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

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

Part Number: C24VV
In Stock
$135.95
Retail:$178.95
You Save: $43.00
Trailer Brake Controller
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This compact brake controller fits nicely in your cab. It's designed to mount flush to the dash and is only 1" thick. The controls are simple, the LED display is large and bright, and the manual override is easy to reach in a pinch. 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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CURT Trailer Brake Controller - C24VV

  • Electric
  • Proportional Controller
  • Up to 4 Axles
  • CURT
  • Under-Dash
  • Plug-In
  • Under-Dash Box
  • Single Trailer Only
  • LCD Display

This compact brake controller fits nicely in your cab. It's designed to mount flush to the dash and is only 1" thick. The controls are simple, the LED display is large and bright, and the manual override is easy to reach in a pinch.


Features:

  • Activates trailer brakes in proportion to your vehicle's braking
    • Automatically adjusts trailer's braking based on deceleration of tow vehicle
    • Automatically increases power when going downhill and decreases when going uphill
  • Shows you braking and sensitivity settings and error codes on a simple LED display
  • Uses rocker switches to set settings
  • Activates manual override with pinch-trigger
  • Protects your vehicle, trailer, and controller
    • Runs continuous diagnostic checks
    • Minimizes drain on car battery with sleep mode
    • Keeps trailer brakes from overheating by reducing power output during prolonged stops
    • Defends brake controller and trailer breakaway systems against shorts
    • Prevents positive and negative power reversal with built-in polarity protection
  • Mounts at any angle
    • Automatic leveling
    • Mounting bracket and hardware included
    • Plug-in, vehicle-specific brake control adapter (sold separately) available for certain vehicles


Specs:

  • Application: trailers with up to 4 axles (8 brake assemblies)
    • Compatible with electric trailer brakes
    • Compatible with ABS brakes, cruise control, low-voltage wiring, multiplex wiring, and PWM systems
  • Dimensions: 4" long x 3-1/8" wide x 1" tall
  • Limited lifetime warranty


Gain and Load Adjustment

Curt TriFlex NEXT

Gain is the maximum amount of power that will be applied to your trailer's brakes. 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. Use the gray rocker switch to adjust the gain on a scale of 0.5 to 9.9 in increments of 0.5.


Once you have the gain set, you can fine-tune your braking by adjusting the load control on a scale of 1 to 9 using the black rocker switch. This controls the aggressiveness of your trailer's braking, meaning how quickly the brakes reach the maximum braking level. If your vehicle takes too long to come to a stop, increase the setting. If it stops too abruptly, decrease the setting.


LED Display

The LED display on the TriFlex is large and easy to read at a glance. You can adjust the brightness or trigger night mode so it won't glare obnoxiously on your dash. It also will give you error messages you can use to troubleshoot.


Curt Discovery NEXT troubleshoot

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.


Installation

Automatic leveling means 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


If you don't already have a 7-way plug at the back of your vehicle, take a look at our exclusive 7- and 4-way brake control installation kit (ETBC7 - sold separately).


What is Proportional Braking?

What is proportional Braking

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


California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.7

923 reviews
This compact brake controller fits nicely in your cab. It's designed to mount flush to the dash and is only 1" thick. The controls are simple, the LED display is large and bright, and the manual override is easy to reach in a pinch.

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Show More Reviews

See what our Experts say about this CURT Trailer Brake Controller

  • 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 U-shaped...
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  • Hitch, Weight Distribution and Brake Controller Recommendations for a 2017 Toyota Sienna XLE
    We can get you everything you need for towing with your 2017 Toyota Sienna XLE. By plastic shield, I believe you are referring to the appearance panel underneath the Sienna, and that will have to trimmed a bit in each of the hitches available for the vehicle. A great Class III hitch would be the Curt # C13105, which is rated for weight distribution and has been given a nearly 5-star review on our site by the over 500 customers that have rated it. As for a brake controller, the wireless...
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  • Troubleshooting Curt Triflex Brake Controller Showing OL Code on Display
    The Curt Triflex brake controller is known to have more problems than other brake controllers so I would not rule out the problem being the controller. Testing the brake controller is fairly easy. Sever the blue brake output wire near the brake controller leaving enough room to reconnect it and then apply the manual slide. Using a circuit tester like the Quickee Tester, part # PTW2993, you should get output to the controller side of the wire you severed. If the manual slide activates...
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  • Brake Controller Installation on my 2017 Audi Q7
    With the Curt Triflex part # C24VV and the Curt Adapter part # C51522 you will have all you need to successfully install your controller. I have linked a video for you showing the operation of the controller. Check it out to familiarize yourself with it.
    view full answer...
  • Troubleshooting Curt TriFlex Brake Controller Not Showing Activation
    On your Curt TriFlex Trailer Brake Controller # C24VV, the decimal point as you put it is standby mode with no trailer connected. The blank screen is also standby mode and that screen is what is seen when simply starting the vehicle, but that screen should illuminate when you press the manual override or show the decimal point when you hit the brake pedal only while moving since it is a proportional controller. If it does not operate under those criteria, then you will need to have the...
    view full answer...
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  • Recommended Weight Distribution System for a Keystone Springdale Mini RV
    Hey Jacobus glad you asked your question and congrats on the new RV! You are going to be way overrated if you use a 1,500 lbs or 1,000 lbs tongue weight rated weight distribution system. Bigger in this situation is definitely not going to be better. If you run that high of a capacity system you'll have an extremely ridged and uncomfortable ride. Plus there's potential to damage your trailer's frame. For your Keystone Springdale Mini RV, I recommend the Equal-i-zer Weight Distribution...
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  • Troubleshooting Curt Triflex Brake Controller that Stopped Working with Brakes
    First thing to check is to see if your truck's third brake light is still working when you hit the brakes. When the fuse for that circuit goes on GM trucks like your 2014 model it will prevent the brake controller from activating when the brakes are applied. Next check to see if there's voltage on the red wire of the brake controller when the brakes are applied. If so, and the controller still won't activate with the pedal it has an internal problem and would need to be replaced. Curt...
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  • Troubleshooting Curt Brake Controller that Rests When Brakes are Released
    So the controller resets every time you apply and release the brakes? You might check to make sure you made all the connections correctly when you wired it to the correct functions. Most likely it sounds like there's an issue with the red and black wires of the controller. The black wire of the controller needs to run to a power source that is hot all the time and the red wire needs to run to the stoplight circuit. Now all of that said the TriFlex is known to be prone to internal problems...
    view full answer...
  • Troubleshooting Brake Controller with OL Code when Brakes are Applied
    If you check out the attached instructions for the Curt TriFlex Trailer Brake Controller # C24VV you can see that the OL code you are getting means that there is an "Overloaded output circuit, trailer brake system fault". Whichever controller you have the problem and solution is the same. You have a short on your brake signal circuit from your brake controller to your trailer brakes which is causing too much power draw. Check both the tow vehicle and trailer connectors and make sure...
    view full answer...
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  • Will Curt Triflex Brake Controller Cause Battery Drain
    Hey Christa, so the Curt Triflex part # C24VV shouldn't be draining your battery since it should be going into a sleep mode when not in use. To cut power to it you would need to unplug it at the rear of the controller. There isn't a master power switch for it as that would cause it to lose settings.
    view full answer...
  • Location of Brake Controller Connector on a 2014 Toyota Tundra
    I believe that the photo you sent in is of the OBD-II port on your 2014 Toyota Tundra. This is useful if your vehicle is throwing codes but it is not used for the brake controller. As long as your Tundra has the factory 7-Way at the rear of the truck then the Wiring Adapter # C51362 is the correct part for you to install the Curt TriFlex Trailer Brake Controller # C51140. Try looking to your left behind the side kick panel next to your emergency brake pedal. I have attached both a photo...
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  • Troubleshooting "Short" Error Message On Curt TriFlex NEXT C24VV
    Hello Kevin, thanks for reaching out. It sounds like you have already done the most helpful troubleshooting step by hooking up another controller and verifying that everything works fine. This eliminates the trailer wiring as a potential cause of the issue and it also eliminates the truck as a culprit as well. That really leaves us with the controller as the cause of the issue, more specifically an internal short. You can try cutting the blue wire coming from the controller at least 6"...
    view full answer...
  • Does Curt TriFlex NEXT Brake Controller Have to be Calibrated When Vehicle Is Turned Off
    Nope, the Curt TriFlex NEXT # C24VV will not have to set up and be recalibrated when the vehicle is turned off, it will keep the settings you use.
    view full answer...
  • Will Curt TriFlex NEXT Controller and Wiring Adapter Fit a 2022 Genesis GV70?
    Hey Anthony, thanks for reaching out! The Curt TriFlex NEXT Trailer Brake Controller #C24VV and Curt Adapter # C77BR will fit your 2022 Genesis GV70 just fine. The only way a Tekonsha adapter will work is if you cut off the connector for the controller side and splice it into the wiring for the brake controller. So, while the adapter might cost a little less, it kind of defeats the purpose of the plug-in adapter anyways so it would be better just to use the Curt adapter. Do you already...
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  • Is Blue Wire of Trailer Wiring Normally the Brake Output Circuit
    Hay Gaspar, the blue wire running to the brake output circuit is normal so in that regard it's standard. But the other colors you mentioned do not appear to be standard so I would run the wires by the correct function to the wiring of your trailer instead.
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  • 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.
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  • Curt C24VV TriFlex Brake Controller Putting Out Minimal Voltage With Vehicle Brake Pedal Applied
    The Curt # C24VV Triflex is a proportional brake controller, which means that there are internal sensors that can determine how quickly the tow vehicle is stopping, at which time the controller will send the appropriate amount of voltage to the trailer brakes so the vehicle and the trailer will brake at the same rate. When the vehicle is NOT moving, you'll get very little voltage out of the controller with the vehicle brake pedal, just enough so the controller 'knows' there's a trailer...
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  • How to Install the Curt Triflex Brake Controller in a 2019 Toyota Highlander
    Hey Greg! We hear that quite often about U-Haul. The Hopkins 47185 is almost identical to our item # HM47180, so if they installed it correctly you should have a blue wire ran into your 2019 Toyota Highlander's cab. If not you'll need to use item # 12-2-1 because it's what sends the signal from the brake controller to your 7-way connector. If they just dead-ended the wire at the 7-way, I would go back and complain personally. There is no brake controller adapter in the 2019 Toyota Highlander,...
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  • Parts Needed to Install a Trailer Brake Controller on a 2009 Audi Q7
    If your 2009 Audi Q7 does not have a factory trailer connector at the rear of the vehicle then you will need to install both the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit part # 119250KIT and the Universal Installation Kit for Trailer Brake Controller part # ETBC7 in order for a brake controller to work. Trailer brake controllers are universal and can be adapted to fit any vehicle with the correct wiring harness. The correct wiring...
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  • Parts Needed To Install Tekonsha Prodigy P3 In 2006 Ford F-450 Cab and Chassis
    To install the Tekonsha Prodigy P3 # 90195 you were looking at in your 2006 Ford F-450 Cab and Chassis you will need the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers # 3065-P which will plug into the factory trailer brake controller port underneath the dash of your truck, and will not require any splicing to install. Once the adapter is plugged in, all you will need to do is mount the controller and you are ready to get on the road! I included videos for both of the...
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  • How Can I Be Sure My Curt Triflex Brake Controller Is Working Worrectly
    Hello Dan, I can definitely help with this. It is completely normal for the Curt TriFlex brake Controller # C24VV to show the current gain setting when the brakes are applied, or when the manual override is pressed. It sounds like you have the gain currently set at 9.7 which is why you are seeing this number flash on the display. So, it sounds like it is working correctly and there is no problem with the controller. I suggest trying to turn the gain down. This way you can be 100% sure...
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  • Brake Controller with Plug-In Adapter for 2020 Ram 1500 With Tow Package
    There are absolutely plug-in wiring adapters for a brake controller for your 2020 Ram 1500, and what you can use is the Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In # C51458 Then for a brake controller that doesn't take up a lot of space use the Curt TriFlex NEXT Trailer Brake Controller # C24VV.
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  • How to Reset Curt Triflex Brake Controller
    Try unplugging the brake controller for 10 seconds or so and then replugging it in. Sometimes brake controllers like the part # C24VV just need to be reset and this is the corret way to do that.
    view full answer...
  • Troubleshooting Curt TriFlex Brake Controller
    If your Curt TriFlex Trailer Brake Controller # C24VV is just showing R then most likely you will need to recalibrate the controller. To do this, you can unplug and then plug back in the connector on your trailer. You will know it's recalibrated if ".." appears on the screen.
    view full answer...
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Used Picture for Curt TriFlex NEXT Trailer Brake Controller - 1 to 4 Axles - Proportional

Condition: Like New

Notes: May have damaged packaging or minor cosmetic blemishes.

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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 Ethan H
Video by:
Ethan H
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 Trevor W
Test Fit:
Trevor W
Employee Amanda K
Written by:
Amanda K

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