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  1. Trailer Brake Controller
  2. CURT
  3. Electric
  4. Proportional Controller
  5. Up to 4 Axles
  6. Plug-In
Curt TriFlex NEXT Trailer Brake Controller w/ Plug-In Harness - 1 to 4 Axles - Proportional
CURT

Curt TriFlex NEXT Trailer Brake Controller w/ Plug-In Harness - 1 to 4 Axles - Proportional

Part Number: C67PQ
$135.95
Trailer Brake Controller

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In Use/Installed

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 w/ Plug-In Harness - 1 to 4 Axles - Proportional part number C67PQ can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (6)
  • Q & A (0)
  • Videos (3)
  • Photos

CURT Trailer Brake Controller - C67PQ

  • Electric
  • Proportional Controller
  • Up to 4 Axles
  • Plug-In
  • Under-Dash
  • CURT
  • 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 harness hardwires to your vehicle and plugs into unit


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
  • Warranty:
    • Limited lifetime on brake controller
    • Limited 1-year on wiring harness


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. The included pigtail harness splices into your vehicle's wiring beneath your dash to provide an easy-to-access plug for the brake controller.


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

51515 Curt Universal Quick Plug Brake Control Adaptor Harness with Pigtail

Installation Details C67PQ Installation instructions


California residents: click here


Video of Curt TriFlex NEXT Trailer Brake Controller w/ Plug-In Harness - 1 to 4 Axles - Proportional

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




Video Transcript for What to Know About the Curt TriFlex NEXT Trailer Brake Controller

Hi there, I'm Michael with etrailer.com. Today we're gonna take a quick look at this Curt Triflex Next Trailer Brake Controller. So if you have electric brakes or electric over hydraulic brakes, you're probably already aware that without a brake controller your trailer's brakes won't activate. So they're really not doing you any good. So you are gonna need to have a brake controller. Basically what a brake controller does is when you apply the brakes in your tow vehicle it's gonna send a signal through your brake switch to your brake controller.

The brake controller is then going to send an electrical signal out to your trailer's brakes so that they apply and help to slow down your trailer. There are several different kinds of brake controllers. There's different basic technologies and that sort of thing. Really your two main categories are you have a time delayed set up or you have a proportional setup. So with your time delay, essentially you set how much power you want applied to your brakes and then no matter if you're just tapping your brakes or really slamming on them in an emergency sort of situation, it's going to apply that same preset power each time.

So there are some downsides to that. It doesn't give you as much control. It can be a little aggressive sometimes when you don't need it to be. But then with your proportional setup it is going to apply your trailer's brakes with the same intensity as your tow vehicle's brakes. So if you're just lightly tapping on the brakes it's just going to lightly apply your trailer's brakes.

So proportional systems like this one are definitely my preference. I think they're a little bit more, give a little bit more finesse to your performance. There are some downsides to these. Typically, they are gonna be a little bit more expensive then your time delayed systems just because they do have more components to them. They've got an accelerometer in there that's going to sense the inertia of your movement so that it can apply the brakes proportionally for you.

And then another downside is typically because it does have that inertia sensor in there, or an accelerometer, it's going to have to be mounted in certain configurations to follow your direction of travel. And that's one benefit to this particular model is that it doesn't have to be mounted in any particular configuration. So you can basically mount it wherever you want. So definitely a benefit to this one over even other proportional systems. So for this model specifically, it does have the LED display that's going to show the amount of power output. You can adjust that with your rocker switches here. So very easy to access those. That's going to allow you to adjust between 10 different gain settings. So you can adjust the amount of braking power to suit your performance, the road conditions, the type of trailer you're towing, and the weight of your load. If you select a higher setting for a harder braking and a lower setting for more gradual braking, you do wanna make sure when you're getting that set up a good rule of thumb is to go just shy of where your trailer's brakes lock up. So test it out a few times. As you're going down the road you don't want your trailer's brakes to lock up. So get to that point and then come down just a little bit to get that fine tune where you need it to be. And then typically your gain is only gonna have to be readjusted when you're experiencing changing road conditions or if the weight of your trailer changes. So if you drop off your trailer load and you're needing to you probably need to adjust that gain there. It also gives you nine different load settings so that you can adjust how quickly the brakes will reach their maximum braking level. So if your vehicle takes too long to come to a stop, good idea to increase your setting by pressing the upper rocker switch. And then if it's stopping too abruptly you can decrease the settings as well. So you kind of fine tune it to your preference. We also have the pinch trigger manual override here. So that's within very easy reach, very simple to operate. What that's gonna do is allow you to apply your trailer's brakes without having to apply the brakes in your tow vehicle. So say for instance, if your trailer starts swaying you don't really need to slow down your whole setup you just need to apply the brakes in your trailer to kind of bring that back in line. So you can just push in on that trigger switch there and that will apply your brakes in your trailer without having to apply the brakes in your tow vehicle. This does have several different integrated safeguards to help protect your vehicle, the trailer, and the controller itself. It's going to run continuous diagnostic checks to alert you to any potential problems. It will help to minimize drain on your car battery by entering sleep mode. After about five minutes of inactivity it's gonna help keep your trailer's brakes from overheating by reducing power output when you're sitting for prolonged periods or prolonged stops. So if you're in traffic or something like that it's gonna help decrease the power so your brakes don't overheat. It's also going to defend the brake controller and trailer brake away system against any shorts and prevent positive and negative power reversal with its built-in polarity protection. This is gonna be very quick and easy to get installed. Again because you're not having to worry about the orientation, you can basically just get it mounted wherever it's gonna be most convenient for you to reach and access those controls. They've got this mounting bracket here. As you can see we'll just use the included hardware to get this mounted in place. And then basically our controller just slides onto that so it can be mounted flush with your dash. So very convenient to get that mounted. When you're considering where you can mount this, give you a few measurements here. You can see it is right about three we'll call it three and one eighth of an inch wide. Our length, we're right about four inches long. And our height approximately one inch overall. So keep that in mind and when you're deciding where you can get this mounted. Now as far as wiring goes, that's gonna completely depend on your setup. So there are some vehicles that already have a plug pre-installed from the factory that will allow you to just plug this right in there. If you don't have that on your vehicle, there are some kits available that will allow you to make that installation process pretty simple. But they are very vehicle specific. So I'd encourage you to use our vehicle fit guide here at etrailer.com. You'll select your year, make, and model of your vehicle. We'll let you know which products are confirmed to fit with your vehicle. So that's another route to go. If your vehicle isn't already pre-wired with a plug then I would recommend that. Otherwise, it is gonna take a little bit of doing to get this installed. If you don't already have a seven way plug at the back of your vehicle, I would highly recommend using our ETBC seven plug that's gonna provide wiring and everything to get you set up so that you've got that connection so that your trailer can connect to your vehicle. But overall, a really great option here. Like I said, I really like the proportional system. The way this is going to allow your trailer's brakes to be applied at the same intensity as your tow vehicle. I like that this model gives you that option to have more versatility and where you get it mounted. And so overall, I think this is gonna be a great way to go if you are needing a brake controller for your trailer's brakes. And that completes our look for today. Again, I'm Michael with etrailer.com. Thanks for watching.

Ratings & Reviews

4.7

1389 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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See what our Experts say about this CURT Trailer Brake Controller

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    Since you have a 4-way in your 2019 Toyota Highlander you can install a brake controller like the Curt TriFlex Trailer Brake Controller # C24VV with Wiring Adapter # C51515 so long as you use the Universal Installation Kit for Trailer Brake Controller # ETBC7. This has a 7-way to 4-way adapter but that alone isn't enough to install a break controller. This kit also includes the necessary circuit breakers, wire and additional hardware you will need to install a brake controller. I have...
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  • Does Curt TriFlex Plug Into 2007 Chevy TrailBlazer
    Even if your 2007 Chevy TrailBlazer has a factory 7-way there is not a plug underneath the dash for a trailer brake controller such as the Curt Spectrum # C51170; you will need to hardwire it with Wiring Adapter # C51515 though the wires will already be run if you have the factory 7-way (you should already have a factory 4-way). If you do not have the factory 7-way you will need to add the Universal Installation Kit for Trailer Brake Controllers # ETBC7. I've added a link on installation...
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  • How Does Brake Controller Install in 2011 Chevy Colorado
    Yes it is that simple! To wire in a brake controller to your 2011 Chevy Colorado only requires you to wire the four wires of the controller to the 4 wires that are present under the dash of your truck. I attached an install video that shows this process on a similar 2015 Colorado.
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  • Wiring Harness Needed to Install a Curt Spectrum in a 2025 Subaru Outback
    Hey Joseph congrats on the new car! To install the Curt Spectrum Brake Controller item # C51170 in your new 2025 Subaru Outback you'll need the Universal Wiring Adapter for Curt Trailer Brake Controllers item # C51515. There is no plug and play adapter. If you have any additional questions go ahead and add them to the comment box below and I'll be happy to help you.
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  • Recommended Plug and Play Brake Controller and Adapter for a 2015 Mercedes GL350
    Hey Lester. Does your 2015 Mercedes GL350 have the factory tow package? If so the Curt Discovery NEXT Trailer Brake Controller w/ Custom Harness item # C84GJ comes with everything you need to have a plug and play install. If you do not have the factory tow package you'll need the Curt Discovery NEXT Trailer Brake Controller -item # C84VV and the Universal Wiring Adapter for Curt Trailer Brake Controllers item # C51515. The brake controller harness will be located underneath the dash....
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  • Trailer Hitch and Wiring Recommendations for a 2022 Subaru Outback Wagon Wilderness
    The Curt # C67JR and Draw-Tite # DT73RR and # DT94YR trailer hitches do all fit your 2022 Subaru Outback Wagon Wilderness but I actually recommend going with our etrailer version part # e25TR because it has the hidden crosstube for increased ground clearance like the other options, but more importantly it has a matte black finish that is more subtle but more durable than the classic glossy black finish the other options have. For wiring we'll start with the T-One # 118467 for the basic...
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  • Constant Voltage on 12V and Brake Controller Output Wire with Curt TriFlex Trailer Brake Controller
    When testing the wire functions after installing the Curt TriFlex Trailer Brake Controller # C24VV and Wiring Harness # C51515 in your 2014 Toyota Sienna, it is normal for both the 12V and brake lights on a tester to light up without actually activating the brakes. This is because the brake controller sends out a small trace current to look for a completed circuit. I have attached a demonstration video on a similar 7 Way Trailer Connector Vehicle Tester # C73NR that shows this right around...
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  • What Trailer Wiring Do I Need on My 2021 Jeep Grand Cherokee (Without Factory Tow Package)?
    For setting up your 2021 Jeep Grand Cherokee (without factory tow package) for wiring, you will first need a 4-way harness. For a 4-way that is compatible with your vehicle, I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C62VR. The Curt connector will allow you to install a 7-way into your vehicle for the functions you need for towing if you need those functions. For a 7-way, once you have the 4-way installed, you need the Universal Installation...
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  • Troubleshooting Lights On Curt Spectrum Trailer Brake Controller Staying On After Braking
    It sounds like there may be an issue with the brake switch on your 2021 Jeep Gladiator. With the Curt Spectrum Trailer Brake Controller # C51170 staying on after you have released the brake pedal it is still receiving power through the red wire of the Universal Wiring Adapter # C51515. You can use a Test Light # PTW2993 to determine if power is still in the red wire with the brake pedal released. You will also want to visually check to ensure that there is nothing in the way that is causing...
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  • Redarc Tow-Pro Elite vs. Curt Spectrum Brake Controller for 2019 Audi Q5
    On the surface, there is a lot of similarities between the Curt Spectrum Trailer Brake Controller # C51170 and the Redarc Tow-Pro Elite Trailer Brake Controller # RED44FR, but the Redarc is truly the superior option in every way for your 2019 Audi Q5. Since you don't have trailer wiring in your Audi you will need to add ZCI Vehicle Wiring Harness # 119250KIT and Universal Installation Kit for Trailer Brake Controller # ETBC7, though the Spectrum also needs the Wiring Adapter for Curt Trailer...
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  • Brake Controller Wiring Location on 2008 GMC Canyon with Factory 7-Way
    The brake controller wiring on your 2008 GMC Canyon is actually hiding under your dash. It will be to the left of the steering column and above the brake pedal. This can sometimes be difficult to find, but, you'll know it because it will be held together by a white tag. If you take a look at the linked install video of a brake controller being installed on a similar model year Canyon you can see where you need to look. You will then be able to wire in a brake controller on your 2008 GMC...
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  • Brake Controller For 2023 Ford Transit T250 With Tow Package
    There is no plug-in brake controller or plug and play wiring for your 2023 Ford Transit T250, it just does not exist, unfortunately (I verified this with our manufacturers). If you wanted an in-cab brake controller you would need to get the splice-in version like with the Curt Spectrum Trailer Brake Controller # C51170 and Wiring Adapter # C51515. Or, since you have the 7-way already, if you didn't want to do any wiring at all you could use a wireless brake controller, making things very...
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  • Installing Brake Controller On Cold Side Of Brake Switch
    Your Curt Venturer Trailer Brake Controller # C74VV and Universal wiring adapter for Curt controllers # C51515 are a confirmed fit for your 2011 GMC Terrain. This wiring adapter does not directly mount into the dash because this vehicle did not have a tow package available. You will need to tap into the cold side of the brake switch near your brake pedal and you will need to attach a ground as well as a power wire. The blue wire will go from your controller to another length of wire...
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  • Comparing Curt TriFlex Trailer Brake Controller To Curt Discovery Trailer Brake Controller.
    The main difference is the Curt TriFlex Trailer Brake Controller # C24VV is a proportional brake controller while the Curt Discovery Trailer Brake Controller # C84VV is a time delay controller. The proportional controller will automatically adjust power sent to your trailer brakes based on how hard you are braking, while the time delay always sends the same force no matter how soft or hard you are braking. Those with time delay controllers will often have to reach down to crank up the...
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  • How To Add Trailer Brake Product To 2025 Ford Ranger With Factory Tow Hitch And 4 Way 7 Way
    Hey Roy, thanks a lot for all the info, it helps find what you need! You are looking for a brake controller, and since you already have the 7 way for brakes, it makes it easy for you. If you want a simple, easy to use brake controller, I'd grab the Curt TriFlex NEXT Trailer Brake Controller w/ Plug-In Harness - 1 to 4 Axles - Proportional # C67PQ. It comes with a custom fit harness that plugs into your brake controller port under the dash. No wiring or splicing needed! There's also an...
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Info for this part was:

Employee Katherine B
Edited by:
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