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,C51525
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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.
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
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: C51525
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.
51525 Curt Quick Plug Brake Control Adaptor Harness
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
- Defective
- Product did not meet expectations
- Alternate product found
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 - C51525
Average Customer Rating: 4.8 out of 5 stars (83 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: Thomas03/07/2024
Chevrolet Silverado
This is used on a 2020 Chevy Silverado 1500 pulling a 16' enclosed cargo trailer. With the appropriate adaptor cable it was very easy to install, just plug in and mount in a convenient spot. Once installed it was simple to get it matched to the weight and brake setup of the trailer. Close to 6k miles with it so far & very happy.
by: Brian 04/21/2024
2024 Chevrolet Silverado 1500
The combo of the Curt Spectrum brake controller and wiring harness made installation a snap
by: Travis 09/06/2022
2022 Chevrolet Silverado 2500
The wiring adapters worked great. It made installation quick, easy, and clean.
by: Jerry 04/25/2024
Tested . Work fine and advertised
by: Ethan 03/15/2024
excellent service and delivery.
by: Damon 04/09/2024
Makes hookups fast and easy.
by: Andy 02/10/2024
Product was perfect for my use.
by: Adam 02/07/2024
It does what it's supposed to.
by: Floyd 02/07/2024
Fit properly
by: Pamela01/09/2021
We got a new truck and needed to convert our trailer breaking unit to the new truck. I wrote to be sure what I needed, got an answer right away, ordered it, and it was easily installed!
by: Sidney 09/21/2023
Like its compact size and simple operat ion.
by: Dusten09/21/2023
Very helpful, knowledgeable and friendl y!
by: James 09/05/2023
The right part as needed
by: David 05/30/2020
Plug and Play installation with this cable! Thanks!
by: Timothy 09/27/2021
Perfect fit that made it easy to plug in and go
by: Bobby B09/24/2020
Worked great with the Controller, and was a simple plug and play installation
by: Howard03/26/2021
The products are excellent and the installation instructions are very easy to follow. Products are very well made
by: Ron R01/06/2021
Adapter is well worth it! No fussing with the wiring, just plug and go
by: Tom 09/22/2022
Easiest ever!!!
by: Donald09/20/2020
2020 Chevrolet Silverado 1500
Was just able to install controller, everything went really smooth, works great, thank you for the quick delivery as always.
by: Steve09/13/2021
Easy install with good instructions. Works well!
by: Michael11/03/2022
Works great looks great
by: Lewis 10/04/2021
Easy to install.
by: John05/27/2022
It had the correct connections and works perfectly!
by: Michael 02/16/2021
Michael
2/17/2022
One year on and still functioning fine
25
83
Show More Reviews Ask the Experts about this Trailer Brake Controller
Do you have a question about this Trailer Brake Controller?
- Curt Discovery Brake Controller Is Only Showing A Dot When Engaging Manual Override
- The Curt Discovery Trailer Brake Controller, # C84VV, should show only the decimal point dot when the controller is activated and a trailer is not connected. If it shows the dot all the time, the red wire is connected to the wrong side of the stop light switch or the wrong switch completely like the cruise control.
If you have only the decimal point when the trailer is connected, the usual cause is that the brake controller does not sense the trailer brakes. This could be due to corrosion
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... - Harness Needed To Install Curt Trailer Brake Controller On 2021 Nissan Frontier w/ Tow Package
- In order to install the Curt Discovery part # C84VV on a 2021 Nissan Frontier with factory tow package you'll simply need the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51382.
view full answer... - Brake Output on Connector with No Trailer Connected Using Curt Discovery Trailer Brake Controller
- In regards to the Curt Discovery Trailer Brake Controller part # C84VV, there should not be power on the brake output pin inside the trailer connector without a trailer hooked up. There could be a few different things causing this but in order to rule out the brake controller you'll want to do a bench test outlined below. If the controller test good then that means you have a short on the brake output wire on the vehicle and you'd need to start tracing and checking for shorts. It may also
view full answer... - 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... - How to Properly Set Up Curt Discovery Time Delayed Brake Controller
- To properly set up the Curt Discovery brake controller part # C84VV you first need to set the max output setting with the thumbwheel (number 2 in picture) on top of the controller. You want to adjust this to a setting that when you slide the manual override lever (number 4) all the way grabs the brakes as hard as possible right before locking up.
Once that's set the next setting is the sync setting (lever on side number 3) which controls how fast the brake pressure ramps up to full
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... - 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... - Issues with Brakes Not Activating with Curt Discovery Brake Controller on 2015 Ram 1500
- I spoke with my contact at Curt about the issues you and other customers have experienced with their Curt Discovery Brake Controllers # C84VV and newer model Ram trucks.
The problem stems from a low voltage output on the stoplight wire on the truck. The Discovery requires 12 volts from the stop light wire in order to recognize the signal and activate the trailer brakes. Curt has found that the newer Ram trucks often have less than 12 volts at the stop light wire when the brake pedal
view full answer... - Is The Curt Discovery Trailer Brake Controller Supposed To Light Up When Vehicle Is Started
- The Curt Discovery Trailer Brake Controller # C84VV is supposed to light up when you switch on the ignition or start your 2009 Chevrolet Silverado. With no trailer connected you should just see the period(.) on the screen.
view full answer... - Brake Controller Install Harness Recommendation for Curt Brake Controller in 2009 Chevy Silverado
- To install the Curt brake controller part # C84VV in your 2009 Chevy Silverado requires the install harness part # C51515 but this is a harness with 4 blunt cut wires that you'd need to wire to the blunt wires under the dash of your truck since a plug and play harness isn't available. It's a pretty simple process though. You'd just need blue butt end connectors like the # DW05744-5 and you'd be set. I attached an install video that shows the install on a similar Silverado for you to check
view full answer... - How Would Curt Brake Controller Install Harness Wire to Tekonsha Controller in 2017 Chevy Tahoe
- So the Curt trailer wiring harness # C51451 that you referenced for your 2017 Chevy Tahoe can very easily be wired to your Tekonsha Voyager # 39510 by just matching the colors between the two harnesses. All of the color/functions are same so it's a really easy swap.
Or you could use the install harness # 3016 which would plug straight into the Voyager and to the install port of your 2017 Chevy Tahoe for the brake controller.
view full answer... - 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... - Will the Curt Discovery Trailer Brake Controller Plug Into a 2000 Ford Expedition
- Yes, the Curt Discovery Trailer Brake Controller # C84VV will plug right into the connector under your driver's side dash on your 2000 Ford Expedition, with the Adapter # C51322.
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... - 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... - 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... - Recommended Trailer Hitch, Wiring and Brake Controller for 1994 Chevy C/K Series Cab and Chassis
- The Draw-Tite Class V hitch, part # 41947 will most likely work for you. The hitch has a drop (distance from the bottom of the frame to the top of the receiver tube) that's adjustable to 6-5/8, 8-1/4 or 10-1/4 inches. One of these distances should allow your receiver tube to clear the bottom of the back bumper, but you'll want to measure the distance from the underside of the frame member to the lowest point of the rear bumper.
For wiring, you'd begin with a 4 pole, provided by # 118315.
view full answer... - Troubleshooting "Short" Error Code On Curt Discovery NEXT Trailer Brake Controller C84VV
- Hello Surg. It is definitely odd that you are seeing the "short" error code on the Curt Discovery NEXT Trailer Brake Controller # C84VV, especially since your Tacoma was pre-wired from the factory. Nonetheless, this error code is definitely not normal, and is an indication that something is wrong. The display should show the current gain setting when the manual override is applied.
With no trailer connected, the "short" code means that the red wire is connected to ground side of the stoplight
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... - How Would Brake Controller Install in 2021 Chevy Tahoe
- If that part is available it would be through GM only. But you could also bypass needing a connector and just wire what you have found directly to a brake controller like the Brake EVN part # TK63VR instead. For this controller the black wire is the 12 volt power wire, red is stoplight circuit, blue is brake output, and white is ground.
view full answer... - Parts Needed To Install Curt Assure Trailer Brake Controller On a 2024 Chevy Silverado 2500
- The Wiring Adapter # C51525 will allow you to connect the Curt Assure Trailer Brake Controller # C49UR on your 2024 Chevrolet Silverado 2500HD.
view full answer... - Where is the Factory Trailer Brake Controller Port On a 2022 Chevrolet Tahoe
- If your 2022 Chevrolet Tahoe does not have the factory tow package then the plug may not be there. If this is the case you would need to hardwire in a brake controller. If your Tahoe does have the tow package then the plug will be under the dash. The plug will often times be taped together with another harness making it not always apparent that it is the plug you are looking for. You may need to do some searching to find the correct plug.
Currently at this time (2/10/2022) the only adapter
view full answer...
Info for these parts were:
Edited by:
Lindsey S
Expert Research:
Jameson C
Installed by:
Kathleen M
Updated by:
Wilson B
Updated by:
Kristina F
Updated by:
Isabelle B
Written by:
Ronnie R
Video by:
Jonathan Y
Test Fit:
Matthew B
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Travis
9/8/2023
The wiring adapter made connecting the trailer brake controller so quick and easy that I dont think I will ever use butt splices again.