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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,C51332

Retail:$196.65
Our Price: $138.86
You Save: $57.79
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: C51332

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.



51332 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 - C51332

Average Customer Rating:  4.7 out of 5 stars   (160 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: Thomas08/09/2023

It does not fit my vehicle. On the attached photo the connector on the left is the stock dodge plug, the plug on the right is what I just got

Etrailer Expert

Brooke M.

8/23/2023

Hmm...youll be looking for another white plug like the white harness. Do you know if your truck for sure has the factory tow package?



by: Loren 05/14/2024

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



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: Kory K03/18/2014
2008 Dodge Ram Pickup

Sorry for the late follow-up. I just wanted to let you know that the brake
controller and wiring harness I purchased through eTrailer worked very well
with my 2008 Dodge Ram 2500 with the Cummins 6.7L diesel. Pictures are
attached for your use, as required.

The trailer was an 18-foot enclosed snow machine tailer with a steel
chassis. I can't remember the empty weight, but it's substantial. We towed
empty and full on dry and snow covered roads from Oklahoma to Colorado and
back. Even with th exhaust brake on my truck, I can't imagine towing this
load through the hills and mountains without a brake controller. It's been
done before, but I would say it's an unnecessary risk given the more than
reasonable prices at eTrailer...it was cheap insurance pulling such a heavy
rig with my family on board.

The controller was definitely not your top-of-the-line model, but the
adjustability and controls were more than adequate for somebody who tows
occasionally. A professional may desire more proportional controls and
adjustability, but not much more. This unit peformed flawlessly.

Thank you for your time. Please feel free to contct me if you would like
any clarification on my statements or pictures.



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: Robert J. 07/15/2018
2007 Dodge Ram Pickup

This item easily plugged into my Curt brake controller and into my truck’s factory plug. Made for a less than 5 minute install; powering up the brake controller with no issues. Convenient is an understatement with this pigtail. Rig is 2007 Dodge Ram 2500 4X4 CTD.



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: Steve T.06/18/2016
1999 Dodge Ram Pickup

Perfect fit for my 1999 Dodge Ram. it made installation of the brake controller super easy. I highly recommend paying the extra $** for this item.



by: Tim 09/02/2022

The folks at etrailer are the best! Very helpful and knowledgeable!! The product I received fit perfectly and works great!!

Tim

9/3/2023

Still working great!



by: Henry 03/15/2024

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



by: Jim 02/09/2024
2004 Dodge Ram Pickup

y0u want good go to etrailer was a perfect fit



by: Dan 03/29/2024

Never a problem with etrailer



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: 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: David H07/31/2017

I ordered a fifth wheel brackets and hitch along with curt brake controller and pigtail. Everything fit great with no problems and the service and shipping was very speedy. Highly recommend etrailer for all your needs.



by: Chris 04/05/2024

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



by: Tim 10/13/2023

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



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: Micah07/18/2022
Dodge Ram Pickup

2006 Dodge Ram. Easy install. Plug it in and tie up the wires. I put a wire protector sleeve to cover the wires coming out of the controller.



by: John 03/13/2024

Great fit works as described


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


  • 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...

  • Digital Display Of Curt Triflex Shows Two Dashes
  • The Curt Triflex Trailer Brake Controller part # C24VV shows two dashes when it is not getting the 12V power that it needs. You want to check that the black wire is properly connected to the positive side of the vehicle's battery and the ground on the negative side. I have attached a diagram for you to test the connections of the Triflex.
    view full answer...

  • Wiring Adapter For TriFlex NEXT Brake Controller on 2014 Toyota Tundra With Factory 7-Way
  • The correct wiring adapter to go with the Curt TriFlex NEXT Brake Controller # C24VV for your 2014 Toyota Tundra with factory 7-way is part # C51362.
    view full answer...

  • Installing the Curt TriFlex Trailer Brake Controller on a 2017 Chevrolet Colorado
  • I am having a hard time trying to understand your problem so bear with me here but it sounds like you are trying to install the Curt TriFlex Trailer Brake Controller part # C24VV on your 2017 Chevrolet Colorado with the Universal Wiring Adapter part # C51515. If that is the case then you are off to a great start as this is the correct harness for your Colorado. If your Colorado came with a factory 7-way then the wires you need to attach the harness to are already ran underneath the dash
    view full answer...

  • Should Numbers Flash on Curt TriFlex Trailer Brake Controller without Trailer Connected
  • I checked out the owner's manual of the Curt TriFlex Trailer Brake Controller part # C24VV for you and on the fifth page it states, "If a trailer is not connected the output setting is flashed when the brake pedal is pressed or the manual control is actuated.". Therefore, the scenario you described is normal according to the manual. I suggest giving this a read to better understand how your controller works. I have attached it below.
    view full answer...

  • What Does Sensitivity/Boost Setting of Curt TriFlex Brake Controller Refer To
  • The Curt Triflex Brake Controller part # C24VV that you referenced has 9 different sensitivity settings so that you can adjust how aggressive you want the inertia sensor to react to deceleration. Since not all trailer brakes are as sensitive as others this allows you to tailor the braking to the trailer. So basically the higher the sensitivity the harder the brakes will apply with the same level of deceleration. This is also known as the "boost" setting as well.
    view full answer...

  • Install Harness for Curt Triflex in 2018 Dodge Durango
  • The Curt Triflex part # C24VV does not come with a custom fit harness for your 2018 Dodge Durango so you'd need to order that separately with part # C51446 and you'd be set.
    view full answer...

  • Brake Controller Displays L Error Code After Vehicles Alternator Is Replaced
  • My initial suspicion is that when the vehicle's electrical system powered back up after the alternator was replaced, a voltage spike hit the brake controller, causing the display you mentioned. My contact in the Tech Services department at Curt has confirmed this. According to Curt, if you unplug the controller for a few minutes then plug it back it, in most cases the brake controller will once again function normally. In rare instances, this can cause a internal short circuit in the controller,
    view full answer...

  • Trailer Brakes Lock Up After Installing Curt TriFlex Brake Controller
  • If your trailer brakes are locking up with the Curt Tri-Flex Trailer Brake Controller # C24VV, I have to start with checking to ensure you have adjusted the brake setting on the controller to something other than the highest settings, which can result in aggressive braking. Otherwise, the issue with brakes locking up with a brake controller is that there may be an incorrect connection in your wiring. The issue is most likely that your brakes are connected to the 12 volt power on your
    view full answer...

  • Troubleshooting Flashing L.5 Error Code on Curt Triflex Brake Controller
  • The L. display should show up on the Curt TriFlex brake controller, # C24VV, when it is plugged in. The lever or button on the left side of the controller is the sensitivity adjustment. The L. should change when that lever is moved. You can also try resetting the controller by unplugging it for a few minutes and then plugging it back in (without the trailer connected). We've found that Curt controllers periodically will have odd error codes like this and resetting them takes care of
    view full answer...

  • Troubleshooting Brake Controller that Shows Connection When No Trailer is Connected
  • Most likely what happened is that over the winter your trailer wiring connector at the rear of your vehicle developed some corrosion which is now confusing the brake controller pin on your 7-way into thinking a trailer is connected. This is very common and all you have to do is clean the pins of the controller and it should start working again.
    view full answer...

  • Cannot Adjust Power on Curt TriFlex C24VV Trailer Brake Controller
  • I've checked with my contact in the Tech Support department at Curt regarding your issue. The problem you're experiencing is caused by a short in the brake output circuit somewhere in the trailer wiring. Begin at the trailer connector and trace the output circuit (usually a blue wire) rearward from the connector to the trailer brakes. Look for loose connections, pinched wires or wires with cracked or worn insulation. Repair the damaged section of wire using # 10-1-1 10 gauge brake wire
    view full answer...

  • Will the Curt TriFlex Trailer Brake Controller Fit a 2018 Chevrolet Colorado
  • Yes, the Curt TriFlex Trailer Brake Controller part # C24VV will fit a 2018 Chevrolet Colorado when used with the Universal Wiring Adapter for Curt Trailer Brake Controllers part # C51515. Please note, if your truck came with the factory 7-way then all the wires you need to use are already run under the dash.
    view full answer...

  • Brake Controller Recommendation for a 2003 Ford Ranger
  • Does your 2003 Ford Ranger already have a 7-Way trailer connector? If not then to install a brake controller you will need to also install # ETBC7. If you do already have a 7-Way connector you will just need # 5506. For a brake controller I recommend the Brake EVN # TK63VR. This is a "nothing fancy" proportional brake controller that will be great for your application. Proportional controllers like this will apply the trailer brakes in proportion to how much the tow vehicle is braking. I
    view full answer...

  • How to Install the Curt TriFlex Trailer Brake Controller Part # C24VV on a 2016 Ram 1500
  • The Curt TriFlex Trailer Brake Controller part # C24VV coupled with the Curt Custom Wiring Adapter part # C51458 will have everything you need to install a brake controller on your 2016 Ram 1500. You will not need to take the vehicle to the dealer to install this as the process is very simple and should not take you more than 30 minutes or so. The hardest part of the whole process is finding the brake controller plug-in port on the vehicle. If you take a look at the attached installation
    view full answer...

  • Parts Needed to Install Curt TriFlex Brake Controller in GMC Van and Ford F-53
  • To install the Curt TriFlex # C24VV trailer brake controller in your 2006 GMC Savana Van you will need to wire in harness part # C51515. Vehicles with the 7-way tow package have the blue output brake wire already run from the back to the front. It is located under the dash near the emergency brake pedal. This connects to the blue wire on the harness. The white wire connects to battery negative, the red wire connects to the cold side of the brake light switch and the black wire connects
    view full answer...

  • Can the Top of the Fuse Box/Power Distribution Box Be Opened Safely on a 2014 GMC Yukon
  • You have to be careful with the fuse box or power distribution box on your 2014 GMC Yukon because if you lift that handle (or the whole box) more than 3/8 of an inch it will become disconnected from the vehicle and you will have to have it towed to a GMC dealer to get the vehicle working again! You can take the top cover off though to access the fuses and relays without any issue. You just want to avoid pulling the whole box up. I have included a link to our help article on installing
    view full answer...

  • Curt Triflex Brake Controller Displaying d.C. Error Code when Trailer Connected
  • When the display flashes a d.C. code, it means no trailer is connected (or at least that's what it's detecting). This could be either because the trailer connection has become unplugged, there is a bad pin, a bad wire or the trailer brake magnets are malfunctioning. To start, check trailer connector and make sure both the trailer and vehicle ends are free of corrosion or rust and no pins are loose or missing. Also check for any crimped, frayed or pinched wires and repair as needed. I
    view full answer...

  • Troubleshooting Error Code A.E. on Curt TriFlex Trailer Brake Controller C24VV
  • The operating instructions for the Curt Triflex brake controller # C24VV, which are linked for you, indicate on page 19 that if the unit displays the error code A.E. this indicates an internal fault with the controller's accelerometer. This is not a serviceable problem and the unit should be replaced or referred to Curt for warranty service under the terms of the limited lifetime warranty. You may care to review the linked article on brake controllers.
    view full answer...

  • Where is Brake Controller Adapter Plug Located In 2002 Dodge Ram Pickup
  • The green connector in your truck is not the correct plug. It is normally a blue plug like what I have shown in the photo that plugs into the adapter part # C51332 if you are using a Curt brake controller like part # C51170. There will be a port to plug into if the truck came with a factory 7-way plug just to the right of the emergency brake. If the 7-way plug was installed after-market, you will need to see how far the wires from the plug are extended so you can complete the install
    view full answer...

  • Curt Spectrum Brake Controller Showing no Trailer on 2000 Dodge Ram 2500 After Replacing Connectors
  • Yes, you are definitely on the right track. If your Curt Spectrum Trailer Brake Controller # C51170 is still not showing a trailer is connected and you have already replaced the connectors, I think it has to be a short either on the brake wiring or the brake magnets themselves. Before replacing your brake assemblies entirely, start by just checking the wires to the brake magnets (if you have not done so yet) and look for wires that may be pinched or otherwise damaged and fix as necessary.
    view full answer...

  • Installation of Brake Controller on 1997 Ram 1500 Club Cab with Factory Trailer Plug
  • We do appreciate your continued patronage and I think we can assist you with this. If you can't find the plug and the dealer doesn't offer any help on this, then you can hard wire in the controller to your 1997 Ram 1500, so you will be able to install the controller it'll just be a bit more time consuming. You will need a circuit tester like the # PTW2993 to test wiring functions under the dash, and you may need some butt connectors like the # DW05745-5 to complete your wiring connections.
    view full answer...

  • Quality Trailer Brake Control for a 2006 Dodge Durango
  • You are thinking of Tekonsha brake controllers. They are pretty much the leader in the brake controller industry. The Curt controllers would not be my first choice. I prefer Tekonsha controllers because they have a long proven track record of quality and performance. The Curt controllers are a less expensive option but they are new to the brake controller industry. They did have some performance issues initially but they are improving. I recommend the Tekonsha P2, # 90885. This is a
    view full answer...

  • Curt Brake Controller Recommendation for 2005 Dodge Ram 2500
  • The price for the Venturer controller part # C74VV and install harness part # C51332 is tough to beat but a proportional brake controller will be a much better option. Proportional controllers sense how hard you are applying the brakes and apply the trailer brakes the same way. Time-delayed like the Venturer put out a preset amount of braking power so they aren't as effective. So instead the Triflex part # C24VV with the install harness # C51332 would be the better option for your 2005
    view full answer...

Info for these parts were:

Employee Jameson C
Expert Research:
Jameson C
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Clayton O
Test Fit:
Clayton O

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