Has anyone else had a problem with the factory trailer brake in their Dodge Ram 3500? Mine is a 2015 Longhorn with 23K miles on it. It has performed flawlessly, until it didn't. It says that TRAILER NOT CONNECTED, when the trailer is. It says it when connected to any of my 3 trailers. Our farm mechanic connected his 2015 Dodge with the ITBM in it, and his truck reads my trailers. The local dealership replaced the ITBM yesterday under warranty.. Even if the replacement works, I'm now gun shy! My question is - Does anyone know how to bypass the ITBM (Hopefully without voiding the truck warranty), so that I can have a P3 put in? I've been told that you can't. I even went to a top truck accessories place that said the same thing. I can't believe, that! I pull a 2017 3H 17' LQ, a 2013 Montana 39' 5th wheel, and a 2000 4 Star 3H MT. I can not be going down the road worrying if my trailer brake will fail again!
Posted 2017-06-16 6:43 AM (#170070 - in reply to #170068) Subject: RE: Factory Intergrated Trailer Brake Failure
Location: North Carolina
Brushy ... Stuff happens.. I'm sure if the tech has done the proper job, you're okay. The factory controller functions better than a P3 since it knows everything the truck is doing. But if you really want a belt and suspenders, you could have a P3 installed parallel to the factory system. It will take separate wires and connections. Including a second trailer connection in the back of the truck. If your factory system failed, merely move the trailer plug to the P3 connector.
Posted 2017-06-19 3:05 PM (#170101 - in reply to #170068) Subject: RE: Factory Intergrated Trailer Brake Failure
Location: riverside ca
it is totally possible to do, all the brake controller does is check if you are a stepping on the brake(it uses a switch on the pedal) then magic happnes in the box and voltage is sent down a wire to your trailer in a way that the controller thinks is appropraite. they are very basic devices that hook up with just 4 wires. The built in one in you truck is smarter in that it monitors how hard you are pressing the brakes using the abs computer. The p3 is a good brake controller for a stand alone, and can for sure be installed in place of your factory brake contoller. But IMHO it is not as good as the specifially engineered for you truck system the manufacturer installed. Guess what the P3 can go bad too, so i would stay with the intergrated system.
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