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Curt Spectrum Trailer Brake Controller - Dash Mounted Knob - 1 to 4 Axles - Proportional
Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In

Part Numbers: C51170,C51453

Retail:$348.07
Our Price: $270.72
You Save: $77.35
Trailer Brake Controller
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Curt Spectrum Trailer Brake Controller - Dash Mounted Knob - 1 to 4 Axles - Proportional
part number: C51170

Mount the control knob of this proportional brake controller on your dash for a from-the-factory look, and install the main unit out of sight behind the dash in any position or angle. Adhesive backing gives you the option of a drill-free install.

Features:

  • Brake controller activates trailer brakes in proportion to your vehicle's braking action
    • Automatically adjusts trailer's braking based on deceleration of tow vehicle
  • Dash-mounted knob keeps your vehicle interior looking sleek while giving you easy access to the brake controller
    • Lets you adjust braking output and sensitivity with the turn of a dial
    • Gives you a manual override at your fingertips
    • Offers simple diagnostics with colored LED indicators
    • Mounts to dash with included screw, or you can use the included adhesive pads for a drill-free installation
  • Main unit installs out of sight behind the dash in any position, direction, and angle
    • No more banging your knee on a bulky controller
    • No interference with airbags or other vehicle accessories
    • Custom plug-in adapter (sold separately) available for select vehicles to reduce installation time
  • Compatible with ABS brakes, cruise control, low-voltage wiring, multiplex wiring, and PWM systems
  • Assembled in the USA


Specs:

  • Application: trailers with up to 4 axles (8 brake assemblies)
    • Compatible with electric or electric-over-hydraulic trailer brakes
  • Main unit dimensions: 3" long x 3-1/2" wide x 7/8" tall
  • Control knob dimensions:
    • Extension: 1-1/2"
    • Diameter: 1-3/4"
  • Cable length: 4'
  • Limited lifetime warranty


The Curt Spectrum brake controller is all about easy installation and keeping the interior of your vehicle clutter-free. With the main unit mounted out of sight behind the dash, all you need is the control knob to operate the settings on the brake controller. You won't be banging your knee on a bulky controller or ruining the sleek look of your interior.


Curt Spectrum Operation

The Spectrum's dash-mounted knob puts control of your trailer's brakes at your fingertips. In addition to giving you fast, simple power adjustment and a manual override, it has colored LED indicators to offer diagnostics and let you know what the brake controller is doing at a glance.


Curt Spectrum Dash-Mounted Knob

The Spectrum has a full menu available in the control knob so you can get your settings just right. To switch between modes, press the control button in the center of the knob. Each mode has its own distinct LED display with several different colors and patterns to eliminate any guesswork as you cycle through.


Curt Spectrum LED diagnostics

Output: Braking output 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 set the braking output as high as you can without locking up the brakes. Adjust the braking output by applying your brakes and turning the knob clockwise. Once you've set up the brake controller the first time, you shouldn't need to adjust the settings until the trailer load changes, you switch trailers, or road conditions change.


Sensitivity: This controls the aggressiveness of your trailer's braking, meaning how quickly the brakes reach the set output level. This is a great adjustment to make when you're towing a heavy load and the trailer will need more umph to bring it to a stop so it doesn't push your vehicle forward. If your vehicle takes too long to come to a stop, increase the setting. If it stops too abruptly, lower the setting. You may also need to adjust the sensitivity based on your own preferences, or when the trailer load or road conditions change.


Manual Override: The Curt Spectrum keeps the manual override within easy reach. The manual override functions as time-based for a slow reduction in trailer braking, great for stopping sway or controlling your trailer's momentum in an emergency. To engage the manual override, just press and hold the button on the control knob. 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.


Curt Spectrum review

Simple, Out-of-the-Way Installation

Unlike many proportional controllers on the market, the Curt Spectrum has almost no mounting restrictions. It comes in 2 pieces: the main unit and the control knob. Because the only part that you need to be able to access is the control knob, the main unit can be mounted out of sight and out of the way. You don't have to worry about dinging your knee on a bulky brake controller or interfering with your vehicle's lower airbags.


Curt Spectrum Dash Knob

The dash-mounted control knob can be installed in any convenient spot that's easy for you to see and reach. This can be a blank switch panel, an open spot on your center console, or wherever there's space on your dashboard. Because the knob sits flush against the dash, you don't have to worry about clearance behind the dash when you're installing it either. You can either use the included screw to mount the knob or use the adhesive pad for a drill-free installation.


Curt Spectrum Install

Once you've decided where you want to put the control knob, you'll need to find a good place to install the main unit. Your only restriction is the 4' plug-in cable that has to be able to reach between the main unit and the control knob. Thanks to the 3-axis accelerometer, the main unit can be positioned at any angle or position. No matter how you install it, the unit will sense the direction of travel and its orientation.


If your vehicle already has a plug-in brake controller wiring harness, just connect the main control module 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.


Installation Accessories

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.


Note: If a custom brake control wiring adapter is not available for your vehicle, a 30-amp circuit breaker (sold separately) may be required for installation.


Proportional Braking

What is proportional Braking

The Curt Spectrum brake controller comes equipped with proportional braking to give you the best towing experience. Proportional braking means that your trailer brakes mimic your tow vehicle's brakes. If you slam on the brakes in your vehicle, your trailer brakes will activate with the same intensity; if you brake lightly, your trailer brakes lightly too. The trailer's braking is in proportion to your vehicle's braking. This saves wear and tear on the tires and the brakes on both your vehicle and trailer.


The Spectrum 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 ensure that your trailer slows at the same rate. The result is uniform braking across your towing setup. No push-pull action - just smooth, proportional braking every time.



51170 Curt Spectrum Trailer Brake Controller - Dash Mounted Knob - Proportional - 1 to 4 Axles

Item # C51170

California residents: click here



Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In
part number: C51453

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 connectors plug 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 ports on your vehicle's built-in brake control wiring harness. The harness is located underneath the dash, above your gas pedal, and it is taped to another harness.


No hardwiring is required to install this adapter. After you plug it into the 2 factory ports, 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.



51543 Curt Quick Plug Brake Control Adaptor Harness

California residents: click here




Customer Satisfaction Score:


Customer Reviews

Curt Spectrum Trailer Brake Controller - Dash Mounted Knob - 1 to 4 Axles - Proportional - C51170

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In - C51453

Average Customer Rating:  4.6 out of 5 stars   (350 Customer Reviews)

Mount the control knob of this proportional brake controller on your dash for a from-the-factory look, and install the main unit out of sight behind the dash in any position or angle. Adhesive backing gives you the option of a drill-free install. 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: Henri10/03/2022

This is my 2nd purchase of Curt spectrum brake control. When installing the first device, I accidentally broke one of the 6 wires (wiring the plug connector to the led display knob). I tried to fix it but it didn't work for long. That's why I had to order a 2nd device. For the installation of the 2nd, I was very meticulous because the 6 wires are very fragile. I succeeded by taking my time and everything works very well. The Curt company would do well to manufacture this device more robustly. For looks, it's ok in my 2019 Honda Passport.

Ceci est mon 2e achat de Curt spectrum brake control. Lors de l'installation du premier appareil, j'ai par accident brisé un des 6 fils (wiring the plug connector to the led display knob). J'ai tenté de le réparer mais il n'a pas fonctionné longtemps. C'est pourquoi j'ai dû commander un 2e appareil. Pour la pose du 2e, j'ai été très minutieux car les 6 fils sont très fragiles. J'ai réussi en prenant mon temps et le tout fonctionne très bien. La compagnie Curt aurait intérêt à fabriquer cet appareil de façon plus robuste. Pour l'apparence ,c'est ok dans mon Honda Passport 2019.



by: Eric07/26/2023

Works great. (Better than any standard brake controller ive used in the past) Easy plug and play operation
I chose to not drill into my dash rather just ran the cord up by the steering column



by: Charles 10/11/2022

Looks great and works well. Only gripe I have is that I don't use it enough to remember what all it does at the different light colors. More of an issue for me, not the product. Matches my 2020 Ford Explorer interior and other dials. Looks factory.



by: Mike10/13/2022

I ordered the Curt Spectrum trailer brake controller after much research. I was looking for a brake controller with a clean looking install (I didn't want an underdash mount) for my 2020 Chevy Blazer. My Blazer had the tow package from the factory which made the install fairly easy. All the wiring for a brake controller is there behind the driver side kick panels. The Curt Spectrum once installed and adjusted works flawlessly. Just follow the enclosed instructions to adjust the Spectrum for the load you are hauling. I could not be any more pleased with the way this product works and highly recommend the Curt Spectrum brake for your auxiliary braking needs.



by: Bob In Florida01/12/2019

After knocking my knee into my brake control for the last 20 years with the new GMC Savana I wanted something a little different. Technology has moved trailer brakes forward quite a bit and Etrailer has an immense amount of information!
I original looked at the Tekonsha Prodigy RF Wireless Trailer Brake Controller but it would take up a valuable power outlet with the control unit but it's kind of trailer specific as the control mounts to the trailer you never know when you might have to tow another trailer and was leery of the control wandering around the console, Next up was the Redarc Tow-Pro Elite Trailer Brake Controller but did not like the control mounting options. Then ran across the Tuson DirecLink Lite Trailer Brake Controller crazy amounts of technology in this unit but again concerns over the remote so after lots of head scratching the Curt Spectrum seemed like the best choice. Easy install very small control box mounted easily with the included double stick tape under the dash. I moved my traction control button to the left where a blank filler was you have to cut a little piece of it off to get it into the hole as the are "keyed" to specific locations I guess but worked perfectly! I left enough slack in the connection so I can simply disconnect the harness if I am not towing for awhile as the blue indicator lights come on every time you hit the brake if its disconnected. Just installed it so I will send an update after our first trip with the new rig but I'm thinking it will work as described. Thanks again etrailer fast shipping great information!!!!



by: George05/26/2019

2019 Honda Ridgeline RTL AWD—
The Curt
Spectrum C51170 controller and harness C51392 was exactly as I had read it would be! All connections hooked up as described and all connectors fit! The knob works as described but I have yet to hook up trailer to get response from the accelerometer! I’m sure the quality shown it will work fine! Only problem I had was access under the dash. Thanks Bill and etrailer! Pictures attached!



by: Evan11/09/2019

I knew I wanted to have something like this due to the look, function and size. The package was small. Installed pretty easily with minimal headaches. I just watched the videos online to see how others did it and how to steer away from making damaging mistakes. The booklet was also very helpful to make everything fit as it should while putting the steps in order.

As I pull a trailer 90% of the time, I wanted something to have the easy manipulation for the brakes yet have an aesthetically pleasing look. This does just that. Brakes on one setting. Adjustable on two other settings. Very quick.

Although I did have to play with the settings to make sure it wasn’t jerking me in my seat every time I pushed the brake pedal, after a day, smooth sailing.

I do recommend you seriously think about this brake controller. Ease of install and the application is perfect.



by: Barry12/02/2022

This brake controller works perfectly for my 2014 Audi Q7! The instructions were easy to follow thereby making the installation a straightforward process. The hardest part was deciding where to install the dial. The dial has a solid and deliberate feel when turning and numerous options for fine tuning.



by: Doug04/26/2020

I bought this because I wanted a factory look. This was easy to install and looks great. You have to learn what the different colors and settings do but it’s not that difficult. Overall I am very happy with this brake controller.



by: Jeff E07/29/2020

The compact remote control knob feature is a good plus for this product. Installation was really easy with the interface harness on the second generation Tacoma. I haven't had a lot of towing time with it but can offer the following insight.

The control lights are easy to use and adjust. They appear to be dimmed with pulse width modulation so if your eyes are sensitive to it you might look at one before you buy. Hopefully they can go PWM-free at some point. The "white" color lamps appear as a mix of flashing red green and blue. Indicator lights are plenty bright in the daytime but the lowest dim setting is too bright. Perhaps this was done to minimize the PWM flashing at the dim setting. I had to locate the knob in the shadow of the steering wheel to keep the light out of my eyes at night.

I've also noticed a single artifact light on many occasions after brake release (see pictures). So far the lamp color has been red, green, and blue however I have not yet seen a "white" one. One of these lights often come up in random positions on the dial. This lamp will continue to burn after I get out of the truck, and won't go out until I press the brake pedal again or push the knob. If I push the knob the output or sensitivity adjustment mode arc comes up briefly and it goes out after a bit (as it's supposed to). OEM brake control harness and grounding were sound with typical resistances around a milliohm or less.

This controller is a considerable parasitic draw on the battery even with the lamps out and the ignition switch off. This could be an issue particularly if an artifact light is not noticed and the truck sits for more than a week(which mine sometimes does). A depleted battery made me look into this with a Fluke ammeter. You might consider pulling the fuse if the truck will sit or hook up a trickle charger.

I tried to make contact with the manufacturer to see if they had any free convection requirements for air flow around the main module (air cooling at 100% duty cycle), and to understand what is going on with the controller and if there was something that could be done to fix the lights, perhaps a firmware update or something but never got any replies. The folks at etrailer maintained good communication and were excellent to work with but I don't feel the manufacturer is willing to support their product. This could be an excellent product if they can address these issues.



by: Brian 04/21/2024

The combo of the brake controller and wire harness made installing a snap!



by: Matt 02/08/2024

Great break controller! I stalled it in a 2020 Hyundai Palisade. Followed a video of the installation which walked me through most of the steps and had to improvise a few more. But all in all it's a great looking and great working controller. It's appearance makes it look like it is just another part of the car.



by: Jordan04/18/2021

This controller is a really good concept but kind of challenging to get dialed in correctly for each load. When braking in a straight line it performs as expected but when braking while turning or on bumpy roads it often times surges the brakes making them lock up.

I have been using this product for 1 year and am now figuring out ways to work around the surges. Best way I've found is to keep the sensitivity on high and only adjust the power setting.

The 4 star rating on this product is for how small and sleek the adjustment knob is vs standard brake controllers installed In the dash it feels almost factory.
Install took about 5 -10 minutes

Overall I am happy with this purchace
it's just not quite as user friendly as I'd hoped.



by: Dan11/23/2019

I really like the finished look of this controller after it is installed (see before and after pictures attached)! I also like being able to finely tune it to my need using the power output and sensitivity adjustments. I do have a minor issue with connecting a trailer to my 2020 Jeep Gladiator, though. If I connect the trailer while the engine is running, the electronic stability control and engine start/stop services on the truck disable themselves. Turning the ignition all the way off an on again resolves the issue, as does having the engine off when I connect the trailer. Aside from that minor inconvenience, this controller works admirably and I would buy it for other vehicles.

Installing was simple with the adapter for factory wiring. The most difficult part was identifying the location for the knob and taking the dash apart to install it properly. The finished appearance is clean and the only visible aspect of the entire system is the control knob.

With the sensitivity and power controls on mid-level, the trailer tires were skidding on quick stops. Tuning the settings to have less sensitivity and less power quickly corrected that issue. I am quite happy with this controller!



by: Beth S02/06/2024

This is our second purchase from etrailer. Their delivery was very prompt and the items were exactly what we needed. The Trailer Brake Controller was simple to install and works absolutely great!



by: Frank08/09/2020

I chose this controller as the main module fits out of sight and does not have to be aligned or leveled. I attached it to the parking brake bracket on our Pilot. The LED rotary control knob fits nicely on the dash and after inserting the cable through a small hole in the dash, connecting the plug was simple with the pins that were attached to the cable. What was confusing was the instructions do not mention there are two base plates - one for adhesive mounting to the dash and the other for drill mounting (what I did). I tried to snap the rotary knob into the base plate I mounted, but it would not fit. I found out that the rotary knob actually comes with the adhesive mount already attached and you have to use a small screw driver to pry it off so you can use the other base plate. Luckily Curt has an installation video on their web site that showed removing the adhesive plate. I generally do not start taking apart precision gear without some hint of what should be done. Curt also has a custom cable that plugs into this unit and the port on my Pilot.

When I get our trailer I will be able to review the performance of this controller.



by: Ian07/11/2020

Worked well in my Infiniti 2017 QX60 but install was not that easy.
First unlike other etrailer products, I could not find an install video for my car. For other Infiniti owners out there, the brake controller connector is located along the wiring harness connected to the OBD connector. You cannot see it as it is lightly taped up, you just need to feel for it and pull it down. Secondly it is *capped*. The cap looks very much like the plug itself so don't be confused. Remove the cap and you can install. Make sure you get the right Curt adapter for your car.
Secondly the install requires the user to insert the crimped controller wires into a connector for control module. There are videos on how to do this however it did not go as easy as shown. Maybe I had a defective part, but there is clearly only one way to insert the wires but I had to insert with significant force to get them in all the way.
Once installed the unit worked fine with my 3,800lb RV trailer. A few nits: Occasionally the control knob will leave as one of its lights on after the car is turned off. Its happens occasionally and can be reset by pushing the brakes again but seems like a bug? Also the knob will *always* light up if you press the brakes even if you do not have a trailer attached. There is no way to turn this feature off and can be kinda annoying if you do not tow that much.
Overall, works as advertised and like how it can be tucked away, but wish the install was better explained for my vehicle and didn't bother if there was no trailer attached.



by: Jay05/10/2020

Great product. Easy install in under 45 minutes to integrate into factory OEM harness. 2017 Land Ro er Discovery Sport with factory trailer tow package will be plug and play with this controller, and Curt custom wiring Adapter C51322. The factory brake controller integration harness is directly behind the OBDII connector on the driver’s side. Everything else is in place. Note: your factory OEM tow connection MUST be dealer activated in your vehicle. Without that activation, the body controller will not pass power to the brake module.

There is ample space inside the dash on the left side, behind the left knee bolster to place the control module in a securable and protected location. This requires only 3 easy to remove panels, and 2 screws to reach. If oriented properly, the DIP switches are accessible in future by removing the dash side panel (zero tools required).

There are multiple locations for the control knob. The look and style of the control knob fits perfectly with the design of the interior. Love the ability to use a drill or no-drill installation method.

We haul our Forrest River travel trailer with this vehicle and previously used a time-based controller that “fought” with the vehicle’s integrated trailer stability control and anti-sway detection. This controller has solved this issue and gives complete control while integrating seamlessly with factory stability systems.

Even with the output or sensitivity at high levels, this system still works perfectly with the vehicle trailer stability control. This was a vast improvement over our old time-based controller.

Great function and fantastic look. For a non-OEM product, this truly does have an OEM look, function and ease of installation. Curt did a great job with this.

My only nit is that both Curt and etrailer do not recognize the factory connection adapter harness as an option on the Discovery Sport. TIP: If you select the Land Rover Evoque (shares the same platform as the Discovery Sport) the options become correct for your Discovery Sport as far as factory adapter harnesses.

Super fast delivery. Would be better if drop-ship items included an actual tracking number instead of only the user login web based tracking option. The web based tracking required logging in to monitor for delivery times. Some kind of automated text or email shipping updates for drop-ship items would make a great buying experience into a fantastic one.



by: timothy04/22/2021


I've had the brake controller in use
for over a year in my 2012 Nissan Frontier. The install was easy and took about an hour. My truck is a 2WD model so I mounted the controller in the plug that is used to select between 2WD and 4WD on vehicles equipped with 4WD. So the install look like factory.



by: Brian09/26/2022

No modifications required. I didn’t want to drill any holes in the new truck dash. This easily mounts in the clip provided with a small cable coming from under the dash.



by: Michael06/15/2021

Everything installed great. The overall look of the knob if excellent. The direct plug in to the Ford OEM brake plug is excellent. Have not towed anything yet.
P.S.: The screw-in base with well nut - which is the more secure option (not the adhesive option) for the knob... the screw prevents the knob from seating perfectly square... the base bottoms out just slightly on the screw. It does click in, the screw is a very flat pan head... perhaps there is a flatter screw or the there is more space in the knob undercarriage, but another 1/16" of space probably gets it just right. If the seating gets weird (i.e in cold weather may shrink cause plastic to contract slightly and lose seating, I can always use a machine screw and nut washer to clean it up... plenty of space to access the fastener from mounting place. 2008 Ford Expedition.



by: Michael09/07/2020

The installation went very quickly and the end result was very satisfying. The location of the switch on the dashboard makes it hard to spot as an aftermarket add on. The whole installation took 1 hour start to finish. I can't wait to tow a trailer so that I can get the Cuurt Spectrum Brake Controller calibrated and dialed in. Thanks etrailer! Thank Curt!



by: Richard S C04/03/2019

Honda Ridgeline 2019 Install
Plan to
tow an RPOD 195 Travel Trailer as soon as I pick it up
Simple Installation
Didn't need to remove dash to install, as free space behind this location.
Knob on lower left of Dash.
Module Tie Wrapped to the Parking Brake Bracket under the Dash.
Used the C51392 Wiring adapter to connect the Brake Controller to the Truck.

Pictures of Dash Install only.
Haven't functionally tested yet as I am waiting on Delivery of the Trailer.



by: Tony08/13/2020

Etrailer.com - Awesome! Excellent customer service. Have dealt with them many times, Knowledgeable, Friendly and Helpful, great products at competitive prices. Highly Recommend.
Curt Spectrum - Neat and clean, straight forward installation. Just make sure the wires to the plug connector are fully seated to the plug connector. Custom wire adapter makes installation plug and play. Picture is 2017 Silverado 1500.



by: Johnboy Willis05/03/2019

Decided I wanted a high quality brake controller without the clunky box on the dash and this seemed like the best out there. Super easy install. I bought the extra cable for my Silverado and it all plugged in perfectly. I saw somebody complain about tiny connectors. Don't listen to them. This thing is excellent and the quality is clearly top tier. The set up was a breeze and on our first trip out I got it dialed in with no problems. Works better than my previous controller by far.


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


  • Is There A Fuse To Power Trailer Brake Controller Port In 2021 Ford E-450 Cutaway Chassis?
  • Since the trailer brake port on your 2021 Jayco built on the Ford E-450 Cutaway does not have any power, causing your Curt Spectrum Trailer Brake Controller # C51170 to not work I recommend double checking that fuse 41 is installed. It is a 30 amp fuse that powers the trailer brake controller, and is located in the engine compartment fuse box. Since your motorhome did not come with a factory integrated controller it is possible the fuse was left out. I included a video of the # C51170
    view full answer...

  • Recommended Brake Controller For A 2022 Jeep WK Grand Cherokee
  • When it comes to installing a trailer brake controller on your 2022 Jeep WK Grand Cherokee when towing your 2018 Jayco 31UL I recommend The Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional # 90195 and The Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers # TK93VR. The Tekonsha proportional brake controller automatically levels when mounted within a 360-degree vertical range. It includes a customizable LCD display, and has up to 5 storable settings,
    view full answer...

  • Troubleshooting the Curt Spectrum Brake Controller
  • It sounds like you are not getting enough power to your Curt Spectrum Trailer Brake Controller item # C51170. You will want to take a multi-meter like the Item # PT29ZR and ensure you are getting power to your controller. You should be getting 12 volts on the black power wire and when you hit the manual over ride you will get 12v on the blue brake controller wire. If you aren't getting full power you will have a loose connection somewhere and you will want to start at your fuse and work
    view full answer...

  • Which Adapter for Curt Spectrum Brake Controller Installation on 2014 Chevy Silverado
  • It sounds like you're looking for the correct adapter plug that would allow you to use the Curt Spectrum Brake Controller # C51170, which can be found with part # C51451. This will plug into the port under the dash and connect to the Spectrum; I've linked an installation video of this controller for you to check out to see how the process works.
    view full answer...

  • Does 2000 Ford Explorer Have Brake Controller Install Port Under Dash
  • A 2000 Ford Explorer did not come with factory brake controller wiring under the dash so you'd have to hardwire the Curt Spectrum part # C51170 that you referenced. To do that you'd need the # ETBC7 which comes with everything needed to make the conversion from 4-way to 7-way and also includes everything needed to wire up the brake controller.
    view full answer...

  • Can I Install a Brake Controller in a 2015 Fleetwood Providence 42P?
  • Yes, you can definitely install the Curt Spectrum Trailer Brake Controller item # C51170 in your 2015 Fleetwood Providence 42P. The question is whether or not you can use the Curt Custom Plug and Play Adapter item # C51322 to have an easy installation or use the Curt Universal Wiring Adapter item # C51515 to hardwire it in. Your Fleetwood Providence is built on a Ford F-53 chassis. If you have it, the brake controller port is located on the left hand side of one of the steering column
    view full answer...

  • Is Curt Spectrum Trailer Brake Controller A Good Option For 2020 Chevy Silverado 1500
  • The Curt Spectrum Trailer Brake Controller part # C51170 and the custom wiring adapter part # C51525 is a great option for the 2020 Chevy Silverado 1500 because of its simple out of the way installation. The knob can be installed in any easy to reach location at any orientation. The main unit installs out of the way and utilizes the custom adapter plug for your truck to plug into the factory port. I have attached the measurements of both the main unit and the knob for you to get an idea
    view full answer...

  • Which Connector Is Needed To Install Curt Spectrum Trailer Brake Controller On a 2018 VW Atlas?
  • Both the kits come with the same Curt Spectrum Trailer Brake Controller # C51170 for your 2018 Volkswagen Atlas. The Universal Wiring Adapter # C51515 is needed if your Atlas does not have the factory brake controller wiring. While the Curt Custom Wiring Adapter # C51522 is designed to plug into the factory trailer wiring connector. If you have the factory connector with a factory 7-way the connector should be behind the left kick panel in the drivers compartment. If you do not have a
    view full answer...

  • Finding the Brake Signal Wire During Installation of the Curt Spectrum on my 2020 Hyndai Santa Fe
  • To get that Curt Spectrum part # C51170 installed your best bet is to use a test light like the Circuit Tester part # PTW2992 to determine which wire has power when the brake pedal is pushed. With such thin wires I recommend using a straight pin into the plug area where the wires go so you do not damage the thin wiring. Once it is determined this you can use the Heat Shrink Connector part # DW05743-5 to make your splice.
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  • Will The Curt Spectrum Trailer Brake Controller C51170 Fit On a 2023 GMC Sierra 1500?
  • Yes, the Curt Spectrum Trailer Brake Controller # C51170 will work on your 2023 GMC Sierra 1500. You will need the Curt Custom Wiring Adapter # C51525 to connect to the factory connecter under the dash on your Sierra.
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  • Do Curt Spectrum and TriFlex Brake Controllers Use Same Adapter for 2018 Chevy Silverado 1500
  • Thank you for your purchase of the Curt Spectrum Trailer Brake Controller # C51170 for your 2018 Chevy Silverado 1500. And I can tell you that both the Spectrum and Curt TriFlex # C24VV use the same wiring adapter for your Chevy, the Curt Custom Wiring Adapter for Trailer Brake Controllers # C51451. So assuming that's what you already have then you will not need a new one.
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  • Installing a Trailer Brake Controller On a 2011 Chevrolet Silverado 1500
  • For your 2011 Chevrolet Silverado 1500 there is not a pigtail adapter as the wiring does not have a connector. The 4 wires are terminated without a connector and coiled up behind the OBD2 port on your Silverado. I have linked a video showing where the wiring is and how to install a Tekonsha Prodigy P3 Trailer Brake Controller # 90195 below. You will need a M6 Hex Flange Nut # 185916 and M8 Hex Flange Nut # 185917 to attach the power wires in the engine compartment to the studs in the
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  • Parts Needed to Install Curt Spectrum in 2018 Nissan Frontier Using Factory Wiring
  • You'd just need to unplug your current brake controller install harness and plug in the part # C51382 instead and then plug in the Curt Spectrum part # C51170 into that and you'd be totally set.
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  • Electric Trailer Brake Controller and Wiring Harness for 2015 Toyota Tacoma
  • To use the Curt Spectrum Trailer Brake Controller # C51170 on your 2015 Toyota Tacoma, you will want the Curt Custom Wiring Adapter # C51362. It sounds like you may have a pigtail harness with exposed wires on one end and this adapter plug for under your dash on the other. If that is the case you may use that, but you will need to then use butt connectors and cut the quick connect end of your brake controller. I've attached a couple videos to assist.
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  • Wiring Harness for Curt Spectrum Trailer Brake Controller on 2016 Jeep Wrangler Unlimited
  • The correct adapter for the Curt Spectrum # C51170 trailer brake controller on your 2016 Jeep Wrangler Unlimited is Wiring Adapter for Curt Trailer Brake Controllers # C51515. One end of this adapter will plug into your Spectrum brake controller and the other end will splice into your Jeep's brake controller wiring; you can use Butt Connectors # 05731-5 to help make this connection. I have added a link to a video review of Adapter # C51515 for you to check out as well.
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  • Curt Brake Controller Plug for a 2020 Ford Explorer
  • Yes, the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51322 will allow you to use a Curt brake controller like the Curt Spectrum Trailer Brake Controller part # C51170 on a 2020 Ford Explorer (All Models). I checked with Curt just to confirm that the Curt Custom Wiring Adapter for Trailer Brake Controllers is indeed correct for a 2020 Ford Explorer so you can be confident this is the correct harness. The plug will be located under the driver dash, near the center
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  • Parts Needed To Install Curt Spectrum Trailer Brake Controller C51170 In 2014 Nissan Armada
  • The Curt Spectrum Trailer Brake Controller # C51170 will indeed work with your 2014 Nissan Armada, but I can find no reference of the S0654X-RAIS you mentioned. To install the # C51170 in your Armada you will need the Curt Plug In Wiring Adapter # C51382 which will plug into the factory trailer brake controller located underneath the dash of your vehicle. This will take care of all of the wiring for the controller and makes for a very easy, straight forward install. If your Armada
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  • Can Curt Spectrum Trailer Brake Controller Be Installed In 2014 Tiffin Allegro?
  • The Curt Spectrum Trailer Brake Controller # C51170 will work perfectly in your 2014 Tiffin Allegro, and to complete the installation you will just need the Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In # C51322 which will plug into the factory trailer brake controller port underneath the dash of your Motorhome. This will be a perfect, low-profile option to control the trailer brakes on your 18' trailer that you are using to tow your Jeep. I included videos
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  • Can Trailer Brake Controller be Used on Harley Davidson Motorcycle Pulling Small Trailer
  • The Curt Spectrum Trailer Brake Controller # C51170 can be absolutely be used with your Harley pulling a small trailer for your pups (and in the process making your wife happy). Normally with a motorcycle you want to use a time-delayed controller but since the Spectrum's main unit can be mounted at any angle, this is one of the proportional controllers that can be used so long as you can find a good mounting point for both the main unit and the control knob. To install the Curt Spectrum
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  • Curt Trailer Brake Controller Wiring Harness for a 2013 Ram 1500
  • Yes, if you are using a Curt brand brake controller then harness # C51453 is the correct one for your 2013 Ram 1500. I have included a link to the installation instructions for you to view. If you have a different brand brake controller let me know what it is and I can recommend the proper harness.
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  • Trailer Brake Controller Applies Trailer Brakes when Headlights on 2013 Dodge Ram are Turned On
  • The 2013 Dodge Ram has a unique wiring situation that requires a special wiring harness in order for the brake controller to work properly. For Curt that harness is # C51453. If you are not using the correct harness, then you would not be getting the proper brake signal when you step on the brake pedal. It sounds like the input wire to the brake controller or the output wire to the trailer brakes is somehow attached to an illumination circuit which will not work.
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  • Troubleshooting Brake Controller Install that Only Works with Override Lever on Ram 1500
  • When a brake controller does not work with the brake pedal but works with the manual override lever that means that there's an issue with the stoplight circuit (red wire) of the controller as this is the circuit that's needed to tell the controller that you are stopping the trailer. Typically on vehicles like your 2014 Ram 1500 that have brake controller pre-wiring and an install harness like part # C51453 is used this issue indicates that the problem is the brake light circuit on the
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  • Adding a 7-Way and Trailer Brake Controller to a 2017 Subaru Outback with Factory Trailer Connector
  • You can add a brake controller to your 2017 Subaru Outback but there isn't a plug-in harness to do so. To activate the trailer brakes your Outback and trailer will need to have 7-Way trailer connectors. On the vehicle side you are only doing some hardwiring and you will use the existing 4-Way connector on the vehicle to do some of the installation. What you will need on the vehicle side is installation kit # ETBC7 and a brake controller. I recommend the P2 # 90885 because it is easy
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  • Trailer Brakes Lock Up No matter What Setting is On the Brake Controller in a 2014 Ram
  • Usually when electric trailer brakes lock up it is because the brake pin on the trailer side connector is getting constant power. If you are using a 6-Way trailer connector or a 7-Way to 6-Way adapter then the likely cause is that the 12 volt circuit and the brake output circuit are switched. This switch happens because there are 2 ways a 6-Way can be pinned out. The center pin will either be 12 volt power or electric brake output. If you are using a 6-Way or adapter for a 6-Way all
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  • Installing Brake Controller in 2014 Ram 2500 in Place of Factory Brake Controller
  • Installing a brake controller in place of the factory controller in your 2014 Ram 2500 really depends on the controller you want to install. For example, if you use the fantastic Curt Echo Mobile Trailer Brake Controller # C51180 you only need to plug it into your 7-way and you're done - the controller is ready to use and your factory controller will no longer be responsive. All you need with the Echo is a smartphone; just download its app to set up the brake controller and that's it. Otherwise,
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  • Brake Controller and Install Harness Recommendation for a 2014 Ram 1500
  • The Curt Plug-In Wiring Adapter # C51453 that you referenced would be the correct harness for your 2013 Dodge Ram 1500 and would work with the Curt Brake Controller # C24VV. When installed correctly there should be no fault codes on your dashboard and you should not have to worry about having anything reflashed. No diodes would be necessary either, all you would need is the # C51453 harness and the controller and you would be good. I attached an install video for you to check out
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  • Brake Controller Wiring Harness for Curt Brake Controller and 2014 Ram 1500
  • There is a special brake controller wiring harness required by the 2014 Ram 1500. It plugs into 2 places instead of just one like other trucks. It isn't a diode issue just an issue that where a controller plugs in the proper signal needed by the brake controller isn't present. So manufacturers determine where that signal can be obtained and developed new harnesses that plug in at 2 locations. For the Curt Reflex you would need wiring harness # C51453 for your 2014 Ram. I have linked
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  • Needing the Brake Controller Wiring Harness for the Curt Venture Controller on a 2017 Ram 1500
  • On your 2017 Ram 1500, the Curt Venture Brake Controller, # C74VV, will need to use # C51458 brake control harness to install on this truck. The harness will pug in to the brake controller's harness and the other end will connect to your Ram's wiring. The wiring harness # C51453 that you referenced was used up to the 2014 Ram 1500 and is not needed on the 2015-2017 model Rams.
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Info for these parts were:

Employee Lindsey S
Written by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
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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