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Old 11-07-2014, 05:53 PM   #1
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2012 Ram 3500 Trailer Brake Problems?

I own a 2012 ram 3500 and haul a 40 foot trailer tri axle with it.. I have been having the issue where my trailer brake controller will flash the SC and on the dash say "check trailer brake wiring" and "trailer brake disconnected" and the worst part about it is everything about it is random.. some days it will work just fine for hours on end and then POOF starts acting up and will either keep acting up or go back to normal.. The symptoms are so random it is hard to pin point the problem.. I have checked and rechecked wiring all over the truck and trailer makeing sure there are no shorts in the system. Brought the truck to a dealer while on the road and they said they are aware of the problem but not hot to solve it. Any advise would be greatly appricated.. thanks
Joe
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Old 11-07-2014, 06:11 PM   #2
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I have a 2012 2500, so I assume the system's similar. I would make sure your plug has a good connection (no slop in the plug) and put some electrical contact grease on the 7 pins.
If that doesn't fix it, inspect all the grounds in the system (truck and trailer) as well as any damage to wires under the trailer from rocks.
My bet is on some corrosion or debris in the trailer plug.

have you tried a different trailer to compare?
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Old 11-07-2014, 06:52 PM   #3
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Yes I tried changing trailers and the problem is still there. I have changed out the cord and the receptacle. If I shut the truck off and restart everything is good for miles. Then it starts acting up. Brought the truck to the dealer and they said it is common.
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Old 11-07-2014, 07:27 PM   #4
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Hmm, that's not much of an answer from them. You'd think if it were so common, someone would have found a culprit.
I think it must be something with the plug in the bumper, but since it's difficult to reproduce, you can spend hours with a muti-meter and get nowhere.
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Old 11-07-2014, 07:31 PM   #5
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I have changed both the bumper plug and bed plug. Still has the same issue. The service manager said he has changed out several ITBM's in 2012's. Replaces them with 2013 models. So I am looking into this.
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Old 11-07-2014, 07:46 PM   #6
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I had that happen once on my 2011 ram 2500 I used to have. After inspection there was a spot on the trailers wire going down frame rails back to the brakes that rubbed the insulation off and shorting out. I fixed the spot and nary another problem. I had a 2012 since then and now my 2014 and haven't had another problem with those either.

I remember a thread a while back about this issue but I think it was the 1500 models that a couple guys had some issues with. But could be similar to your issue. Maybe should check with another dealer. I've been to some dealers that are maybe not the best around compared to some others.

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