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Parts Needed to Install 7-Way and Brake Controller 2004 Dodge Ram 1500  

Published 02/16/2023



Question:

I have a 2004 Dodge Ram 1500 single cab. The build sheet specifies a tow package with a 4 way plug. I want to change over to a 7 way plug to tow a car trailer. There is a blue colored receptacle plug under the left side of dash that is probably for a trailer brake controller. Just behind the exterior cab at the bottom of the truck bed are two plugs that the rear wiring harness plugs into. As I follow the harness to the rear of the truck bed the wiring splits off to the gas’s tank, tail lights, etc. and a 4 way trailer connector. There is no plug at the rear of the wiring harness that this connector plugs into. So I’m probably going to need a 7 way receptacle that this 4 way plug can tie into or plug into plus I’m guessing I’ll need to run two more wires. I’m wondering since I have a trailer brake controller plug under the dash, can I tie the two wires that I have to run into one of the wiring plugs behind the cab. I would like a brake controller that is hidden under the dash with a control knob controlling it mounted in the dash. Any help and recommendations are greatly appreciated.

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Expert Reply:

Sounds like the brake controller wiring you found under the dash of your 2004 Dodge Ram 1500 doesn't run to the rear of the vehicle. I would be shocked if any of the circuits are active though on that connector as everything we know on your vehicle indicates that there's nothing there.

So to convert to a 7-way and install a brake controller you would need the # ETBC7 which comes with everything needed for that. Since you want a knob brake controller the best option is the Redarch Tow Pro Liberty part # RED24FR and # RED69FR. This only puts a knob on your dash like you wanted an uses an inertia sensor to detect how hard you are applying the vehicle brakes to decide how hard to apply trailer brakes.

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Jameson C
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