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Curt Discovery NEXT Trailer Brake Controller - 1 to 4 Axles - Time Delayed
Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In

Part Numbers: C84VV,C51438

Retail:$131.95
Our Price: $113.89
You Save: $18.06
Trailer Brake Controller
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Curt Discovery NEXT Trailer Brake Controller - 1 to 4 Axles - Time Delayed
part number: C84VV

An easy-to-read digital number display, 10 power levels, and a pinch-trigger manual override make this time-delayed brake controller easy to use. Installation is simple with no mounting restrictions. Activates brakes with a preset intensity.

Features:

  • Brake controller activates trailer brakes with preset intensity
  • Adjustable power output control lets you select the amount of braking force
    • Rocker switches located on left front of module for easy access
  • 10 Gain settings and 9 load settings allow you to adapt to various driving conditions
    • Select a higher setting for harder braking and lower for more gradual braking
  • Pinch-trigger manual override is within easy reach for controlling trailer sway or stopping in emergencies
  • Simple LED display shows the amount of power output
    • Self-diagnostics monitor trailer connection and check for shorts
  • LCD display shows power adjustments in 0.5 increments
    • Brightness is adjustable for optimal visibility
  • Auto-sleep mode prevents battery drain after 5 minutes of idle time
  • Quick and easy installation with no mounting restrictions
    • No need to mount level - install anywhere at any angle
    • Included mounting bracket and hardware designed to hold the brake controller flush against the dash
    • Plug-in, vehicle-specific brake control adapter (sold separately) available for select vehicles to reduce installation time


Specs:

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


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 orange 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 as a series of bars 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 black 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 Discovery 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.


LED Display

The LED display on the Discovery 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. Press the control button to cycle through the different modes.


Curt Discovery NEXT

Quick Installation

Because inertia plays no role in the functioning of this controller, you do not have to mount the unit at any particular 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.


Time-Delayed Braking

what is time-delayed braking

The Curt Discovery comes equipped with time-delayed braking. Every time you apply the brakes in your vehicle, a signal is sent - via the brake switch - to the Discovery. The controller then sends power out to your trailer brakes to activate them with an intensity set by you, at a rate determined by you. Both the amount of braking power (gain) and rate of application (load) can be adjusted to suit your preference, the road conditions, the type of trailer, and the weight of your load. To determine which levels are best for your application, test your towing setup and choose what feels right.



51126 Curt Discovery NEXT Time Delay Trailer Brake Control - 1 to 4 Axles

Replaces Curt 51120



Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In
part number: C51438

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.


Brake-Control Adapter Port

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.



51438 Curt Quick Plug Brake Control Adaptor Harness

California residents: click here




Customer Satisfaction Score:


Customer Reviews

Curt Discovery NEXT Trailer Brake Controller - 1 to 4 Axles - Time Delayed - C84VV

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In - C51438

Average Customer Rating:  4.8 out of 5 stars   (61 Customer Reviews)

An easy-to-read digital number display, 10 power levels, and a pinch-trigger manual override make this time-delayed brake controller easy to use. Installation is simple with no mounting restrictions. Activates brakes with a preset intensity. 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: John R05/24/2024

Took about 10 minutes to install. Have not made all the adjustments yet, but is easy to understand.



by: Jerry 04/25/2024

Tested . Work fine and advertised



by: Ethan 03/15/2024

excellent service and delivery.



by: Bruce09/23/2021

Ordered a Curt brake controller for my Toyota Tundra with the matching dual plug in. It installed easily, and worked perfectly. I later sold the Toyota and bought a 2010 Ram pickup. I transferred the Curt brake controller to my Ram pickup by ordering the matching dual plug in cord. It also installed easily, and works perfectly. Very pleased with everything. Excellent and prompt service, and helpful videos to help make installation effortless.



by: John07/12/2018
2010DodgeRam Pickup

You wouldn't think an adapter cable to mate a CURT brake controller to a 2010 RAM, factory installed trailer brake cable would be difficult. But another online retailer and 2 (TWO!) local RV dealers sold me the wrong one..each the same; but wrong!

Only etrailer got it right and at a fraction of the cost of the "others"! Works fine.



by: Dustin09/18/2013
2012 DodgeRam Pickup

I purchased this product with a Curt time delay brake controller. My 2010 Dodge Ram has the 7 way plug and towing package on it already which made the installation of the product super easy. I looked under the dash by the parking brake and there was the plug. I plugged it in and plugged in the controller, mounted it and I was done! Installation took me less than 12 minutes and that included me checking the plug with a multi meter to ensure the power was getting thru. The best part is I can remove the controller when I am not towing my RV so that I keep my stock appearance. If you can use this part on your truck pay the little extra and get it. The shipping was super fast and easy! One of the best experiences buying online!



by: GreenEdgeLawnCare05/04/2023

Its a plug…. Not much else to say! Fit my 2010 ram 2500 and Curt TriFlex controller perfectly.



by: Cliff H08/25/2016
2011 Ram 1500

Cable was perfect, dealer wanted 5 times the price, has worked flawlessly since I purchased it. etrailer.com was great with information I needed, and shipped item immediately, great job George, thanks again, will definitely only buy from etrailer.com in future.



by: Sidney 09/21/2023

Like its compact size and simple operat ion.



by: Dusten09/21/2023

Very helpful, knowledgeable and friendl y!



by: ERIC M.09/22/2014
2012 DodgeRam Pickup

BRAKE CONTROLER & HARNESS WORK GREAT & ARRIVED ON TIME THANKS FOR THE GREAT SERVICE



by: Brian06/04/2017

The break controller was just what we need it.



by: Jason M02/08/2017

Great product, only thing I wasn't sure about was if the gain flashed while a trailer was not hooked up. I emailed etrailer and in a timely manner for a response.



by: tom b09/11/2016

Piece of cake installation. Installed in 10 minutes. Your company should install a shroud over the wires coming from the brake controller to the adapter to hide the single wires.



by: Steve B06/03/2016

Received order in good time, and have installed in truck. All went well and works as described. Very happy with the price and the service. Will buy again from E-trailer again.



by: lj08/11/2015
2015 DodgeRam Pickup

I have 2015 ram 1500. Installation was simple. Might have taken 20 minutes. Setup and adjustment was simple just be sure and read directions. Much smoother braking than old controller.



by: Scott03/23/2017

Thanks Susan for helping me out. You found the correct part and install was a breeze. It took about ten minutes to hook up controller and connect harness. Thanks for working with me on the return issue. Looking forward to trying with my toy hauler.



by: James11/10/2017

This makes for a very installation. Instructions were very good. Brake controller installed and ready to use in 10 mins.



by: Charlie G10/08/2014

Great product! Simple installation! The staff was very helpful and order was filled and shipped promptly. Will order from etrailer.com again!



by: Jamie D.08/02/2015

This product is high quality and easy to use and install. Especially for the price. The shipping was extremely fast and the ability to track packet was even better. I would highly recommend using this company and buying this product.



by: Jimmy C08/17/2015

Plug worked great, delivery very quick, priced right. Couldn't ask for more. Took literally five minutes to install the controller with this cable. Nice!



by: Brooke06/18/2013

Great product, installed within minutes. Very quick delivery. Thanks for the outstanding service.



by: Richard C.04/14/2015

service was excellent,everything went so smoothly
.parts ordered fit perfect.I will recommend and use your company
again. Thank you George



by: Dustin04/20/2022

Fit as expected and made installation quick and clean.



by: Willi Raabe06/18/2013
2011 Ram 1500

Worked like expected. Got to me in good time. Very satisfied! Would order from etrailer again.


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


  • Parts Needed To Install Curt Brake Controller On a 2018 Ford E-Series Cutaway
  • In order to install the Curt Discovery Trailer Brake Controller part # C84VV on a 2018 Ford E-Series Cutaway you should be using the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51432. The Tekonsha Plug-In Wiring Adapter 3034-P won't work.
    view full answer...

  • OL Message on Curt Discovery Trailer Brake Controller
  • There could be a few different things happening with your Curt Discovery Trailer Brake Controller part # C84VV. The first thing that could be happening is that you have a short on the red stop light switch wire. In order to rule this out you will need to probe the red wire going into the back of the brake controller. There should only be power on this wire with the brake pedal depressed. If there is when it is not then you know there is either a short in this wire or the stop light switch
    view full answer...

  • Curt Time Delay Brake Controller Not Working with Brake Pedal on a 2015 Ram 1500
  • First, make sure you are using the proper wiring harness for your 2015 Ram 1500 and Curt brake controller. You should be using # C51438. Next, check the stop light/CHMSL fuses on the truck. On a newer truck it is unlikely that fuses would be blown or missing but its easy enough to check. When a brake controller is not working with the brake pedal it usually means there is an issue on the red wire. With the brake controller plugged in and the fuses good though the only other thing
    view full answer...

  • How Is Curt Time-Delayed Brake Controller Installed
  • Many vehicles designed for towing have a port located under the dash that you are able to use for installing a brake controller like the Curt Discovery Trailer Brake Controller, part # C84VV. There are adapters available for some vehicles and other vehicles will require hard wiring when installing. I have attached a couple of helpful articles that explains brake controllers and their installation you can check out. If you want to send me information about your vehicle like the year
    view full answer...

  • Tapping Into Brake Light Circuit to Install Brake Controller In a 2011 Chevy Equinox
  • On a 2011 Chevy Equinox you cannot tap into the brake light switch to install a brake controller. You have to get the signal from the BCM (body control module). It is located up under the dash to the left of the brake pedal. There is a 26-pin connector. You need the wire in position 11. It should be a white wire. I have included a picture that should help. I have also included a link to another answer page to the right that also has that picture.
    view full answer...

  • Adding a 7-Way Trailer Connector and Brake Controller to a 2004 Nissan Xterra
  • I will be happy to clear up what all you will need to add the equipment to tow the trailer and activate the electric brakes. First, if your 2004 Nissan Xterra does not already have a trailer hitch you will need to add one. A popular option is Curt trailer hitch # 13183. This is a Class III hitch with a 2 inch receiver. The hitch itself is rated for 400 pounds tongue weight and 4,000 pounds gross trailer weight but limited to the vehicle capacity if lower. I also recommend etrailer
    view full answer...

  • Parts Needed to Install the Curt Discovery Brake Controller # C51120 on a 2013 Dodge Durango
  • The Curt Discovery Trailer Brake Controller, # C84VV, and the Custom Wiring Adapter, # C51446, will work on your 2013 Dodge Durango without splicing as long as your Durango came with a factory 7-way trailer connector at the trailer hitch. The 7-way trailer connector would indicate that your truck has the factory tow package, which would include a brake controller plug under the drivers side dash. You should see a gray connector just to the left of the steering column. If your Durango
    view full answer...

  • Parts Needed and Method to Install Curt Trailer Brake Controller on 2007 Chevy Silverado
  • You may or may not need an additional wiring harness to install the # C84VV. If your 2007 Chevy Silverado is the new body style you will not necessarily need the harness, but if it is a Classic you will need harness # C51352 because there is a port under the dash on the floor, on the far left. One end plugs into the controller, the other end plugs into the port. The port is located in a junction box. There is a black cover on the box. Remove the cover and plug in the harness in the
    view full answer...

  • Wiring Adapter for Installing Curt Discovery Brake Controller on 2014 Ford Explorer
  • To install the Curt Discovery # C84VV brake controller on your 2014 Explorer, you'll need the Curt wiring adapter, part # C51322.
    view full answer...

  • Which Install Harness for Curt Discovery in 2018 Ram 1500
  • To install the Curt Discovery part # C84VV in your 2018 Ram 1500 all you need is the quick install harness part # C51458 which plugs into the port under your dash for an easy install that doesn't require any hardwiring.
    view full answer...

  • Brake Controller Installation on 2011 Toyota Tundra
  • If your 2011 Tundra has the factory tow package, which includes the factory installed 7-way trailer connector on the rear bumper, it will be equipped with the tow package plug under the dash, as shown in the photo I've edited for you. Some models with the factory 4-pole (or 4-pin) trailer connector will also have the plug under the dash, you'll need to look for a white plug located above and to the left of the emergency brake pedal, above the toe kick. Occasionally, the plug will be located
    view full answer...

  • Where to Connect Brake Controller Red Wire on a 2009 Volkswagen Tiguan
  • It is possible that on your 2009 Volkswagen Tiguan you will need to follow the alternate installation instructions for the Touareg. I have included a link to an article that explains this. That would be if you are unable to locate a proper dedicated brake light only circuit. The first place to check is above the brake pedal. Look for a brake switch with wires going in and out of it. Use a circuit tester such as # PTW2993 to probe the wires (the key may have to be in the on position).
    view full answer...

  • How Does Brake Controller Install in 2012 Ford F-150
  • When installing the Curt Discover part # C84VV with the harness for your 2012 Ford F-150, part # C51436 all you'd have to do is plug in the controller and harness and you'd be set if you have the factory 7-way like it sounds like you do. It's really a pretty simple install. Otherwise you'd need a 4-way to 7-way adapter like part # 37185 and you'd have to run the wire from the truck's frame rail to the adapter and you'd be set. See attached picture for more info on that.
    view full answer...

  • Trailer Hitch Recommendation for 1996 Cadillac Fleetwood Hearse with 38 Inch Frame
  • While a custom fit hitch for your 1996 Cadillac Fleetwood Hearse is not an option, the Multi-Fit Trailer Hitch # 5350 may work for you. The hitch is adjustable to fit vehicle frames from 24 to 46 inches wide, has a capacity of 5,000 lbs and features the 2 inch receiver you wanted. It requires no welding and all hardware to install it is included. Since your frame is recessed a good 16 inches behind the vehicle's fascia, your best option is to go with an extra long ball mount like
    view full answer...

  • Troubleshooting Brake Controller that Only Works with Manual Override Lever
  • The issue is related to the stoplight circuit that the brake controller connects to with it's red wire. The red wire of the controller needs to connect to a circuit on the vehicle that only sees voltage when the brakes are applied. Most likely the red wire lost connection to where it was installed or you blew a third brake light fuse which killed this circuit as well. I also attached a help article on troubleshooting brake controller installs for you to check out as well.
    view full answer...

  • Troubleshooting Brake Controller that Flashes When Connected to Trailer
  • It sounds like the problem is corrosion on the trailer 7-way brake output circuit which is causing the controller to only show an intermittent connection. Try cleaning off this pin on the 7-way with some fine grit sandpaper. 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 part # PTW2993, you should get output to the controller side of
    view full answer...

  • Will Curt Discovery Brake Controller Work With a 2003 Cadillac Escalade?
  • The Curt Discovery Trailer Brake Controller, # C84VV, is a fit on your 2003 Cadillac Escalade, though it will require the use of the Curt Custom Wiring Adapter, # C51352. This product simply plugs into the port that is located in the junction box that is under your dash to the left of your steering column. The exact spot it plugs in will be on the top row, second slot from the left.
    view full answer...

  • 2014 Cadillac Escalade Wont Start After Curt Brake Controller Installation
  • Thanks so much for the purchase from us of the Curt Discovery Trailer Brake Controller # C84VV for your 2014 Cadillac Escalade, and I'm sorry to hear of this issue you are having. This controller, which you'd use with Wiring Adapter for Curt Trailer Brake Controllers # C51515 assuming the Escalade had a factory 7-way already, should not have anything to do with the vehicle starting or not, which means there was a mistake somewhere along the way with the wiring process. I have added a
    view full answer...

  • Curt Discovery Brake Controller # C84VV Generates Output Signal at All Times
  • Thank you for your recent purchase from etrailer of a Curt Discovery Brake Controller # C84VV and harness # C51515. The blue output wire on your Discovery brake controller should carry an output signal under two conditions: when the brake pedal is pressed or when the manual override slide bar is engaged. Since your unit generates output continuously without either of these conditions met this means that either the unit is malfunctioning or that the red input signal wire to the controller
    view full answer...

  • Does Curt Brake Controller Adapter for 2010 Ram 1500 Fit a 2018 Ram 1500
  • The adapter that fits the 2018 Ram 1500 is part # C51458. The # C51438 that you used in your 2010 Ram only fits through 2012
    view full answer...

Info for these parts were:

Employee Leah B
Edited by:
Leah B
Employee Lindsey S
Written by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

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