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Curt TriFlex NEXT Trailer Brake Controller - 1 to 4 Axles - Proportional
Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In

Part Numbers: C24VV,C51392

Retail:$192.77
Our Price: $138.89
You Save: $53.88
Trailer Brake Controller

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Curt TriFlex NEXT Trailer Brake Controller - 1 to 4 Axles - Proportional
part number: C24VV

Simple and compact, this proportional brake controller has an intuitive design that's easy to use. Includes a simple digital display, 10 gain settings, a pinch-trigger manual override, and built-in safety features.

Features:

  • Brake controller activates trailer brakes in proportion to your vehicle's braking action
    • Automatically adjusts trailer's braking based on deceleration of tow vehicle
  • Simple digital display shows you the braking and sensitivity settings as well as error codes
  • Intuitive controls keep settings within easy reach
    • 10 Levels of boost let you adjust initial braking power and aggressiveness for smooth, safe braking
    • Pinch-trigger manual override allows you to control trailer sway or stop in emergencies
  • Triple-axis, motion-sensing accelerometer provides highly responsive, smooth stops
    • Automatically increases power when going downhill and decreases when going uphill
  • Integrated safeguards protect your vehicle, the trailer, and the controller
    • Runs continuous diagnostic checks to alert you to any potential problems
    • Minimizes drain on car battery by entering sleep mode after 5 minutes of inactivity
    • Keeps trailer brakes from overheating by reducing power output to them during prolonged stops
    • Defends brake controller and trailer breakaway systems against shorts
    • Prevents positive and negative power reversal with built-in polarity protection
  • LED display shows power adjustments in 0.5 increments
    • Brightness is adjustable for optimal visibility
  • Compatible with ABS brakes, cruise control, low-voltage wiring, multiplex wiring, and PWM systems
  • Automatic leveling lets you mount at any angle
    • Mounting bracket and hardware included
    • Plug-in, vehicle-specific brake control adapter (sold separately) can be used to reduce installation time on certain vehicles


Specs:

  • Application: trailers with up to 4 axles (8 brake assemblies)
    • Compatible with electric or electric-over-hydraulic trailer brakes
  • Dimensions: 4" long x 3-1/8" wide x 1" tall
  • Limited lifetime warranty


LED Display

The LED display on the TriFlex is large and easy to read at a glance. It will show you what setting the brake controller is on as well as give you information for troubleshooting. You can adjust the screen brightness or trigger night mode so it won't glare obnoxiously on your dash.


To change any of the settings, press the silver mode button on the front of the brake controller and which mode you are currently on will show on the LED display. When you're on the setting you want to adjust, use the black rocker switch next to the mode button to adjust it up or down.


Gain Adjustment

Gain control lets you set the maximum amount of power that will be applied to your trailer's brakes, adjusting in increments of 0.5. How much braking output you need is determined by the weight of your trailer; a heavier trailer will need more power to bring it to a stop. You want to go as high as you can without the trailer brakes locking up. Typically, the gain is only readjusted when you experience changing road conditions or if the weight of your trailer changes. To get more power to your brakes, press the upper rocker switch. To decrease the gain, press the lower switch. When you make your adjustment, the gain setting will show on the LED screen for 10 seconds and then go into sleep mode.


Load Control

Once you have the gain set, you can fine-tune your braking by adjusting the load control on a scale of 1 to 9. This controls the aggressiveness of your trailer's braking, meaning how quickly the brakes reach the maximum braking level. Load control can get the braking power to your trailer faster and with more intensity so that it doesn't push your tow vehicle forward. If your vehicle takes too long to come to a stop, increase the setting by pressing the upper rocker switch. If it stops too abruptly, decrease the setting by pressing the lower switch. You can alter the setting to suit your driving preferences or to improve handling based on changing road conditions or varied trailer loads.


Pinch-Trigger Manual Override

The TriFlex comes with a easy-to-reach, pinch-trigger manual override, great for stopping sway or controlling your trailer's momentum in emergencies. To engage the manual override, just push in the trigger. This will activate the trailer's brakes and brake lights without you having to apply the brakes on your tow vehicle, perfect for limiting trailer movement while you're cruising.


Safety Features

The TriFlex offers key safety features to prevent damage to various components of your towing setup. This starts with built-in protection against shorts and positive and negative power reversal, as well as continous diagnostic checks to alert you to any potential problems as they come up. To minimize the drain on your vehicle's battery, the TriFlex will automatically go into sleep mode after 5 minutes of inactivity. Sleep mode will turn off again the moment you press the brake pedal.


Curt TriFlex NEXT

Quick Installation

Automatic leveling means you can mount the unit at any angle. Your mounting options are limitless, so long as you can still easily access the controller and the manual override. The included bracket is designed to mount the brake controller flush to the dash so it takes up almost no space at all.


If your vehicle already has a plug-in brake controller wiring harness, just connect the unit to it. Otherwise, you will need to purchase a vehicle-specific wiring harness (sold separately) to plug into. If a harness is unavailable for your vehicle, hardwiring will be necessary.


Note: If a custom brake control wiring adapter is not available for your vehicle, one of the following will be required:

20-Amp circuit breaker (9506P - sold separately) for 2- to 4-brake applications

30-Amp circuit breaker (38630 - sold separately) for 6- to 8-brake applications


See also etrailer.com's exclusive 7- and 4-way brake control installation kit (ETBC7 - sold separately) if you don't already have a 7-way plug at the back of your vehicle.


Proportional Braking

What is proportional Braking

The Curt TriFlex NEXT brake controller comes equipped with proportional braking to give you the best towing experience. Proportional braking means that your trailer brakes mimic your tow vehicle's brakes. If you slam on the brakes in your vehicle, your trailer brakes will activate with the same intensity; if you brake lightly, your trailer brakes lightly too. The trailer's braking is in proportion to your vehicle's braking. This saves wear and tear on the tires and the brakes on both your vehicle and trailer.


The TriFlex uses an internal 3-axis accelerometer to sense how your vehicle is braking so it can send the right amount of braking power to your trailer. It measures the inertia of your tow vehicle and activates the trailer's brakes to slow at the same rate. The result is uniform braking across your towing setup. No push-pull action - just smooth, proportional braking every time.



51146 Curt Tri-Flex NEXT Proportional Trailer Brake Control

Replaces Curt 51140



Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In
part number: C51392

Install your Curt electric trailer brake controller quickly and easily with this custom wiring adapter. Simply plug one end of the adapter into your brake controller and then plug the other end into the built-in port beneath your vehicle's dash.

Features:

  • Plug-in wiring adapter allows for quick, simple installation of your electric trailer brake controller
  • No cutting or splicing required
    • Custom connector end plugs into the built-in port beneath the dash of your vehicle
    • Other end plugs into the back of your electric brake controller
  • Compatible with time-delayed and proportional brake controllers from Curt
    • Brake controller must have built-in plug for adapter to connect - will not work on controllers with pigtail wiring harnesses
  • 2' Long, 12-gauge wires have protective covering to deter damage
  • Limited 1-year warranty


Installation of Curt Brake Controller Adapter

To install your Curt electric brake controller, you need to connect the wiring of the controller to your vehicle. Certain auto manufacturers offer pre-wired options, typically known as tow packages, wherein wiring is run for you from the dash to the trailer connector on the back of your vehicle. When this is done, a port is installed at your dash so that you can easily plug in a brake controller.


This adapter plugs into the port on your vehicle's built-in brake control wiring harness. The harness is located underneath the dash, to the left of the steering column, and it is taped to another harness near the emergency brake pedal.


No hardwiring is required to install this adapter. After you plug it into the factory port, you simply plug the other end of the adapter directly into your electric trailer brake controller. Because there are no wires to connect, installation is not permanent. You can unplug and remove your brake controller at any time to transfer it to another vehicle or securely stow it away.



51392 Curt Quick Plug Brake Control Adaptor Harness

California residents: click here




Customer Satisfaction Score:


Customer Reviews

Curt TriFlex NEXT Trailer Brake Controller - 1 to 4 Axles - Proportional - C24VV

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In - C51392

Average Customer Rating:  4.8 out of 5 stars   (99 Customer Reviews)

Simple and compact, this proportional brake controller has an intuitive design that's easy to use. Includes a simple digital display, 10 gain settings, a pinch-trigger manual override, and built-in safety features. Install your Curt electric trailer brake controller quickly and easily with this custom wiring adapter. Simply plug one end of the adapter into your brake controller and then plug the other end into the built-in port beneath your vehicle's dash.

by: Lee04/22/2024

Arrived as planed and was much smaller then my old clunky one. The custom cable harness was easy to install. Finding a flat spot to mount the controller took the longest to find the perfect spot. I gave a five stars because every was as it said. (Plug and play)



by: Michael09/07/2020

The Curt Custom Wiring Adapter for the 2017 Honda Ridgeline worked perfectly for the installation of my new Curt Spectrum Trailer Brake Controller. Thanks etrailer!Thanks Curt!

Michael

9/8/2021

The Curt Spectrum Trailer Brake Controller has been working flawlessly. I am pleased that the custom harness made the install so simple.



by: Thomas 05/19/2024

Excellent product. Easy install. Customer service was exceptional with real-time communications every step of the way. Highly recommend e-trailer for any of your trailering needs.



by: Loren 05/14/2024

Excellent product, easy installation just as described. Good quality as expected from E trailer.



by: Chris03/29/2024

The product I ordered was not available. There was a suggestion for another product, without the full knowledge that there are multiple other products, and I was only given one choice. It is what it is, if I knew of options, I would’ve made a different choice. Not a great company in terms of knowledge and service



by: Adam 02/07/2024

The control works great. The reason for knocking off a star is that the control rattles whenever there is a vibration in the truck. While annoying, it doesn't affect the operation.



by: Dennis 02/11/2024

I have not used this device yet but I have installed it. It looks kool. I hope installation orientation doesn't matter too much.



by: Henry 03/15/2024

The service and speed of delivery has always been great, thank you E Trailer.



by: Dan 03/29/2024

Never a problem with etrailer



by: Mitchell05/20/2024

Josh was excellent in listening and helping discuss my options. The trailer brake improved my driving and safety tremendously with a 14k dump trailer. Thanks, Josh.



by: Frank 04/20/2024

Extremely easy to install and small enough to not be in the way. Works great as well….highly recommend.



by: Mike05/28/2024

Scratched screen straight out of the package/from the factory. Haven't installed yet. Super fast shipping!!



by: Craig 05/14/2024

As advertised- very easy to install!



by: Tom 04/09/2024

Was easy to install and works well.



by: Mickey 04/20/2024

Good ..except for shipping thru mail.



by: Damon 04/09/2024

Couldn’t get any easier to install. Took less than ten minutes.



by: Tim 10/13/2023

Works good, just installed, trailer brakes smooth and as it should.



by: Chris 04/05/2024

Everything got here fast, and looks to be exactly what I need. Thank you!



by: Richard 03/28/2024

I have not installed it yet, but it looks good and thank you for the fair shipping Richard



by: Bill 03/13/2024

Perfect communication and quick deliver y!



by: John 03/13/2024

Great fit works as described



by: Hugh05/04/2020
2018 Ford Transit Connect

Installed the Curt Triflex in 2018 Honda Ridgeline RTL-E and was completely easy with the C51392 Honda specific wiring adapter that plugged into the Honda pre-wiring just above and left of the emergency foot brake as you look at the pedals. Like how the controller fits nicely in front of the shifter flat on the center console storage tray with a bit of Velcro to hold it and prevent movement in transit and matches the black interior trim well (didn't use the metal bracket that came with it). Have had great luck with Curt products (hitches, adapters, etc.) and this product is very well thought out. Too early to tell about long term use though.



by: Ned b03/29/2014
Honda

Just finished the install. It was nice to be assured that I had everything I needed to finish the job before I got started. Honda didn't make it easy.



by: John H.06/05/2019
2019 HondaPilot

This part is listed to fit a 2019 Honda Pilot. I needed one for a 2019 Honda Passport;(basically the same vehicle); however since the Passports just came out in about February no one could tell me if it would work on the Passport. So I took a gamble and ordered this wire. Well I can confirm that this part does work on the 2019 Honda Passport. The hardest part was reaching the plug under the dash and getting this wire to plug into it, all without any room and only being able to get one hand up under dash. Wire made hooking up brake controller a lot easier than direct wiring.



by: Jonathon 10/19/2019
2019 HondaPilot

This fit my 2019 Honda Pilot perfect. Plugged right in under the dash. The plug branches out of another wiring harness directly above your OBD plug in. On the left side of dash. You will have to lay down and get your head near the pedals to see it tucked up in there. Very easy install, glad I went with etrailer. Made it simple.


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Ask the Experts about this Trailer Brake Controller
Do you have a question about this Trailer Brake Controller?


  • Is the Curt TriFlex Brake Controller Compatible with a 2014 Dodge Durango and 2010 Coachmen 290BHS
  • Yes, the Curt TriFlex Brake Controller, # C24VV, and the Custom Wiring Adapter, # C51446, will work with your 2014 Dodge Durango and your 2010 Coachmen 290BHS travel trailer. Since your Durango has the factory tow package, the installation will be easy with the plug-in custom wiring adapter. The TriFlex brake controller was designed to work with trailers with up to 4 axles and 8 brake assemblies and it is compatible with electric and electric-over-hydraulic trailer brakes. The brakes
    view full answer...

  • Troubleshooting Curt Triflex # C24VV Issues After Unit Overheating
  • First, check the display on your Curt Triflex # C24VV for any error codes that come up with applying the brakes with your trailer connected. If you get an error code, you can reference the user guide to find a potential solution. If you don't have any error codes showing on the display to help you diagnose the issue, I would start by checking the wiring on your vehicle and on your trailer, particularly the blue brake output wire. Check the wires for any signs of damage such as exposed wires
    view full answer...

  • Estimated Time to Install a Trailer Brake Controller on a 2014 Chrysler Town and Country
  • There are a few things that are going to affect installation time of a brake controller on your 2014 Chrysler Town and Country. If the van already has a 4-Way connector, that will trim down the time a little. Depending on how you want to route the wiring will affect the overall installation time as well. I would say for a novice maybe 3 hours as an educated guesstimate. To install a brake controller on your van you will first need to have a 4-Way trailer connector, # C56331, if the van
    view full answer...

  • Will The Curt TriFlex Trailer Brake Controller # C24VV Work as a Replacement For Old Tekonsha?
  • Yes, the Curt TriFlex Trailer Brake Controller # C24VV can be used to replace the Tekonsha controller in your 2002 Dodge Ram 1 ton pickup. I do recommend wiring in the Pigtail # C51515 so you will be able to easily disconnect the controller in the future. This will help in the event you have a wiring issue down the road or wish to move the controller to a new truck.
    view full answer...

  • Troubleshooting Curt TriFlex Brake Controller Not Recognizing Trailer When Connected
  • It sounds like there may be a damaged wire on your 2006 Dodge Ram 2500 Laramie. Since the Curt Triflex # C24VV only has the single red light we know the controller is getting power but with the 2nd red light not illuminating when connecting to the trailer the brake wire portion is not completing the circuit. You can use a Test Light # PTW2993 to check at the connector to verify if the damaged wiring is on the truck or trailer. Then you can move in either direction with the test light to
    view full answer...

  • Manual Override on Brake Controller Not Working on 2012 Chevy Silverado
  • There are some tests you can do on an aftermarket brake controller to determine if it is the problem. In the truck cab you will need to sever the blue wire several inches from the back of the controller. Then use a circuit tester such as # PTW2993 to test the end of the blue wire coming out of the controller. It should only have power when you apply the manual override. If it shows power at idle, then there is something wrong with the controller and it will need to be replaced. If it
    view full answer...

  • Plug and Play Adapter for a Curt Brake Controller on a 2018 Toyota Tundra
  • Yes, there is a plug in adapter to install the TriFlex NEXT # C24VV on your 2018 Toyota Tundra. You will need the plug-in adapter # C51455. The plug-in adapter connects behind the access panel to the right of the steering column. I have attached a picture below to help you find it.
    view full answer...

  • Why Does the Curt TriFlex Show Power Figures Without a Trailer Connected
  • According to the owner's manual for the Curt TriFlex Trailer Brake Controller part # C24VV, the controller will display output settings without a trailer connected. I have attached for you below an excerpt from page 5 that explains this. "The maximum output setting is shown on the display when a trailer is connected and the brake pedal is pressed or the manual control is actuated. If a trailer is not connected the output setting is flashed when the brake pedal is pressed or the manual
    view full answer...

  • Troubleshooting Curt TriFlex Brake Controller that Flashes 1.0 With No Trailer Connection
  • This is a common issue when there is corrosion built up on the brake output pin of the 7-way. What this does is cause the controller to sense a slight amperage draw which confuses it into thinking a trailer is connected. The other thing you can try is unplugging the controller and plugging it back in. Sometimes the Curt controllers just need to have a hard reset to function normally.
    view full answer...

  • Should Curt TriFlex Brake Controller Cause Shaking During Stopping
  • A brake controller should have no affect on the way the truck brakes when a trailer isn't connected. I'd recommend disconnecting it though right now to see if somehow the wiring is causing an issue. If it is the wiring it'll be the red wire of the controller being connected to the wrong circuit. It needs to be on a circuit that only sees voltage when the brakes are applied. It almost sounds like you have warped brake rotors though as that's typically what causes a vehicle to shake or
    view full answer...

  • Troubleshooting D.C and C.C. Messages on Curt Triflex Trailer Brake Controller
  • I recommend starting by checking both the tow vehicle side and trailer side connectors. Check to make sure that they are free of any debris or corrosion, cleaning out as needed. The D.C. message you are getting on the Curt Triflex # C24VV indicates no trailer brakes. This is typically caused by a loss of trailer connection, unplugged or bad wiring. If there is corrosion inside the vehicle or trailer connector, this will lead to a bad connection which might be what is causing these error
    view full answer...

  • Curt Triflex Brake Controller Randomly Clicking
  • Is the controller showing any error codes when the clicking is heard? The easiest place to begin would be to reboot the controller. Unplug the harness from the rear of the controller for a few minutes then plug the controller back in, which could possibly fix the problem. If that doesn't solve the problem, disconnect the red wire feeding the controller. If the problem still occurs the controller is faulty and should be replaced. If temporarily disconnecting the red wire corrects
    view full answer...

  • Parts Needed to Install a Curt and Tekonsha Brake Controller in a 2014 Ram
  • You do NOT have to install the Mopar brake controller in your 2014 Ram 1500, you can use an aftermarket controller like the Curt Triflex Brake Controller part # C24VV. All you would need for the installation would be the Curt Custom Wiring Adapter # C51453 that you also referenced. To see how this harness installs in your vehicle check out the installation instructions I attached. If your old controller was a Tekonsha brand the harness you would need instead is the Tekonsha Custom
    view full answer...

  • Curt TriFlex Brake Controller # C24VV Installation in 2014 GMC Acadia
  • To install the Curt TriFlex Brake Controller # C24VV in a 2014 GMC Acadia without factory trailer connector you will need the brake controller unit and wiring harness, parts # C24VV and # C51515, along with a brake controller install kit, part # ETBC7. Your vehicle needs to have a working 4-pole flat connector in order to install the # ETBC7. The 4-pole plugs into the supplied 7-way. If your Acadia has the tow package with factory 7-way you will not need the # ETBC7. GMC no longer
    view full answer...

  • How Does Curt TriFlex NEXT Brake Controller Mount
  • You're right, the mounting bracket is unique (in a good way) for the Curt TriFlex NEXT Trailer Brake Controller # C24VV. The bracket is smaller and all you do is put the included adhesive tape on the bracket and stick it wherever you like under your dash. Screws are also included and you can use them with the adhesive to mount the bracket under your dash. Then you'll simply slide in the TriFlex NEXT controller and that's it. This type of bracket takes up less space than the normal
    view full answer...

  • Recommended Plug and Play Adapter for a Curt Brake Controller on a 2019 Ram 1500
  • For your 2019 Ram 1500 the Curt TriFlex NEXT Trailer Brake Controller item # C24VV can be installed with a plug and play adapter using the Curt Custom Wiring Adapter item # C51458. The port you need is right above where your right foot would be covered in a foam tape. I have attached a picture below to help you find it.
    view full answer...

  • Where Does Red Wire from Curt Trailer Brake Controller Connect to on 2017 Hyundai Santa Fe
  • When installing a trailer brake controller like the Curt TriFlex # C24VV, you will need to connect the red wire from the controller to the cold side of the brake light switch in your vehicle. I recommend using a circuit tester like # PTW2993 to determine which wire receives power only when the brake pedal is pressed. This will indicate the correct wire to connect to. Based on my research, this wire should be red in your vehicle, so you can start by testing this one first. Because vehicle
    view full answer...

  • Brake Controller Recommendation and Install for a 2014 Ford F-150
  • If you have a factory 7-way connector at the rear of your 2014 Ford F-150 I would recommend the Curt Brake Controller part # C24VV and the install harness part # C51436. These two parts will make installation very easy as the harness plugs into the controller and then the other end plugs into the port under your dash. If you have a factory 4-way connection at the rear of your vehicle you will also need the part # 37185 to complete the install. Check out the FAQ article to the right for
    view full answer...

  • Troubleshooting Curt TriFlex C24VV Not Getting Power After Changing Vehicle Battery
  • I am sorry to hear that. By chance was the Curt TriFlex Trailer Brake Controller # C24VV hardwired into your 2003 Lincoln Navigator? If so there is a power wire running from the controller to the battery and it more than likely did not get reconnected which is why the controller no longer has power. If your controller was installed using a plug in wiring harness then you need to check the engine bay fuse box for a blown fuse as that would be the next most likely cause. Let me know
    view full answer...

  • Installing A Curt Spectrum Trail Brake Controller In A 2020 Honda Passport
  • Hi Louis, Are you not able to find the factory connector to plug in the Curt Custom Wiring Adapter # C51392? If so I've attached a video of another brake controller wire harness that plugs into the same connector on a 2019 Passport to help you find the connector. You can skip past the intro to minute mark 4:49 to see where the connector sits. If you're having a different issue then let me know and I'd be happy to help so you can get your Curt Spectrum Trailer Brake Controller # C51170
    view full answer...

  • Correct Curt Brake Controller Adapter Harness for 2023 Honda Pilot
  • Correct, the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51392 is a fit for all models of a 2023 Honda Pilot. It will allow you to use a trailer brake controller like the Curt Assure Trailer Brake Controller part # C49UR which is what I recommend. This is an excellent setup that allows for towing a trailer with brakes without any splicing required. The proportional design of the controller will provide a smooth braking feel and the adjustable display will ensure you
    view full answer...

  • Install Harness for Curt Assure Brake Controller for 2021 Honda Ridgeline
  • To install the Curt Assure brake controller part # C49UR in your 2021 Honda Ridgeline the correct install harness is the part # C51392. The other harness was designed for other vehicles and not yours.
    view full answer...

Info for these parts were:

Employee Leah B
Edited by:
Leah B
Employee Lindsey S
Written by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

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