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Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers

Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers

Item # RED69FR
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Universal wiring harness allows you to install the Tow-Pro brake controller in your without a factory tow package. Plug one end of the harness into the brake controller and the other end splices into your 's wiring. 1-800-940-8924 to order Redarc accessories and parts part number RED69FR or order online at Free expert support on all Redarc products. Guaranteed Lowest Price and Fastest Shipping for Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers. Accessories and Parts reviews from real customers.
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2006 Fleetwood Jamboree Motorhome - Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers

  • Trailer Brake Controller
  • Wiring Adapter
  • Redarc

Universal wiring harness allows you to install the Tow-Pro brake controller in your without a factory tow package. Plug one end of the harness into the brake controller and the other end splices into your 's wiring.


  • Universal wiring adapter provides a quick-disconnect for your electric trailer brake controller
    • No need to cut the plug off the brake controller to wire it directly to your vehicle
    • Makes it simple to plug and unplug controller for use in a different vehicle or for storage when you're not towing
  • Wire end splices into your vehicle's wiring
    • Use on a vehicle that does not have a factory tow package or is not equipped with a plug-in port
  • Connector end joins with the plug on your electric brake controller
    • Compatible with Redarc Tow-Pro brake controllers
  • Made in the USA
  • 2-Year warranty

TPH-025 Redarc Wiring Harness for Tow Pro Electric Brake Controllers

Video of Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Review of Redarc Trailer Brake Controller Parts - Universal Wiring Harness - RED69FR

Ellen: Hey everyone. I'm Ellen here at And we're going to be taking a quick look at the Universal Brake Wiring Harness for your Redarc brake controller. This allows you to connect your Redarc brake controller to any kind of vehicle even if it doesn't have a factory wiring harness. So you do have to connect these wires in. You will have to do some cutting and slicing to get those in place.

But it's pretty straightforward, so we'll talk about that in just a second. The other end is going to plug into that main unit on your Redarc brake controller. So just plugs in there and it's pretty easy.As far as the wires, you're going to have a white wire that goes to ground. The blue wire, which will connect to the brakes on your trailer. So this will run all the way back to your wiring socket on the back of your vehicle.

Red wire goes to your brake signal. So this goes to the actual electrical signal from your brake. And then this goes to a power source. Typically, from your battery or maybe from the fuse box on your vehicle. But a 12 volt power source, it's where that needs to go.

It does have complete instructions on how to get this installed, and some tips on how to do that. I would also suggest that you want to get some butt connectors to make those connections.And also a couple of zip ties to keep the wiring nice and tidy underneath your dash, so that it doesn't get tangled up with your pedals while you're driving, or your feet, or anything like that. You can find butt connectors and zip ties here at So if you want to pick those up while you're here, not a bad idea. So that's pretty much all there is to it for our look at the Universal Wiring Braking Harness.

It is made in the USA, and it is covered by a two-year warranty. I hope this video has been helpful in deciding if this is the right one for you. We do have a couple of custom fit options, so check those out if you have a appropriate vehicle, but this one should work for just about anything out there. Thanks for watching..

Customer Reviews

Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers - RED69FR

Average Customer Rating:  4.8 out of 5 stars   (116 Customer Reviews)

Universal wiring harness allows you to install the Tow-Pro brake controller in your vehicle without a factory tow package. Plug one end of the harness into the brake controller and the other end splices into your vehicle's wiring.


Overall, I’m completely happy with the REDARC Tow-Pro Liberty controller. The design and execution is elegant, the installation is fairly simple, and the completed appearance -in my opinion- is unmatched. I’m slightly annoyed that the REDARC product doesn’t come with some basic accessories you need, leaving you to hunt for and assemble things they know you’ll need like a fuse, fuse-holder, and the basic wiring harness to even connect to the REDARC Tow-Pro Liberty. So, if you’re price shopping different brake controllers I recommend factoring in about another $50 worth of accessories into the overall cost of the product when considering the REDARC Tow-Pro Liberty and comparing it to other brake controllers. The folks at, of course, make that simple by suggesting the items you’ll need automatically.

There is one “feature” of the REDARC Tow-Pro Liberty that is made VERY clear in the owner’s manual, that perhaps should be made clearer when advertising the product: The Brake Sense wire, which is the wire that connects to your brake lights and tells the controller you’ve activated the tow vehicle brakes, is bi-directional. In other words, in normal proportional operation it senses the 12 volts from your brake lights, but when in manual mode it also outputs 12 volts with the intention to activate your brake lights if you manually activate the REDARC controller. This matters a lot if your tow vehicle has factory automatic braking and collision avoidance or adaptive cruise control as the REDARC Tow-Pro Liberty can back feed these systems and cause a lot of damage. When the Mazda is in adaptive cruise control, or if the factory collision-avoidance system activates, the Mazda also activates the brake lights. A blocking diode is the solution and the placement is critical.

I have a 2020 Mazda CX-5 with AWD and their turbo 2.5-liter engine and the factory adaptive cruise control and collision-avoidance systems. The vehicle has a 2,000-lb towing capacity. I am towing a teardrop styled camping trailer that weighs 1,200-lbs, so I’m well within the capability of the vehicle. Trailer brakes just enhances the safety. Mazda is curiously quiet on their recommendation of how to properly wire this, and the dealership really wasn’t any additional help. This set me to find schematics and figure it out on my own.

The solution included two devices. The REDARC Tow-Pro Liberty, and the Tekonsha model # 118746 Trailer wiring module; both from I installed the Tekonsha trailer light wiring system first, then installed the REDARC controller. Instead of connecting the REDARC brake sense wire to the normal brake lights, I connected it to the positive side of the wire that feeds the rear center brake light on the Mazda. This is where I installed a 50-cent Schottky diode to allow the brake light to send +12v to the REDARC controller but prevent the REDARC controller from sending +12v back to the center brake light when the brake controller is in manual mode. I’ve included a schematic in this review as one of the photos; I hope this helps others.

The result is beautiful. You get the aesthetically pleasing factory appearance of the single-knob REDARC controller in the dash, that operates perfectly in both automatic proportional mode and in manual mode, AND the Mazda’s adaptive cruise control and automatic collision avoidance system still operates perfectly and will also automatically operate the REDARC controller and your trailer brakes. The REDARC Tow-Pro Liberty can install in any orientation, which makes installation a breeze, the proportional braking is smooth and confident. I’m extremely pleased with both products: The REDARC controller and the Tekonsha wiring model # 118746 and thrilled with who offered both at a reasonable price and reliable shipping/delivery.


This sure does look nice when done. I mounted it under the steering column and the knob as in the photos. The instructions were straight forward and installation was easy. I did make a custom panel for the control knob added a couple switches for future use) and I did make a custom bracket for the 7 wire trailer connector.

2016 Kia Sorento

I really like the simplicity of the controls and the look once installed. I am using this to tow my Aliner pop up and like to keep things simple without creating an eyesore on the interior of my car. I had a competitive bluetooth controller that I eventually gave up on. I had intermittent issues with brakes locking up, and even a few times not engaging at all. This controller brakes perfectly and looks great. I installed this on the fuse panel cover so if I sell my 2016 Sorento, I can potentially swap this out with a new cover if the new buyer does not want it.

This solved potential safety issues with my old controller, and towing is far less anxious due to the smooth braking.

I will follow up after one year, I hope this thing keeps working like it is now.


Not much to say on this product. It plugs in to the controller and then you wire it up. Obviously, if your vehicle has a plug in for a brake controller buy the harness that is specific to your vehicle. My car did not have that ability and I was going to have to wire it myself (no plug and play) and this did the trick.


I have around 10,000 miles of towing on this controller and I love it. This includes crossing several mountain passes. First, the installation is clean. No box hanging down to hit your leg. Second, the combined knob and button make it easy to adjust trailer brake intensity on the fly and it is very easy to just push the button if you need to apply trailer brakes by themselves.

Honda Odyssey

Installer was glad to have this hookup kit. the control dial fit into a blank accessory space on left side of dash and is convenient, looks professional, even without being the custom one for the Odyssey.


First time ordering from etrailer, so far so good. One of the items was out of stock so they offered an alternative. Awesome. I did not go with alternative and then watched to see if $xxx difference would be reflected on the pending charge to account. Which it was. No muss no fuss. I am converting my cargo trailer to camper. etrailer is now my go to site. Thanks guys.

2012 Toyota Tacoma

Definitely need this to make your install easy and plug and play with your vehicles harness adapter.


Used to hook up the Redarc brake controller (red model). You're going to need some way to plug into the controller, and this is the best option unless they sell a wire harness specifically for your vehicle. Wire is good, plastic is good. no problems.


It worked perfect for my application


Customer support at etrailer have been great! Thank you for getting me both the information and parts I needed. Thanks so much!!!


While this connector hooks to the controller with a solid connection, it only comes with 12 inches of wire. This is a remote mount device and should most definitely come with enough wire not to have to splice additional wire.

2018 BMW X5

Works perfectly. The installation is custom, as I put the little knob in the center console OF 2018 BMW X5 xdrive35i. The electronics package is mounted in the rear beside ht spare tire. It made a neat installation

2007 Chevrolet Silverado

It's small easy to install and comes with the wire info good controller. I got it for my 07 Silverado new body style.


Great product for towing a trailer. I buy a lot of parts from etrailer and they are always good quality parts. I would highly recommend etrailer to any and all who pull a trailer of some type.


Have not installed this yet, I'm not very savvy on the wiring so will have to consult more experienced people


Ezy to to will be putting a 7 wire plug so the brake controller works with the car


Great Product


Works as it should


The harness that I had to purchase should have been included with the brake controller unit as the units connectors are only able to be connected to with the manufacturers special made connecting pins not very user-friendly in my opinion


This particular item did not fit my needs not the products fault I did not even bother to return it

2010 Toyota Highlander

Served it’s purpose. Nothing fancy.


Super easy install. During calibration, if no trailer is connected, you will not see any lights. Instructions were a bit vague about this.


Worked perfectly


The kit had everything needed and worked perfectly. Very happy and I would recommend this kit.

Show More Reviews

Ask the Experts about this Redarc Accessories and Parts

  • How To Attach Red Wire On Redarc Tow-Pro Elite Trailer Brake Controller To 2012 Toyota Highlander
    In order to obtain the stop light signal for the 2012 Toyota Highlander you have a few different options. The best way to obtain the signal is to splice into the cold side of the brake pedal. The other option is to splice into the third brake light but this requires running a wire from the rear of the vehicle to the front where the controller should be located. The Redarc Tow-Pro Elite Trailer Brake Controller part # RED44FR needs to be within reach of the driver for proper operation per Redarc.
    view full answer...
  • Does Redarc Tow-Pro Liberty RED24FR Allow You To Manually Engage Trailer Brakes?
    Yes, the Redarc Tow-Pro Liberty # RED24FR you were looking at does allow you to manually apply the trailer brakes. This is done by simply pressing the control knob, and is useful for correcting trailer sway or if you are off-road and need to apply the brakes of your trailer before the brakes of your vehicle. Now the # RED24FR will get installed into your vehicle with either the Universal Harness # RED69FR or a vehicle wiring harness that would plug into the factory trailer brake controller...
    view full answer...
  • Which Harness to Install a Redarc Tow Pro Liberty in a 2021 Ford Ranger
    Yes. In order to install the Redarc Tow Pro Liberty # RED24FR on your 2021 Ford Ranger you'll want to use the Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers # RED69FR. This harness will allow you to hard wire in a Redarc controller on your Ranger.
    view full answer...
  • Wiring Harness For Redarc Tow-Pro Liberty in 2012 Toyota 4Runner
    The correct wiring harness for your 2012 Toyota 4Runner and the Liberty brake controller is the universal splice-in option: - Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers # RED69FR - Redarc Tow-Pro Liberty Brake Controller # RED24FR I verified this with the manufacturer, Redarc, for you.
    view full answer...
  • Universal Wiring Harness for Use with Tow Pro Liberty Brake Controller
    The universal wiring harness to use with the Tow Pro Liberty part # RED24FR is the part number # RED69FR. This plugs into the module and gives the standard 4 wire brake controller wire setup.
    view full answer...
  • Parts Needed to Install Redarc Tow Liberty In 2013 GMC Sierra
    Since your 2013 GMC Sierra has blunt cut wires under the dash that get wired to a brake controller the correct install harness you'd need is the part # RED69FR to install the Tow Pro Liberty brake controller # RED24FR. I attached a help article on installing a brake controller on a GM truck like yours for you to check out as well.
    view full answer...
  • Is the RedArc Liberty Compatible with a 2012 Chevy Silverado
    The RedArc Liberty # RED24FR is compatible with your 2012 Chevy Silverado 2500 HD and is a good value priced brake controller that will provide with proportional braking for trailers with 2 or fewer axles. I really love RedArc controllers because they install out of the way and provide you with very responsive braking. The only downside of the Liberty is that there are no adapters available that allow for plug and play installation so you'd need to use the Wiring Harness for Redarc Tow-Pro...
    view full answer...
  • How Does Redarc Tow Pro Liberty Install in Vehicle with Brake Controller already Wired In
    To install the Redarc Tow Pro Liberty # RED24FR in your 2007 Toyota Tundra that has a brake controller wired in currently you'd need the install harness # RED69FR which has the four wire colors you mentioned and would wire in color for color.
    view full answer...
  • Redarc Tow-Pro Liberty Brake Controller for 2018 2WD GMC Canyon
    Yes, I do agree with your choice it sounds like you have done your research. The Redarc Tow-Pro Liberty Brake Controller item # RED24FR is a great brake controller and would work well for your application. It is a proportional brake controller that works with electric or electric over hydraulic brakes. You will need the Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers item # RED69FR for your 2018 GMC Canyon. The main unit of the brake controller is able to be mounted...
    view full answer...
  • Redarc Tow-Pro Liberty Brake Controller Installation On a 2022 Chevrolet Blazer With Factory Towing
    I was able to find the same information as you in the owners manual for your 2022 Chevrolet Blazer that states the 4 blunt wires behind the headlight switch. I was able to find where one person found the wiring near where the brake pedal mounts(see image). Once you find the wiring you will be able to install a Redarc Tow-Pro Liberty Brake Controller # RED24FR with a Universal Wiring Harness # RED69FR.
    view full answer...
    Image 1 for
  • What Is Green Wire for on Factory Brake Controller Harness for 2019 Toyota 4Runner
    In regards to the green wire on the factory harness, this won't be used. It's for an illumination circuit that is not used on most newer brake controllers. The correct harness you need to install the Redarc Tow-Pro Elite Trailer Brake Controller part # RED44FR on a 2019 Toyota 4Runner is the Plug-and-Play Wiring Harness for Redarc Tow-Pro Classic or Elite Trailer Brake Controllers part # RED49FR . If you want to use the provided factory harness you can instead use the Universal Wiring...
    view full answer...
  • How To Remove Control Dial From Redarc Tow-Pro Liberty Brake Controller
    The control knob on the Redarc Tow-Pro Liberty Brake Controller part # RED24FR is held in place with friction. The initial install of the control knob will need to be done with the dial set to 0 but if you mess up you can simply pull the knob off and retry. Removing the head a few times won't be an issue but if you do this persistently it could lead to a loss of friction and loose fit.
    view full answer...
  • Recommended Brake Controller for 2022 Kia Telluride
    Redarc is a great brand and a great choice for a brake controller in your 2022 Kia Telluride. I would specifically recommend the Redarc Tow-Pro Liberty Brake Controller # RED24FR and Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers # RED69FR. This proportional brake controller uses a 3-axis accelerometer so it can be mounted anywhere at any angle. The control knob won't take up any space inside of your vehicle and allows for quick adjustments of the braking power. I...
    view full answer...
  • Install Harness for Redarc Tow-Pro Liberty in 2012 Nissan Titan
    The Redarc Liberty part # RED24FR does not come with a universal wiring harness but you can get that separately with # RED69FR for something that you could splice to factory wiring. Or for a specific harness that plugs into the factory port under the dash of your 2012 Nissan Titan you'd just want the part # RED39FR.
    view full answer...
  • Installation of Redarc Tow-Pro Liberty Brake Controller on 2013 BMW X3 with Aftermarket 7-Way
    The Redarc Tow-Pro Liberty Brake Controller # RED24FR is a great option. You will simply need the Wiring Harness for Redarc Tow-Pro Liberty Trailer Brake Controllers # RED69FR and the # 5506 for your wiring connections to make it compatible with your 7-way.
    view full answer...
  • Can Redarc Tow Pro Liberty Brake Controller Install in 2017 Chevy Express Van 2500
    The Redarc Tow Pro Liberty part # RED24FR can install in your 2017 Chevy Express Van 2500 with the universal install harness # RED69FR. Your vehicle has the blue output brake wire already ran from the back to the front. It is located under the dash near the emergency brake pedal. If your vehicle has a round plug with a cap inside the driver's side frame rail instead of a bundle of wires in the jack storage compartment, use part # 30955 to add the 7-way.
    view full answer...
  • Length of Universal Wiring Harness For Redarc Tow-Pro Trailer Brake Controllers
    The Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers # RED69FR is 20" long from the end of the connector to the end of the wiring. This is the harness that is included with the Redarc Tow-Pro Liberty Brake Controller # RED52VR and the Redarc Tow-Pro Elite Trailer Brake Controller # RED44FR.
    view full answer...
  • Installation of Redarc Tow Pro Brake Controller on 2021 Ford Ranger
    Assuming your 2021 Ford Ranger is equipped with the factory 7-way trailer connector, the install of a # RED44FR Redarc Tow-Pro Elite would be identical to what's shown in the linked video. May I make a suggestion though? Unless you really need the user-control mode offered by the Tow-Pro Elite which would usually be used in low-speed off-road situations, there's no reason not to save a few dollars and go with the Redarc Tow-Pro Liberty, part # RED24FR which would work the same as the...
    view full answer...
  • Is There Better Value Brake Controller than Redarc Tow Pro Elite
    The Tow Pro Elite Brake Controller # RED44FR is a really great brake controller that would work really well in your Winnebago Adventurer with the tow dolly you mentioned that has electric brakes, but if you wanted the best value you'd want the Tow Pro Liberty part # RED24FR which comes in at a much better price due to it not having the time delayed option of the Elite. The proportional setting would be what you'd want to use and is in every way better than time delayed so it doesn't make...
    view full answer...
  • Wiring Harness Required To Connect Redarc Brake Controller To a 2021 Ford E-450 Class C Motorhome
    To install the Redarc Tow-Pro Liberty Brake Controller # RED24FR on your 2021 Forest River Sunseeker with the Ford E-450 chassis you will need to make your own harness as one is not available. This is easily done by connecting the Redarc Universal Wiring Harness # RED69FR with the Tekonsha Custom Wiring Adapter # 3034-S. The butt connectors included with the Tekonsha kit will allow you to connect the wiring making a custom harness for your Sunseeker. Tekonsha red wire to Redarc red...
    view full answer...
  • Can The Redarc Tow-Pro Liberty RED24FR Be Installed On A 2019 Ford Ranger W/ Curt 7-way Connector?
    You can absolutely install the Redarc Tow-Pro Liberty # RED24FR in your 2019 Ford Ranger that has the Curt 7-way Connector Harness # C56431 installed, you will just need the universal wiring harness # RED69FR. While Ford did not run a trailer brake controller port for installing a trailer brake controller like some other vehicles have, they did run the four wires you need. These will be located underneath the dash near the driver side wheel well and will be bundled together. Inside the...
    view full answer...
  • Recommended Brake Controller and 7 Way Wiring Harness for a 2021 Toyota Highlander XLE
    From what I could find, the 2021 Toyota Highlander does not come with a port under the dash for an brake controller. With that being said, you will need to use our Universal Installation Kit for Trailer Brake Controller # ETBC7 to get a brake controller up and running. This will include all the wiring needed as well as the 7 Way plug for the back of your vehicle. Speaking about the wiring, the red wire that needs to be tied into the brake switch wire, like that on the Universal Wiring...
    view full answer...
  • Can I Use a Redarc Tow Pro Liberty on a 2002 Chevy Silverado
    Yes. You can install the Redarc Tow Pro Liberty # RED24FR in place of your old Tekonsha controller on your 2002 Chevy Silverado without any issues and you'll just need a few extra parts. You'll want to use the Tekonsha Custom Wiring Adapter for Trailer Brake Controllers - Pigtail - GM # 3025-S and splice it into the Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers # RED69FR to complete the installation. I've linked some review videos of these parts for you to have...
    view full answer...
  • Will the Trailer Brakes Activate On a 2015 Toyota Highlander with Pre-Collision and Dynamic Cruise
    The trailer brakes will be activated automatically alongside with the vehicle's automatic braking from the pre-collision and dynamic cruise control on a 2015 Toyota Highlander when you splice into the stop light switch circuit at the brake pedal. If you want to avoid this you'd have to run a wire from the center stop lamp. The Redarc Tow-Pro Elite Trailer Brake Controller part # RED44FR will be a great option and all you will need to complete this install is the Brake Controller Install...
    view full answer...

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Info for this part was:

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Video by:
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Employee Kathleen M
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