To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Most brake controllers stick out and take up knee space, but this one hides the main unit behind the dash. All you see is a small knob on the console—just 1-7/8" long (including knob), 9/16" wide, and 3/4" tall. It gives your interior a clean, factory look while keeping full access to controls. That single knob handles everything: adjusting brake power, triggering manual override, and showing color-coded alerts.
Rutted trails and steep descents can make towing unpredictable. Off-road mode gives you direct control of the trailer brakes with a preset power level, independent of your vehicle’s braking. Keep power low for sand or mud so the trailer doesn’t dig in, or raise it on downhill grades so it doesn’t push you forward. To activate it, turn the knob to zero, brake once, tap twice to confirm, and watch the LED glow green when engaged.
The Tow-Pro Trail senses how hard you’re braking and matches your trailer’s brakes accordingly. Its internal 3-axis accelerometer measures inertia to apply just the right braking force—hard stops when you need them and gentle deceleration in traffic. The result is even braking across your setup with no jerk or push-pull effect. It works with electric and electric-over-hydraulic brakes on trailers with up to 3 axles (6 brake assemblies).
The controller installs in two parts—a small main unit and the dash knob. With almost no mounting restrictions, you can secure the main module behind trim using screws, tape, or zip ties within the 3' cable reach to the knob. The included custom harness plugs directly into your vehicle wiring—no splicing required. Once mounted, calibration happens automatically as you drive.
This controller is tested to meet or exceed UNECE R21 and FMVSS 201 safety standards for durability and occupant protection. It runs on 12-volt and 24-volt systems, outputs 9V–32V at up to 25 amps continuous, and carries a 2-year warranty—ready for heavy use on and off the road.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi everybody, Andy here with etrailer.com. Let's take a brief look at this REDARC Tow-Pro Trail proportional brake controller with custom wiring harness. Now this brake controller wiring harness has been designed to fit your 2015 and newer Ram 1500, 2500, and 3500, then your 2019 and newer Ram 1500 Classic, then your 2016 to 2019 Ram 4500 and 5500. On custom fit parts such as this brake harness, I do recommend taking advantage of our vehicle fit guide here at etrailer.com. Simply input the year, make, and model of your vehicle and our fit guide will confirm if this brake controller will work for you or if we have something comparable that will work for you. Now this brake controller is going to require minimal dash space in your vehicle and it's gonna be very simple to install and operate.
It has a factory look and feel, looking like it's always belonged in the dash or console of your truck. This brake controller activates your trailer brakes in proportion to your truck's braking action. It will automatically adjust the trailer's braking based on the deceleration of your tow vehicle. Now this brake controller comes with a unique feature that's going to let you respond to any terrain or weather that you meet while on the road. The User-Controlled Mode is going to give you direct control over your trailer's braking so you can have exactly the level of power output you need for any situation.
So this brake controller will be perfect for off-roading or adverse weather conditions. In this User-Controlled Mode, this Tow-Pro Trail will apply your trailer's brakes with the same preset amount of power each time you activate the brakes in your vehicle. You're just gonna set the power low if you're towing through sand or mud so that the trailer doesn't stop with too much force and act as an anchor. Or when you're on a steep descent, you can set the power to a higher level to ensure that the trailer's momentum doesn't cause it to push against your tow vehicle. Now this control knob will mount in your dash or your console any really easily accessible area, and it's going to allow for a quick and easy adjustment of the braking power with just the turn of the dial here.
This is also going to provide manual override by just pressing the knob, and then that's going to activate the brakes. And then it's going to offer you simple diagnostics with a bright colored LED in the dial. Now this main unit here, this is going to install out of sight. So what's nice about this setup is there's not gonna be any more banging of your knee on a bulky controller underneath your steering wheel when you're getting into your truck. There's not gonna be any interference with airbags or any other accessories in your vehicle.
And of course, there's no hard-to-reach override lever or impossible-to-read screen. This can be mounted in any position, any direction and angle with the included mounting kit that you see here on my table. There's no complicated wiring because of the custom fit harness that includes for your Ram. You just plug it in and you're on your way. Now if you do not already have a 7-way plug at the back of your truck, take a look at our exclusive 7 and 4-way brake controller installation kit that you see there on your screen, and you can get to that kit by punching in that code there, the item number that you see there on your screen, the ETBC7. Pop that into the search field of our website. That will take you to that kit if you are in need of a 7-way at the back of your truck. Now this kit, this brake controller kit, is going to meet or exceed both the UNECE R21 and the Federal Motor Vehicle Safety Standard 201 regulations for sustainability and safety. This brake controller is for trailers with up to 3 axles, 6 brake assemblies. It's designed for use with electric or electric over hydraulic trailer brakes, and it's gonna work with 12 volt and 24 volt electrical systems. Let me give you some real quick measurements of this brake controller itself. So looking at the overall length, 4 inches. The overall width, about 3-3/8 inches. The overall height, about 1-1/8 inches. Instructions are also included to guide you through the installation and operation. And I think that's gonna wrap up our real quick look today. I do hope that our time together was helpful for you. Again, my name is Andy. Thank you for joining me.
Customer Satisfaction Score:
86% were satisfied with this product
14% of customers were not satisfied
Ratings & Reviews
super easy, works great
Components specific to my vehicle made for easy installation. Mice system!
Easy to install and works perfectly on 2023 Ford Bronco Outer Banks.
Needed the product next day. Hassle fee transaction. Total awesome experience. Tracked the sales process right to my door. Thank you Etrailer!
It worked great - thank you!
Great product with easy install. It works perfectly. Thanks for the recommendation etrailer!
I called for further information on another Redarc Controller. Will was very polite and helpful, clarifying the finer details and fielding my questions prior to purchase. Excellent products and customer service from etrailer. Many thanks.
Just like OEM at a cheaper price and not on back order for three months like Mopar.
Very easy to install and works great
They always have what I need, makes things simple and easy.
Super product! Easy to install and setu p.
I wasn’t sure spending the extra money on this was necessary cause I had always been using the other style controls for ever and they worked fine. I bought this because of the limited leg room under my dash on my new rig. After installing this, not only did I have more refined braking control, I mounted the control knob where I didn’t have to hunch over to reach for adjustment or manual braking. And now the reason for buying it was just an added bonus.
The Redarc controller that I ordered to install in my Lexus GX460 was perfect! I ordered the Tow Pro Trail version. The harness to connect the factory trailer harness under the dash was the correct one for my Lexus. lling the controller that se are a little more work than installing the ones that hang under the dash, but well worth it!
Just works very well.
Excellent product. Updated from a Curt wireless Bluetooth controller. The installation of the Redarc is plug and play. No modifications of any kind required. Being able to manually set brake force and to operate the trailer brakes independently is just great. Highly recommend.
Awesomeness... Thank you.. HELL YEH... Merry Christmas to All at etrailer
Great workmanship and easy to install. I installed the main unit right below the steering wheel behind the panel per the video by redarc. If you install the dial where the 12v outlet plug is currently located, you can find another place to put your 12v port like i did. It was simple to adjust to my tandem axle trailer. Glad I purchased this instead of the more expensive factory controller.
Easy to install. And, with plug n play for the Bronco, once the trailer was hooked up it was ready for use.
Its great. Works just as advertised. The only gripe is that the provided switch slot is not the factory one for the frontier and it moves around. I ended up modifying the blank switch cover and using that instead, but overall a great kit. Wiring was easy with the provide harness for the frontier.
I always deal with etrailer , best prices , quality items , great fast shipping
Parts are perfect for my vehicle. Etrailer makes it too easy. Great comunication also.Plug and play just like advertised.
Installation was a breeze with the custom harness. Plug and play with all the electrical components. I adapted a marine surface mount 12 volt plug housing as a mounting solution for the control knob, eliminating the need for any drilling.
For my 2021 Gladiator with factory tow. Everything including specific harness and little round mount for the control knob to replace the 12v outlet was in the kit. Hardest part of install was learning how to open the dash panel. The controllor powered up and is working as expected on normal road driving. Very straight forward and no struggles.
Highly recommend!!
Installed in a modified Tacoma, with a serious off-road trailer. I use this system camping / off-road 40+ nights per year, mostly in the Sierra Mts. I have blown 2 other brake systems which caused unsafe conditions. I had just a few hours to install the RedArc system before leaving on a trip. The truck specific plug and play setup was quick and easy with a very clean simple dash button. It has been dependable over the year.
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