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Old 07-13-2015, 09:57 PM   #1
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Ford EBC - trailer disconnect warning

During our last trip my truck started displaying a "TRAILER DISCONNECTED" message. The icon for the trailer in the Ford EBC would blink red. At first nothing seamed wrong, then I got a "TRAILER WIRING FAULT" message and lost trailer brakes. Shutting truck off reset the system, and I went through it again. I have gone through the brake system on the trailer. I show a good ground on ohm meter at all places in the system. The brakes engage and work fine until the message comes up.

If anyone with this system has run down this problem, what did you find?
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Old 07-13-2015, 10:02 PM   #2
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Could it be something as simple as a loose electrical plug??
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Old 07-13-2015, 10:05 PM   #3
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Could it be something as simple as a loose electrical plug??
I should probably point out that I have gone through the simple stuff, like a loose plug. Plug seats nice and tight.

I replaced the crimp on connectors at the axles with soldered joints as well.

What I am really wondering is how many people with the Ford system were able to actually find a problem..vs it being something wrong with the EBC.
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Old 07-13-2015, 10:06 PM   #4
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My truck displayed that message once. Just the trl disconnect message. I just used some contact cleaner on the trl connection and the truck connection. That seemed to do the trick for me, been over a year since I did that.


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Old 07-13-2015, 10:16 PM   #5
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Quote:
Originally Posted by jeeplj8 View Post
I should probably point out that I have gone through the simple stuff, like a loose plug. Plug seats nice and tight.

I replaced the crimp on connectors at the axles with soldered joints as well.

What I am really wondering is how many people with the Ford system were able to actually find a problem..vs it being something wrong with the EBC.
With an intermittent problem as you describe I'd suspect the contacts in the plug. The only EBC's I heard of going bad don't work at all. You could go to the Ford dealer and using there scanner software (IDS/VCM II) they can test the controller in 2 minutes and tell you if the controller is bad or not.
Again, more than likely it's the plugs.
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Old 07-13-2015, 10:19 PM   #6
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Only time I ever saw it on my old f250 was a loose connection.
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Old 07-13-2015, 10:36 PM   #7
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The plug looks fine...but looks are often deceiving. Is their a particular brand of plug that fits the ford best? I figure I will just replace the entire plug pigtail on the trailer side.
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Old 07-13-2015, 11:38 PM   #8
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I got my eyes on this one for the trailer.
http://www.amazon.com/gp/aw/d/B004BE...64J2H6HJHWN404

If you do change the female plug on the truck, remember it's a plug- and-play with the factory Ford harness.
http://www.amazon.com/gp/aw/d/B0002R...7+trailer+plug
Also make sure the plug terminals are clean where it plugs to the chassis harness.
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Old 07-14-2015, 12:44 PM   #9
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I had a similar issue on an old utility trailer and when I went to rewire it for another reason I discovered the ground wasn't sufficient on the trailer.

I haul the 16ft utility or the 37ft LaCrosse with no problems now.
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Old 07-14-2015, 12:48 PM   #10
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Quote:
Originally Posted by 05CrewDually View Post
I got my eyes on this one for the trailer.
http://www.amazon.com/gp/aw/d/B004BE...64J2H6HJHWN404

If you do change the female plug on the truck, remember it's a plug- and-play with the factory Ford harness.
http://www.amazon.com/gp/aw/d/B0002R...7+trailer+plug
Also make sure the plug terminals are clean where it plugs to the chassis harness.
I went ahead and ordered the OEM one (it is made by Pollak) and a zinc end for the trailer wiring. Pretty inexpensive, not to much trouble to change those out.

Thanks for the idea.
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