have pulled both my 25FC and my 28FC and received the message on both so I tend to think it is in the Ford coupler. I did just return from a 2 week trip and made very certain I plugged the Airstream cord in fully, wiggling it while pressing in to ensure a good connection. Had no message on that trip. Good luck. I just pulled a Polaris trailer for about 600 miles the last two days and had no message on the 4 pin connector, so definitely something with the 7 pin.
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Old 06-26-2015, 05:36 PM   #7
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Howie,

"Trailer Disconnect" message on Ford F150

Thanks for the advice. The truck is at the Ford dealership now. The wires from the brake controller in the 2015 Ford F150 truck are hard to access since the controller is built into the dashboard. If they are not able to repair it, I was thinking of pulling the wheels off the Airstream and checking to see if the ground wires from the brake magnets have a good contact point. I am not sure how or where Airstream (Dexter) ground the magnets.

I really appreciate yours and others who have made suggestions.

Bill Dunlap
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Old 06-26-2015, 11:13 PM   #8
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Trailer Disconnect with 2015 Ford F150

The cover for the receptacle is spring loaded an designed to hold the plug in place.I have had instances when the plug was not completely in and not locked in place with the door.Then I would get the disconnected warning.


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Old 06-27-2015, 01:22 AM   #9
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I had an intermittent problem with a "disconnected"message, or something like that (it's been a few years) appearing on my controller that drove me crazy. I rewired, replaced, and reinstalled everything over a couple of years. When I pulled the brakes to repack bearings, I found one of the wires to the magnets had rubbed through the insulation on the drum. It would short periodically. Fixing that resolved my problem.
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Old 06-27-2015, 04:11 AM   #10
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Get a trailer emulator from Amazon $20. Stick it in and drive around. If it still happens you know it's the truck!
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Old 06-27-2015, 04:12 AM   #11
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Amazon.com: Tekonsha 6562 7-Way Blade Tester and Trailer Emulator with LED Display: Automotive
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Old 06-27-2015, 12:02 PM   #12
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Sounds common. For me, it was the connection to the trailer. I took some sandpaper and cleaned the female connectors. The problem went away. The fact that it's intermittent says to me that the connection is either loose, or dirty.
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Old 06-27-2015, 12:18 PM   #13
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Bill, I had that on my 2014 F350. I plugged/unplugged the trailer harness in The truck a couple of times, and I've not had it since. I also had both curbside magnets breakaway from the backing plate, one of which was at the time of the error message, so it could have been either a combination, or a just one of the conditions.

Steve

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Originally Posted by billdunlap View Post
Howie,

"Trailer Disconnect" message on Ford F150

Thanks for the advice. The truck is at the Ford dealership now. The wires from the brake controller in the 2015 Ford F150 truck are hard to access since the controller is built into the dashboard. If they are not able to repair it, I was thinking of pulling the wheels off the Airstream and checking to see if the ground wires from the brake magnets have a good contact point. I am not sure how or where Airstream (Dexter) ground the magnets.

I really appreciate yours and others who have made suggestions.

Bill Dunlap
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Old 06-27-2015, 12:24 PM   #14
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Not to step on any of the great comments and suggestions made so far, I really do think this is something on the 2015 F150 specifically in this case, which is what was asked about initially. Since I have experienced this with mine, and I know others as well that have plus now Bill who originally posted this, it does seem that it is the truck. As mentioned in my prior post, I have pulled two Airstreams with my 2011 F150 and both with my 2015 F150 and just got the message with the 2015. For those which do not know, it has a pretty thorough trailer information screen and I am not sure if it has something to do with it or not.

Someone posted to make sure the cover was snapped to make sure the connector stayed in and in all of my cases it was still snapped in when I stopped and checked the connection after getting message. I will take it to dealer and see if I can convince them to change the connector. By now Ford may have issued a tech bulletin. I'll run some searches on F150 forum and see if others are experiencing.
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