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Most brake controllers clutter up the cab, but this one hides the main unit out of sight behind the dash. All you see is a small knob that measures just 1-7/8" long and 9/16" wide. It blends right into your dash like it came from the factory. That single knob does everything—adjusts braking power, activates manual override, and shows color alerts while towing. You get a clean factory look and no bulky box under your knees.
Instead of that jerky push and pull when slowing down, this proportional controller applies your trailer brakes with the same intensity as your tow vehicle. A built-in 3-axis accelerometer senses deceleration and sends matching power to the trailer for balanced, even braking every time. It’s rated for trailers with up to 2 axles (4 brake assemblies) and works with both electric and electric-over-hydraulic brakes. Output ranges from 9V–16V with an 18-amp continuous current rating for steady performance mile after mile.
Wiring doesn’t have to be a chore. The included custom harness plugs right in—no splicing required. The main box can mount in nearly any orientation behind trim or under panels using screws, tape, or zip ties. A 3-foot cable connects the module to the knob, giving you plenty of flexibility to place controls where they’re easy to reach. Once wired up, calibration happens automatically as you drive.
When sway starts or you need extra braking power in a pinch, just press the control knob to activate the trailer brakes on their own. It also triggers the trailer brake lights so drivers behind you know you’re slowing down. The LED changes from blue to red as braking power increases—simple, clear feedback that keeps you in control even during sudden stops.
The system meets or exceeds UNECE R21 and FMVSS 201 safety standards, so it’s designed for reliable operation in demanding conditions. With a maximum charging voltage of 12V DC and durable components proven in rugged environments, it’s built to handle serious towing without worry year after year.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
Gwendolyn Y.
6/15/2026
You picked the perfect spot for the knob! I do have one question, you mentioned that the drill size was incorrect in the instructions, what size did you up it to?
Gwendolyn Y.
4/9/2025
The Redarc looks great in your Jeep, Kent! What kind of trailer are you towing?
Kent
4/10/2026
It has now been a year since I installed the brake control. I’m not a daily user, however every time I pull the trailer the controller works flawlessly and it’s convenient.
Ken
6/6/2025
Overall the Redarc Liberty brake controller works well. Ive only had to stop hard once and Im happy to report I had no sway or misbehaving. I have managed to inadvertently brush the sensitivity control knob, decreasing the sensitivity. Just follow your departure checklist which includes checking the brake sensitivity and you will be fine. My only complaint is the illuminated dial. It just isnt bright enough, or the numbers arent bold or big enough, its hard to see what the sensitivity is set at without getting your face right up next to it. I would recommend this unit to a friend.
Jerry
4/11/2025
Outstanding! 5000 miles and has not. failed me once. I have found setting the controller just under halfway 4 works best for highway and around town. Bumping it to 5-6 is wonderful on mountain passes and keeps both the truck and trailer easy to control. Great product! If I had done just a little more research I would have discovered e-trailer even has a harness for my application and would not built my own. Highly recommend for a Tacoma!
Bryce D.
4/11/2025
Brooke M.
4/23/2025
That is super exciting about the mini-home! I wish you the best of luck with the overhaul - if you feel like sending in some pictures when you're done, we'd love to see them :)
Randy
4/23/2026
Great! It is simple to operate and responds appropriately. Thank you.
Lazer S.
4/23/2026
Chris
1/11/2026
The Redarc controller continue to impress me. This last year we went through NYS and the Adirondack Mountains where there are some long and serious downgrades and we also drove in a lot of stop & go traffic and I was always able to get the appropriate level of braking without locking the wheels. This is the best brake controller Ive ever used.
Chuck
2/14/2026
Still working great, no complaints.
Kenneth
7/19/2022
Great! The controller worked perfect and I was able to dial in the exact perfect resistance for the trailer brakes and everything towed very well. Unfortunately we sold our trailer but the brake controller still looks great in the car and I even got a compliment on how Stock or OEM it looked.
Ken H.
8/13/2021
Perfectly!
Simon F.
1/4/2026
Works flawlessly. Had a minor installation issue. Research technical support was super in resolving the issue
Bobby Q.
7/26/2023
After a year, still working good. We took the Pathfinder and the camper for a 450-mile round trip last weekend and it is still working as it should. The calibration takes a little longer sometimes when you go from trailer to trailer but Ive never had it not work eventually. It may be due to rust on our hitch or grounding on the car - still 100 satisfied.
Charles
4/26/2024
It’s been a year and it’s still working well. I was surprised to have it not work after changing the battery but all I needed to do was let the module relearn the same as when it was initially installed. All back to normal.
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Colin
4/22/2026
This has been working perfectly for me. Only issue I had was where I mounted the switch it could get bumped by my knee getting out the car. I 3D printed a small piece to prevent that.