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  1. Trailer Brake Controller
  2. CURT
  3. Electric
  4. Electric over Hydraulic
  5. Proportional Controller
  6. Up to 4 Axles
Curt TriFlex NEXT Trailer Brake Controller - 1 to 4 Axles - Proportional

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

Item # C24VV
Retail:$164.95
Our Price: $124.95
You Save: $40.00
Trailer Brake Controller
Shipping Weight: 0.67 lbs
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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. Great Prices for the best trailer brake controller from CURT. Curt TriFlex NEXT Trailer Brake Controller - 1 to 4 Axles - Proportional part number C24VV can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (37)
  • Q & A (0)
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CURT Trailer Brake Controller - C24VV

  • Electric
  • Electric over Hydraulic
  • Proportional Controller
  • Up to 4 Axles
  • CURT
  • LCD Display
  • Dash Mount
  • Under-Dash Box
  • Automatic Leveling
  • Up to 360 Degrees

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

Installation Details C24VV Installation instructions



Customer Satisfaction Score:


Customer Reviews

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

Average Customer Rating:  4.7 out of 5 stars   (37 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.

by:

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:

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:

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:

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:

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



by:

Never a problem with etrailer



by:

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



by:

Was easy to install and works well.



by:

Good ..except for shipping thru mail.



by:

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



by:

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



by:

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



by:

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



by:

Perfect communication and quick deliver y!



by:

Great fit works as described



by:

install is a breeze!



by:

Hey guys thanks for all the help.
I submitted
a couple of questions that were quickly answered and Jon gave me a couple of suggestions that I did wind up choosing. They even came with detailed directions for my paticular truck.
Thanks again for the awesome service and help



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She was great



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Show More Reviews

See what our Experts say about this CURT Trailer Brake Controller

  • Locating Cold Side of Stop Light Switch on 2013 Chevrolet Equinox
    On your 2013 Chevy Equinox there is only one cold stop light switch wire going to the body control module (BCM). From there, it goes to both the center high mounted stop light (CHMSL) and the tail lights. From what I found, the wire you are looking for is typically a yellow wire above the brake pedal, so I would start by testing that wire with a circuit tester like # PTW2979. It should only be hot when the brake pedal is applied. This is connected to the red wire on a brake controller,...
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  • Troubleshooting Curt TriFlex Brake Controller Flashing After Ignition Is Turned Off
    It is not normal from what I can read in the instructions for your Curt TriFlex Trailer Brake Controller # C24VV to flash just because your 2019 GMC Sierra 1500 ignition is switched off. To determine if you have a defective controller you will want to take a Test Light # PTW2993 to the red wire of your brake controller to determine if the brake switch on your Sierra is activating. This would cause your controller to flash if the brake switch or wiring to it is faulty. I do see that...
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  • Is It Normal For Curt TriFlex C24VV To Read .5 When Apply Brakes With No Trailer Connected?
    I reached out to my contact at Curt and the display you are getting on your Curt TriFlex Trailer Brake Controller # C24VV you have is perfectly normal. When you press the brake pedal in your truck the controller will read the power setting you have the controller set to. You can see this at the 3:20 minute mark of the included video when Ryan presses the brake pedal with no trailer connected.
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  • Recommended Brake Controller And 7-Way Connector For A 2016 Toyota Highlander
    The first item you will need is the brake controller and harness. I recommend the Curt TriFlex Brake Controller # C24VV with Adapter # C51515. The Curt Brake Controller features an integrated safeguard protection with digital communication display. I am currently not aware of a factory harness under the drivers side kick panel for trailer wiring on your vehicle. The controller will have to be hardwired in order to communicate with the 7-way adapter. To convert the 4-pin connector to a...
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  • Is Blinking Display for Curt TriFlex Brake Controller Ok When Brake Pedal is Pressed and No Trailer
    What you are seeing is normal for the Curt TriFlex Trailer Brake Controller # C24VV. If you check out attached cutout from the linked instructions you can see that Curt calls this out specifically in the installation instructions.
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    Image 1 for
  • Troubleshooting Trailer Brakes That are not Functioning Properly
    This sounds like it could be one or two things. A short could definitely be causing the issue, but it may also be a ground problem as well. To start, reconnect the blue wire to the brake controller. This will take two people but using something like the Circuit Tester # PTW2993 you will need someone to run the manual override on the TriFlex # C24VV while checking the output on the 5 o'clock position on your 7 Way. This should be putting out 12 volts, or very close to it. When the manual...
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  • Compatibility of Curt C24VV TriFlex Brake Controller w/ Electric Over Hydraulic Braking Systems
    It sure will, the Curt # C24VV TriFlex Brake Controller is indeed compatible with electric over hydraulic brake actuators. You will also need the # C51453 brake controller wiring harness. I'll link you to the instructions for the # C51453 wiring harness that shows the location of the plugs under the dash of your Ram.
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  • Does Curt Brake Controller Install Harness # C51322 Fit 2000 Ford F-53
    Yes, for your 2000 Ford F-53 RV chassis the Curt brake controller install harness part # C51322 is a confirmed fit and would work well. It would work really well with the Triflex part # C24VV.
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  • Recommended Brake Controller Wiring Connector for 2018 Nissan Frontier
    For your 2018 Nissan Frontier, I recommend the Redarc Tow-Pro Elite Trailer Brake Controller # RED44FR. This gives you a clean look and removes the old knee knocker without losing any quality in your trailer braking ability. I recommend using the Tekonsha Wiring Adapter for Electric Brake Controllers # 3050-S. If you want the Curt TriFlex Trailer Brake Controller # C24VV you asked from, then you would use the Curt Custom Wiring Adapter for Trailer Brake Controllers # C51382. Either...
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  • How To Use Curt TriFlex Trailer Brake Controller On a 2018 Ram 1500
    The Curt TriFlex Trailer Brake Controller part # C24VV is an excellent option for a 2018 Ram 1500. That said, you'd also need the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51458 for plug-in-play installation. In regards to the factory brake controller, these aftermarket options are much more reliable and offer better performance. There is really no comparison and many swap out the factory brake controller for an aftermarket brake controller.
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  • Can Curt TriFlex be Used With 2019 Toyota Highlander
    So long as your 2019 Toyota Highlander does not have the factory tow package, you can use the Curt TriFlex Trailer Brake Controller # C24VV you referenced. To use it you will need the Wiring Adapter # C51515, T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118449 and Universal Installation Kit for Trailer Brake Controller # ETBC7. If your '19 Highlander has the factory tow package I strongly recommend the Curt Echo Mobile Trailer Brake Controller # C51180 because it is...
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  • Brake Controller Recommendation for a 2012 Tiffin Allegro
    There isn't a plug-in adapter that would allow for a simple installation of a brake controller like the Curt Triflex Brake Controller part # C24VV in your 2012 Tiffin Allegro, but from the research I did there should be a bundle of wires under your dash that a brake controller would install to. For a Tekonsha brake controller the brake controller we recommend the most is the Prodigy P2 Brake Controller part # 90885. This is the best selling controller on the market because of how easy...
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  • Are the Curt TriFlex # C24VV and Curt Adapter # C51453 a Fit for a 2014 Ram 1500 4WD 5.7 Hemi
    You have exactly what you need for installing a brake controller in your 2014 Ram 1500. Brake controllers, like your Curt TriFlex # C24VV, aren't necessarily vehicle specific, but the plug-in wiring adapter harnesses are. The correct one for your 1500 is the Curt # C51453 that you referenced. This will plug into the port under your driver side dash and allow you to easily install and remove the controller when needed.
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  • Connection Shortage On Brake Controller Wiring
    The issue is most likely on the trailer instead of a brake controller like # C24VV for example. I know you said you adjusted the brakes but I recommend adjusting the brakes more. Take a look at our video on how we adjust trailer brake assemblies, fast-forward to the 4:35 mark of the video. Have you tested the brake magnets already? I have an article attached that goes into detail on how to test the brake magnets if you have not done so already. The wire running inside the axle is the...
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  • Which is Better Curt Brake Controllers or Prodigy Brake Controllers
    The Curt brake controllers aren't my favorite ones to recommend as they have a tendency to have reliability issues across basically all models from them. The brake controller I recommend is the Prodigy P3 part # 90195 because this brake controller senses the amount of braking your tow vehicle is applying and puts a proportional amount of braking on the trailer's brakes. It also has a display that uses full words instead of codes that would have to be deciphered. It's our best selling...
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  • Recommended Trailer Hitch, Wiring Harness, and Brake Controller for 2005 Mercury Grand Marquis
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  • 7-Pin Wiring Harness And Brake Controller For A 2024 Hyundai Santa Cruz
    Hello Evan, I can help clear this up. The Curt T-Connector # C68JR that you mentioned is for vehicles already equipped with the factory tow package. Meaning there will be an OEM brake controller plug already present under the dash and the brake controller would simply plug right in. So, if you do have the factory tow package, you can easily install the # C68JR wiring harness. Then for example, you can use a brake controller like the Curt TriFlex # C24VV, along with the Custom Wiring Adapter...
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  • Parts Needed to Tow a Trailer with a 2004 Lexus GX 470 with Tow Package
    In regards to a 2004 Lexus GX 470, the factory tow package comes with most of the needed components. The only things you'll need to add to add really is a brake controller (if trailer has brakes), ball mount/hitch ball, and transmission cooler (recommended for high elevation towing). I recommend the Curt TriFlex Trailer Brake Controller part # C24VV with Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51362 and then the etrailer Ball Mount Kit part # 989899. If you decide...
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  • Compatibility of Curt C24VV TriFlex and Installation on 2014 Toyota Tundra
    The Curt # C24VV TriFlex brake controller would be a great choice for your 2014 Tundra. The TriFlex is a proportional controller that automatically levels, is compatible with both electric and electric over hydraulic trailer braking systems and can handle trailers with up to 4 braking axles. The connector for the brake controller will be located to the left of the e-brake pedal up above the kick panel as shown in the linked video and the photo I provided. In rare occasions, it's located...
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    Image 1 for
  • Curt Tri-Flex Brake Controller Shows Voltage on Blue Wire When Plugged In on 2008 Nissan Frontier
    First, if your 2008 Nissan Frontier has the factory installed 7-Way trailer connector then make sure you are using the proper harness for the Curt brake controller, # C51382. On the end that plugs into the truck, make sure the wires are in the same positions as the ones in the picture I have included. If something is out of place it will need to be moved. If you hardwired in the brake controller then I suspect that there needs to be a more substantial ground and/or the red wire is not...
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  • Parts Needed to Install Curt Triflex Brake Controller in a 2002 Chevy Suburban
    All you need to install the Curt Brake Controller part # C24VV in your 2002 Chevy Suburban with the factory 7-way is the install harness part # C51342 that you referenced. This harness plugs into the port under your dash and it will be fully active and ready to go once you mount it.
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  • Low Voltage and Weak Brakes on Trailer
    In order to test the Curt TriFlex Trailer Brake Controller part # C24VV, you will want to first turn the gain up to the maximum settings which on this controller is signified by "L.9" and "9.9". Once you have done so you will then need to sever the blue brake output wire about 6" from the back of the controller. Apply the manual override and and test the wire with a multimeter like part # PT89ZR. You should be getting a full 12 volts or close to it once the above has been completed. If...
    view full answer...
    Image 1 for
  • Recommended EOH Trailer Brake Controller for a 2001 Dodge Ram
    The Curt TriFlex Trailer Brake Controller part # C24VV is an excellent option for a 2001 Dodge Ram and will work with trailers that have electric over hydraulic brakes. It also offers plug-in-play installation when used with the Curt Custom Wiring Adapter part # C51332. This will be a great option that will serve you well
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  • Connecting Brake Controller Output Circuit to 7-Way of 2008 Dodge Ram 1500
    If there is only 4 wires ran to the back of the 7-way you have installed on your 2006 Dodge Ram 1500 that would be why the brake controller circuit is not active on the 7-way. One of the wire you found near the 7-way is most likely the output circuit. You can use a circuit tester like the part # PTW2993 to test the circuits and if you find the correct one the brake controller will show a trailer connection on it's display. Or you could run a wire from the blue wire of the brake controller...
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Do you have a question about this Trailer Brake Controller?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video by:
Joshua S
Employee Dustin K
Video Edited:
Dustin K
Employee Wilson B
Updated by:
Wilson B
Employee Michael B
Installed by:
Michael B
Employee Ryan G
Test Fit:
Ryan G
Employee Amanda K
Written by:
Amanda K

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