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

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

Retail:$131.95
Our Price: $99.95
You Save: 24%
Trailer Brake Controller
Shipping Weight: 0.67 lbs
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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. Great Prices for the best trailer brake controller from CURT. Curt Discovery NEXT Trailer Brake Controller - 1 to 4 Axles - Time Delayed part number C84VV can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (14)
  • Q & A (0)
  • Photos

CURT Trailer Brake Controller

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

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

Item # C84VV

Installation Details C84VV Installation instructions



Customer Satisfaction Score:


Customer Reviews

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

Average Customer Rating:  4.6 out of 5 stars   (14 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.

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Tested . Work fine and advertised



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excellent service and delivery.



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Like its compact size and simple operat ion.



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Very helpful, knowledgeable and friendl y!



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14
14

See what our Experts say about this CURT Trailer Brake Controller

  • What Is The Blue Connector For In The Glove Box Of The Ram 2500
    I will be happy to explain how why the blue plug would not be installed in the wiring bundle. The blue plug is an adapter that's used to install an after-market brake controller. When installing a brake controller vehicles sometimes already have a plug and play connection under the dash. A plug and play connection is a connection that does not require the brake controller to be hardwired to the vehicle. Some brake controllers like # 90195 will need a plug or adapter like you have the #...
    view full answer...
  • Is There a Plug and Play Brake Controller Adapter for Curt Discovery in 2016 GMC Canyon
    I may have a solution for you, but there is not a plug and play harness to install a brake controller like the Curt Discovery # C84VV in a 2016 GMC Canyon. However you can use the # C51515 to provide you with a pigtail harness to hard wire the controller into the new truck. This would be the best and only available solution for you to install this in your new Canyon. You'd just need some heat shrink butt connectors like the # DW05745-5 to make the connections and you're all set.
    view full answer...
  • Curt Discovery Trailer Brake Controller # C84VV Displays Only a Red Dot After Installation
    If your Curt Discovery Trailer Brake Controller # C84VV displays only a red dot when you do NOT have a trailer connected then this indicates that the controller's red (input signal) wire is connected to the wrong side of the brake light switch. This red wire should connect to the COLD side of the switch that has power only when you press the brake pedal. If your Discovery displays the red dot when you DO have a trailer connected then this usually indicates a problem in the trailer brake...
    view full answer...
  • Compatibility of Curt Discovery Brake Controller With 2010 Chevy Silverado
    Brake controllers are not vehicle specific. The # C84VV Curt Discovery brake controller is compatible with your 2010 Silverado. You'll also need the Universal Curt Brake Controller Pigtail, part # C51515. The pigtail wire will connect directly to the tow package wiring located under the dash between the steering column and the emergency brake pedal. Look for a bundle of wires with a white tag hanging from it. The wires of the pigtail will connect to the tow package wiring as follows: Red...
    view full answer...
  • 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...
    view full answer...
  • Gauge Wire Recommendation for Installing Curt Discovery Brake Controller
    Curt does recommend that you use 10 gauge wire like part # 10-1-1 sold by the foot to install the Curt Discovery # C84VV, but the common recommendation for installing brake controllers is to use 12 gauge or larger wire. If you use 12 gauge wire you should be just fine, especially since you will only be activating 4 brake assemblies.
    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 # EA40...
    view full answer...
  • Brake Controller Wiring Harness for Curt Discovery in 2017 Chevrolet Colorado
    Brake controllers are not vehicle specific technically the Curt Discovery # C84VV will work in your 2017 Chevrolet Colorado. The # C51515 wiring harness is the correct one for the Discovery.
    view full answer...
  • Troubleshooting Curt Discovery Brake Controller Issues on Ram 1500
    The Curt Discovery Brake Controller # C84VV is a time-delay type that is intended to send out a pre-determined amount of braking power after you have applied the vehicle brakes. The other type that is often preferred is the proportional type that will actually sense the amount of braking force in the tow vehicle and send a proportional amount of braking power to the trailer, without a time delay. Based on the symptoms you described I think the issue could be with the wiring on the trailer....
    view full answer...
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  • No Brake Output on Curt Discovery Trailer Brake Controller
    If you have power going into the Curt Discovery Trailer Brake Controller part # C84VV on the black wire, the ground has good continuity, and you have power on the red wire while the pedal is pressed and there is no output on the blue wire then it's safe to say the controller is bad and will need to be replaced. That said, please make sure you are checking the wires directly behind the controller so you can rule out any other issues down the line. The Curt Discovery is a timed delay controller...
    view full answer...
  • Curt Brake Controller Adapter Harness for a 2020 Jeep Grand Cherokee
    In order to install the Curt Discovery Trailer Brake Controller part # C84VV on a 2020 Jeep Grand Cherokee you will need the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51446 which makes for a plug and play installation.
    view full answer...
  • Curt Brake Controller, Wiring Harness 1999 F-350 Super Crew
    The Curt brake controller # C84VV can plug directly into your 1999 F-350 Super Crew using the proper wiring harness, # C51322. This harness is sold separately. I have included a link to a video to the right that shows where the connection point on a similar truck. The brake controller and harness are different in the video but they plug into the same place on the truck.
    view full answer...
  • Wiring Adapter to Install a Curt Discovery Electric Brake Controller in a 2005 Toyota Tundra
    The Curt Wiring Adapter # C51362 is what you need to install a Curt Discovery Electric Brake Controller # C84VV in your 2005 Toyota Tundra as long as the truck has a factory 7-way trailer connector.
    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...
  • Does Dealer Need to Turn on Aftermarket Brake Controller in a 2015 Ford F-150?
    There will be no need for you to go to take your 2015 Ford F-150 to the dealer to have them turn on an aftermarket brake controller. The brake controller I recommend that you need only an adapter for is the Curt Discovery # C84VV. Since you already have the factory tow package, just use the Plug-In Wiring Adapter # C51436. Plug one side into the brake controller and the other side into the wiring on your F-150 and you are done.
    view full answer...
  • Where to Connect the Adapter to Install a Curt Brake Controller in a 2017 Nissan Pathfinder
    To install a Curt Brake Controller, like the Discovery # C84VV, on your 2017 Nissan Pathfinder you will simply need to plug the Custom Wiring Adapter # C51382 under your dash like you mentioned. I am attaching a video where one of our install guys installed a Tekonsha Prodigy P2 # 90885 in a 2013 Pathfinder using the Tekonsha Wiring Adapter # 3050-P. If you skip to the 2:45 mark you can see where he plugs in the adapter for the Prodigy P2. Your Curt adapter will plug into the same place.
    view full answer...
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  • Troubleshooting Trailer Brake Controller that Only Functions When Engine Isnt Running
    That is an interesting problem you are having, but the problem lies somewhere in the wiring of the brake controller/7-way. The only way a brake controller is going to work properly with the key in the ACC position but not when the vehicle is running has to be due to wiring. Check to make sure there are no shorts between the two wires you ran to the rear of the 7-way. It sounds like you ran a wire for the 12 volt accessory circuit and an additional wire for the brake output. You might...
    view full answer...
    Image 1 for
  • Will A Curt Discovery Brake Controller Work in a 2016 Toyota 4-Runner
    Yes, your Curt Discovery Brake Controller # C84VV is compatible in 2016 Toyota 4Runner. The Curt Custom Wiring Connector # C51362 will be the connector that you will need to install the brake controller in your 4-Runner.
    view full answer...
  • Wiring Needed to Install Curt Discovery Brake Controller on 2005 Toyota Tacoma
    There are a few different ways to connect the Curt Discovery Trailer Brake Controller # C84VV to your 2005 Toyota Tacoma and it just depends on whether you have the tow package or not. I've listed what you'll need in both scenarios below. With Tow Package Curt Discovery - # C84VV Wiring Adapter - # C51362 Without Tow Package Curt Discovery - # C84VV Pigtail - # C51515 4-Way Wiring - # C55513 (if you don't already have one) Wiring Upgrade Kit - # ETBC7 (if you don't already have one)
    view full answer...
  • Troubleshooting Flashing Display of the Curt Discovery Brake Controller part # C84VV
    The flashing O.L. message with the Curt Discovery Brake Controller part # C84VV when there is no trailer connected indicates that there is a short somewhere on the brake output circuit. I would check all the connections you made on the blue wire from the controller and then also check the trailer connector at the rear of the vehicle looking for any exposed wire or corrosion and fix as necessary. If it only flashes O.L. when the trailer is connected the problem is the same as above but...
    view full answer...
  • Brake Controller Wiring Adapter for a 2015 Toyota Tacoma with Factory 7-Way
    No worries, the 5-wire harness will work just fine because the extra connection is for the illumination circuit and it's not needed. The Curt Discovery trailer brake controller # C84VV is a fit for your 2015 Toyota Tacoma and the direct fit pig tail adapter # C51362 you referenced is correct. You will simply plug the adapter # C51362 into your factory brake controller tow port and route the pigtail to the location of your choice so you can connect your brake controller.
    view full answer...
    Image 1 for
  • Curt Discovery Brake Controller Displays Decimal Point When Not Connected To Trailer
    The Curt Discovery Trailer Brake Controller - 1 to 4 Axles - Time Delayed, # C84VV, is working properly. It is designed to display the decimal when no trailer is connected and number when connected. The numbers should increase as you activate your manual override when connected to the trailer as well. I have attached the installation details for you and a video to help.
    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...
  • Curt Brake Controller Wiring Harness for 2018 Ford F-150
    Curt replaced the 51437 with the # C51436 which fits a 2018 Ford F-150 (among other Ford vehicles) and is compatible with the # C84VV Curt Discovery brake controller.
    view full answer...


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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Chris R
Video Edited:
Chris R
Employee Michael B
Installed by:
Michael B
Employee Aidan B
Installed by:
Aidan B
Employee Charles A
Video by:
Charles A
Employee Amanda K
Written by:
Amanda K

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