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  1. Trailer Brake Controller
  2. Ram
  3. 1500 Classic
  4. 2020
  5. CURT
FITS 2020 Ram 1500 Classic
Curt Spectrum Brake Controller w/ Custom Harness - Dash Mounted Knob - Up to 4 Axles - Proportional
CURT

Curt Spectrum Brake Controller w/ Custom Harness - Dash Mounted Knob - Up to 4 Axles - Proportional

Part Number: C93SV
In Stock
$251.96
Trailer Brake Controller
Confirmed to Fit
2020 Ram 1500 Classic

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Call etrailer.com at 1-800-940-8924 for expert service. We are your Ram trailer brake controller experts, and offer a great price. etrailer.com carries a complete line of CURT products for your Ram 1500 Classic 2020. Curt Spectrum Brake Controller w/ Custom Harness - Dash Mounted Knob - Up to 4 Axles - Proportional part C93SV from CURT can be ordered online at etrailer.com. Complete trailer brake controller installation instructions and technical support.
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CURT Trailer Brake Controller - C93SV

  • Electric
  • Electric over Hydraulic
  • Proportional Controller
  • Up to 4 Axles
  • CURT
  • Behind-Dash
  • Dash-Mounted Knob
  • Plug-In
  • Indicator Lights
  • Multiple Trailers

You can stick the control knob to the dashboard, plug in the module, and your brake controller installation is done with no drilling and no hardwiring. The knob is large and easy to use, while the main unit is out of sight behind the dash.


Features:

  • Proportional braking - Smooth, safe, and good for your brakes long-term
  • Fingertip control
    • Adjust braking output and sensitivity by turning the dial
    • Push the button to activate manual override
    • Troubleshoot with colored LED indicators
  • No-drill installation - Knob adheres to dash, main unit installs behind it
  • Plug-and-play - Custom-fit wiring harness
  • Assembled in the USA


Specs:

  • Application: trailers with 1 to 4 axles (8 brake assemblies)
    • Compatible with electric or electric-over-hydraulic trailer brakes
    • Compatible with ABS brakes, cruise control, low-voltage wiring, multiplex wiring, and PWM systems
  • 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'
  • Warranty:
    • Limited lifetime on brake controller
    • Limited 1-year on wiring harness


How Does the Curt Spectrum Work?

The Spectrum puts control of your trailer's brakes at your fingertips and, with bright LED indicators, you know what your brake controller is doing at a glance.


Curt Spectrum Dash-Mounted Knob

You can adjust all of your settings using the control knob. 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 go as high as you can without the trailer brakes locking up.


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 manual override activates just the brakes of your trailer, great for stopping sway or controlling its momentum in an emergency. To engage the manual override, press and hold the button on the control knob.


Curt Spectrum review

No-Drill Installation

The Curt Spectrum 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 banging 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. The knob sits flush against the dash, so you don't have to worry about finding enough clearance behind the dash. You can use either the included screw to mount the knob, or the adhesive pad for a drill-free installation.


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.


The included custom-fit adapter plugs into the port on your vehicle's built-in brake control wiring harness, which you'll find underneath the dashboard, to the right of your steering wheel. Once you're plugged into the factory port, just plug the other end of the adapter into the main unit. No hardwiring needed!


Note: If you don't already have a 7-way plug at the back of your vehicle, take a look at our exclusive 7- and 4-way brake controller installation kit (ETBC7 - sold separately).


What is Proportional Braking?

What is proportional Braking

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


The 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

51458 Curt Quick Plug Brake Control Adaptor Harness

Replaces 51439

Installation Details C93SV Installation instructionsAlternate Instructions C93SV Installation instructions

California residents: click here


Video of Curt Spectrum Brake Controller w/ Custom Harness - Dash Mounted Knob - Up to 4 Axles - Proportional

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




Video Transcript for Installation: Curt Spectrum Brake Controller w/ Custom Harness on a 2020 Chevrolet Colorado

Ryan: How's it going Ryan here at etrailer.com. Today on our 2020 Chevrolet Colorado, we're going to be taking a look at and showing you how to install the Curt Spectrum Trailer Brake Controller. The main thing that really separates this brake controller from many of the traditional style brake controllers like this is a couple of things. One, it's going to be really small and two, you're going to be able to pretty much mount this anywhere that you want and on a lot of today's newer modern vehicles, that dash space is really limited and can be really challenging to find a good spot to mount a brake controller like this that's out of the way, but yet still easy to use.There are other brake controllers that are similar in the design of this one and most of our customers specifically compare this one to the Redarc. I personally like this one a little bit better than the Redarc and that's because behind our knob here, there's going to be nothing behind it as compared to the Redarc, behind the knob, there's going to be a connector that comes out quite a ways. So, you're still somewhat limited on where you can mount that Redarc because you're going to have to have room behind the panel for that connector to fit.

And if you choose not to, this one doesn't require any drilling or anything like that. In our case, where we mounted it, we did drill one small hole to run our wire through. But if we chose to mount this a little further down or if you want to see a wire coming, all you'd have to do is stick this to the dash.Another thing that makes this really easy to use is the fact that it has automatic leveling, so what that means as soon as you plug into a trailer, this is going to automatically calibrate. You're not going to have to scroll through settings or go through the menu and select which trailer that you want. It's just going to do it for you.

The brake controller is going to work with trailers for up to one to four axles and it's also going to be proportional. What proportional means is the trailer brakes are going to apply at the same rate as how hard you apply the brakes inside the truck. That's just going to provide us with a smooth and predictable stop.The knob is going to have multiple modes as well as indicators that'll let us make some changes and let us know what's going on. For example, whenever you hook up to your trailer, it'll flash green letting us know that the connection has been made. Once it's done flashing green, that also lets us know that it's been calibrated.

Then whenever we disconnect from our trailer, it'll flash blue letting us know that we're unplugged. We're also going to have a few different settings. If we turn our knob, you'll see the LEDs go green to orange to red, and that's going to be the output control. And what that does is determine the maximum amount of power that's going to be available to the trailer brakes whenever we're braking. If you push the button down and hold it, that's going to be the manual override.

So, if you want to apply the trailer brakes manually, say in the event of a sway situation, you'd simply hold that down.That can be adjusted by holding it down and turning the knob and that'll control how hard the brakes will be applied. If you push the button again, we will get some blue lights that turn to purple and then red. That's going to be able to control the sensitivity and that's going to adjust how aggressive the trailer brakes are applied. If you push it again, it'll then be white. What that's going to do is to allow you to adjust the brightness. Here it's on full power, you'd probably use this setting whenever it's sunny outside that way you can see a little bit better, and then at nighttime you could always turn it down if that light's bothering you.So overall, a really simple, easy-to-use brake controller. It allows us just to hook up to our trailer and more or less be ready to hit the road since it automatically adjusts, but it's still going to give you that capability to fine tune it a little bit if you want to. And since it is so compact, it's going to help keep that nice, clean, factory look inside of our truck. We're not going to have to worry about the traditional style one that's big and bulky, taking up space, banging our knee on it. As far as the installation goes, it's just going to be a handful of wires that we have to hook up and it's really straightforward. You should have no problem doing it at home in the driveway or even your garage. Speaking of which, let's go ahead and put this on together now.Let's begin our installation. We're going to need to first locate our factory brake controller wiring. We're over here on the driver's side, in the front seat, and the brake controller wiring should be right here in this location, underneath this little threshold. We'll go ahead and pop that off and to do that what you can do is grab the end of it here and just pull it up. Just work it up and it'll pop off and we can just set it off to the side. If we follow some wiring up right here. With that panel out of the way, now we can see our factory brake controller wires. They're going to be just right here by our emergency brake pedal. There's going to be four of them. They're going to have some heat shrink on the end. They're also going to be taped to this thicker wiring harness. What I'm going to do is just cut that tape off.We're able to pull the wires further out to give us a little more room to work. Something I do just want to point out, if your truck doesn't have these factory brake controller wires, you are going to need to pick up an ETBC7 to get your install completed. However, chances are pretty good yours will have these as most of them on the road, at least in my experience, do. I went ahead and tested our wires here to make sure we know how each one functions. The black wire, that's going to be the ground. The red wire, it's going to have a little green stripe on it, that's actually going to be our 12 volt power. The blue wire, that's going to be the output, the brake controller. And then the white wire that has a thin blue stripe on it, that's going to be our brake signal. Now what we can do is cut this heat shrink off and get these prepared, that way we're able to hook up our adapter. I'm just going to trim off that heat shrink with a pair of snips.Then we can come back with a pair of wire strippers to strip off some of this insulation to expose the wiring underneath. Now what I'm going to do is take some heat shrink butt connectors, which you can find here at etrailer.com, and I'm going to crimp one of these on each end of our wire here. Twist them, slide that butt connector on, and crimp it down. I'm going to repeat that same process for the three remaining wires. Now what we're going to do is take our wiring adapter for Curt brake controllers and get these wires hooked up to the factory ones. You might think, naturally, that you would just hook these up color for color, but that's actually not the case. So, we'll run through which color goes to which wire right now.We will start with the blue one from our Curt adapter. That's going to go to the factory blue one, so those will actually match up. We'll grab the white one from our Curt adapter and that's going to connect to the factory black wire, so those two will go together. Then grab the black wire from our Curt connector and that's going to get connected to the factory red wire. And then we'll grab the red wire from our Curt adapter and that's going to get connected to the factory white and blue wire. These are going to get connected the same way that we put these butt connectors on. We'll just slide the wire in and crimp it down. I'll do that same thing to get our remaining wires all hooked up. Here's what our wiring is going to look like once we have it connected. Since I used heat shrink butt connectors, what I'm going to do is come in with a heat gun and shrink those ends.At this point, we need to figure out where we want to mount our knob. You want this out of the way, yet easy to see and easy to get to. A spot that I think is good is right here to the right of the steering wheel, on this panel. I'm thinking somewhere in this location. We are going to have to drill a small hole, that way we're able to run our wire through the dash and get it all connected. But before I just start drilling, it's a good idea to see what's behind this panel that way we don't accidentally drill into something of importance, so I'm going to lower this panel down to check that and on the bottom edge there's going to be two 7mm screws that's holding it in place. Once you have the screws out, what you can do is grab that panel and work it out.With it pulled back, there's nothing on the backside of the panel and there's really nothing in the way here that we have to worry about. There's also going to be a gap here that I think would work pretty good to run our wires through. I went ahead and marked the spot where we need to drill out a small hole, so I'm using a bit just a little bit bigger than the wire, that way we won't have any problem getting it pushed through. Once our hole is drilled, since we're using the adhesive to connect our knob to the dash, it's a good idea to really make sure this is nice and clean, that way it'll stick really well. I'm just going to use a little bit of rubbing alcohol to get that area really clean and nice and dry. Now we can take the wires here at the end of our control knob, we're going to feed those through the hole that we drilled.What I'm going to do before we actually mount our knob, is run these wires down by our brake controller adapter harness, down along through the dash here, and I'll do that and show you the path that I took to get there. Here's how I ran the wire. It comes out of the back of the knob and through this little opening here behind our panel and if you push it through there, that'll actually allow it to start to drop down here underneath the dashboard. Here's where our wiring comes down underneath the dash and I ran it along, ending right here where it'll be nice and easy to get everything hooked up. For the time being, we're not going to worry about completely securing our knob just yet, what we're going to focus on doing now is hooking up these wire ends to our plug connector. The way you're going to do this is take the wire and simply push them into those corresponding slots to get them all hooked up.The one that we're going to do first is this white wire and that's going to go into slot two, so more or less we're not going to be using the very end slots on each side. We'll take the white wire and push it all the way in and then just lightly pull back on it to make sure it's completely seated. There's going to be a little bit of movement, but that's not really a big deal. The next one after the white wire will be the green wire. Again, these are all going to work the same way. They are a little small, so you have to finesse it a little bit, get that plugged in. Now moving on from the green wire in that same direction that we're going, we're then going to plug in the brown wire. After that, the blue wire. Following that, will be the black wire and after the black one we'll plug in that red wire.This is what the wires are going to look like once they're all plugged into our connector and once we have them all plugged in, we can just flip it over and take this cap and close it down like that. Now we're going to grab our main module here and get this plugged in, that way we can figure out a spot to mount it. One end of it will simply plug into our wiring adapter. The other end we'll plug in our wiring that comes from our knob. At this point, you can look underneath the dash or somewhere out of the way that we're able to secure our module box. Here's where I mounted our module box and I did that using the included two-sided tape as well as a zip tie. From there, I just took all of our extra wiring that we had and tucked it off to the side and secured it to help clean up our install look. At this point, we can go ahead and resecure our dash panel and then we can go ahead and put back in place our threshold here.The weather stripping is supposed to go over the threshold, so you might have to work it up with your fingers. At this point, we can secure our knob to the dashboard, so we'll take the included two-sided sticky tape, pull one side back, put it in the center there, make sure it's pushed down, peel that other side off, and simply we'll just line it up how we want it, nice and straight, then push down to get it stuck to the dashboard.With everything hooked up, it's a good idea to test it to make sure it's working properly. You could either just hook up to your trailer or use a tester box like we have here today. Once you do plug it into your trailer, what you should see is some green lights that ramp up, and that'll indicate to us that the brake controller is calibrating itself to your trailer. Just to verify that this is sending a brake signal back to our trailer, what I'll do is manually override it and apply the brakes. To do that, we'll simply just push down and hold the center button. You can see it lighting up. We now have power to our brakes. That'll finish up our look at and our installation of the Curt Spectrum Trailer Brake Controller on our 2020 Chevrolet Colorado.

Ratings & Reviews

4.6

380 reviews
You can stick the control knob to the dashboard, plug in the module, and your brake controller installation is done with no drilling and no hardwiring. The knob is large and easy to use, while the main unit is out of sight behind the dash.

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Martha was excellent to work with!



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A wonderful customer experience. Worked with professionals who guided me in selecting the correct product. Thank You!



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Brittany was professional and patient not to mention helpful.



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Excellent service



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Great shopping experience and quick del ivery.



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Only ised a short time and it worked as advertised.



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Small form factor works great



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Installation was easy, really liked the tape option to try out different placements before drilling for a permanent mount.



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Extremely easy to install. Works great!



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Install was a breeze because of the vehicle specific pigtail, etrailer's customer service is excellent and the information on installation helped me locate my plug



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They were very helpful on the phone to make sure i purchased the correct setup for my truck. I received it that week and installed it over the weekend. So far it is out performing the previous brake that was installed.



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This was plug and play very easy to install. Anyone can do it.



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Installation was very easy, this controller is the smoothest brake controller I've ever used. Brake applications are seamless, you can't even feel them. Extremely good choice, and I've had some really high dollar controllers in the past.


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See what our Experts say about this CURT Trailer Brake Controller

  • Troubleshooting Curt Spectrum Brake Controller - No Lights On Control Knob
    The Curt Spectrum Brake Controller # C51170 should illuminate, even if the trailer is not connected. If you are getting no lights at all, this likely means the control unit is mis wired, or there is contamination in the trailer plug socket. We recommend double checking your wiring and making sure everything is done correctly. Also clean and dry your trailer plug. I have included Curts troubleshooting guide below.
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  • Troubleshooting Installation of Curt Spectrum Brake Controller on 2011 Toyota Sienna
    The calibration process of the Curt Spectrum # C51170 should only happen after initial installation and should be run before you plug in the trailer to your tow vehicle. You should have seen the green lights on the knob light up in a clockwise motion 7 times, which indicates the calibration is occurring. If you've gone through this process and the error occurred, then the lights on the knob can tell you a bit about what's potentially going on. If you're seeing all red lights that would...
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  • Troubleshooting Curt Spectrum Output and Sensitivity Adjustment
    It sounds like the sensitivity needs to be adjusted on your Curt Spectrum # C51170 since it is too aggressive leading to the jumpy stop. To adjust the output and sensitivity you want to follow the instructions. This means you only make adjustments while stopped, with the transmission in park or neutral, parking brake applied, foot off the brake pedal, and no manual control actuation. Adjust the sensitivity by pressing the rotary knob until the brake control is in the sensitivity control...
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  • How Does Brake Controller Unplug from Vehicle to Prevent Battery Draw
    Hey Joe, while I don't know what brake controller you have you should be able to unplug it from the back of the brake controller and that would accomplish what you are wanting. What brake controller do you have?
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  • What Lights On Curt Spectrum Are Supposed to Activate When Pressing Brake Pedal and No Trailer?
    I have added a link near the bottom of this page with the instructions for the Curt Spectrum Trailer Brake Controller # C51170. When not connected to a trailer and pressing on the brakes you should see 2 blue lights flash on each side of the control knob. If you can tell me what you are seeing I can help you to determine what fault you may be having.
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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 console...
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  • Does Curt TriFlex Plug Into 2007 Chevy TrailBlazer
    Even if your 2007 Chevy TrailBlazer has a factory 7-way there is not a plug underneath the dash for a trailer brake controller such as the Curt Spectrum # C51170; you will need to hardwire it with Wiring Adapter # C51515 though the wires will already be run if you have the factory 7-way (you should already have a factory 4-way). If you do not have the factory 7-way you will need to add the Universal Installation Kit for Trailer Brake Controllers # ETBC7. I've added a link on installation...
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  • Recommended Brake Controller for a 2018 Thor Ace Motorhome
    For your 2018 Thor Ace Motorhome, I recommend using the Curt Spectrum Trailer Brake Controller part # C51170. The reason for this is because this unit is composed of two main parts, the control box and the output knob. The control box gets mounted out of site and then the output knob will get installed up on your dash for easy use and a very aesthetically pleasing look. The color output of the knob also helps with ease of use. Since your motorhome is on a Ford F-53 chassis, you can use...
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  • Comparing the Curt Spectrum Brake Controller to Redarc Tow-Pro Elite
    By all accounts the Curt Spectrum Trailer Brake Controller # C51170 works well and is easy to use and install on most vehicles. It is a brand new item so not a lot of feedback has come in on it. I did learn a few things though after speaking with our install team about this controller. First, compared to the Redarc controller # RED44FR, the Curt Spectrum is easier to install. It can be surface mounted meaning that drilling is not necessarily required (depends on how you run the wiring)....
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  • Recommended Brake Controller for 2018 Nissan Titan With Factory 7-Way
    For your 2018 Nissan Titan I very strongly recommend going with the Redarc Tow-Pro Elite item # RED44FR over the Curt Spectrum item # C51170, which does use Wiring Adapter item # C51382 to connect to your 2018 Nissan Titan. The Redarc Tow-Pro item # RED44FR, which you can install in your '18 Titan with Wiring Adapter item # 3050-S, is by far the superior option because it is not only extremely effective and responsive but its manual control knob makes it simple to use; the Tow-Pro can...
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  • Is 3.6V on 2020 Jeep Wrangler Unlimited Trailer Plug Abnormal
    If it's just a 4-Way Flat connector like the T-On # 118786 then I would be surprised to see that much power being pulled to the back of your 2020 Jeep Wrangler Unlimited, but if you have a 7-Way like what we find with the Wiring Kit # ETBC7 then 3.6V on the 12V power pin isn't out of the ordinary and you'll be fine. Attached are photos showing the functions per pin on both a 4-Way and a 7-Way connector for you to reference.
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  • What Should Display of Curt Spectrum Show When Not Connected to Trailer
    Hey Paul, with the Curt Spectrum part # C51170 you should have blue lights on the sides of the display flashing when a trailer isn't connected and then the same lights go solid when the brakes are applied.
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  • Easy to Install Brake Controller Recommendation for 2009 Ford F-750
    I have a really easy to use Curt brake controller solution for your 2009 Ford F-750 but we don't have any plug and play solutions like you are wanting. Instead though we have the Curt Echo Mobile part # C51180 which basically just plugs into an active 7-way and once synced to a smart phone is ready to tow. It's also a proportional brake controller which means it senses how hard you are applying the vehicle brakes and applies a proportional amount of braking pressure.
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  • Recommended Plug and Play Brake Controller Adapter for a 2022 Nissan Pathfinder
    No, I am sorry we do not because Tekonsha did not make one for your 2022 Nissan Pathfinder. The Prodigy P3 Brake Controller item # 90195 includes a universal harness you can use but you'll need to cut and splice wires. Curt does have a plug in play adapter but it only works with their brake controllers. It is the Curt Custom Wiring Adapter for Trailer Brake Controllers item # C51382. It will allow you to easily install the Curt Spectrum Trailer Brake Controller item # C51170.
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  • Curt Spectrum - What Do Two Flashing Blue Lights Mean?
    Hello Trent, thanks for getting in touch. The two blue lights on the Curt Spectrum # C51170 knob mean the trailer is disconnected. The lights should flash blue when the trailer is disconnected or they will be steady blue with the brakes are pressed with no trailer connected. The green lights when towing are also normal. The knob will show green/red depending on your braking power setting. I have included the list of the LED color patterns for the knob below. If there is an issue you are...
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  • Where is The Connector For Installing a Trailer Brake Controller Located On a 2023 Hyundai Santa Fe?
    The location of the connector for connecting the Curt Wiring Adapter # C77BR on your 2023 Hyundai Santa Fe is under the dash to the left of the steering column. The 4-pin connector is cream colored and should be exposed. Be sure to look and feel around the wiring harness as the connector could be on top of the wiring where it is difficult to see. I recommend using the Curt Spectrum Trailer Brake Controller # C51170 as it will allow you to locate the control knob where it is most convenient.
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  • What Colors Will Curt Spectrum Brake Controller Light Up with Brake Pedal Pressed
    The Curt Spectrum # C51170 will light up from green to red (with the trailer connected) depending on what power setting you chose. This will be the case whether you are parked or heading down the road. I confirmed this with my contact at Curt. I've also attached a photo showing what the display will look like as well as a review video you can check out.
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  • Troubleshooting a Curt Spectrum That Does not Go Through Calibration Sequence
    There could be a couple of reasons why your Curt Spectrum # C51170 is not calibrating, but it's likely due to your wiring. Even though you're using a plug in adapter # C51523, there still can be an issue with your vehicle wiring. I recommend physically checking your grounds, to make sure that it's to a clean secure surface. If your grounds are good, then check the white and black wires on the main module and make sure they're not flipped; If they are flip them and check again. I also...
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  • Single Red LED Lights Up When Brakes Pressed on Curt Spectrum Trailer Brake Controller
    What you have is in fact the Curt Spectrum Trailer Brake Controller # C51170. The single red light means it is working properly. More lights will light up as more brake power is asserted. This all depends on the settings of the brake controller. If you haven't changed any settings yet I recommend starting on page 11 of the manual to get it properly setup and adjusted. I have attached the link to the instructions below.
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  • Troubleshooting Red Light On Curt Spectrum With Trailer Brakes Not Working On a 2014 Toyota Tacoma
    The first place I would start is with the Curt Custom Wiring Adapter # C51362 that you have connected between the Curt Spectrum Trailer Brake Controller # C51170 and your 2014 Toyota Tacoma. The red light that you are getting when the brakes are pressed indicates that the red wire that connects to the brake switch is either connected to the ground side of the switch or there is a short to ground. I do believe that you have a ground wire issue. The Tekonsha Plug-In Wiring Adapter 3040-P...
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  • Is Curt Spectrum Compatible With Demco Stay-IN-Play Duo Braking System
    The Demco Stay-IN-Play Duo Braking System # DM86VR is a standalone system so no brake controller is required. The same is true for our other supplemental braking systems for flat towing. The Stay-IN-Play senses the rate of your RV's deceleration and triggers your towed car's brakes to slow down at the same rate just like a proportional brake controller. The Curt Spectrum # C51170 is only designed to work with trailer brakes.
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  • Comparing Redarc Liberty and Curt Spectrum Brake Controllers For a 2023 GMC Sierra 1500
    Personally, I have seen a lot fewer issues with the Redarc Tow-Pro Liberty # RED24FR than with the Curt Spectrum # C51170. The Spectrum was released in early 2018. Currently Redarc only offers the one size control knob. To install the Redarc Liberty # RED24FR in your 2023 GMC Sierra 1500 you will need the Tekonsha Pigtail # 3064-P and the Redarc to Tekonsha Adapter # 331-TPH-017. This will support up to 2 braking axles or 4 brake assemblies. If you go with the Curt Spectrum # C51170...
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  • Parts Needed to Add 7-Way to 2012 Mercedes Sprinter For Brake Controller
    You are 100 percent correct with what you need to add a brake controller to your 2012 Mercedes-Benz Sprinter with the 4-way and then 7-way: - T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118650 - Universal Installation Kit for Trailer Brake Controller # ETBC7 You will first install the 4-flat, which will activate your trailer's lighting functions, and you'll then plug that into the 7-way that comes with the # ETBC7, which also gives you the wiring, circuit breakers,...
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  • Recommended Trailer Brake Controller For a 2023 Hyundai Santa Fe w/ Factory Tow Package
    I recommend the Curt Spectrum Trailer Brake Controller # C51170 for your 2023 Hyundai Santa Fe. This will plug and play with your factory wiring using the Adapter # C77BR. The small control knob allows you to position it on your dash where it is most convenient. This is much better than having a large dash mounted control box which often gets in the way.
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  • Brake Controller with Plug-In Adapter for 2020 Ram 1500 With Tow Package
    There are absolutely plug-in wiring adapters for a brake controller for your 2020 Ram 1500, and what you can use is the Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In # C51458 Then for a brake controller that doesn't take up a lot of space use the Curt TriFlex NEXT Trailer Brake Controller # C24VV.
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  • 2020 Dodge Ram 1500 Classic WIring Harness for Curt Trailer Brake Controller
    For your 2020 Ram 1500 Classic and Curt Venturer Brake Controller # C74VV you can simply use the wiring harness # C51458 to connect it. It will be a simple plug and play with your factory wiring connectors.
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  • Why Is Stoplight Circuit Difficult to Find on 2017 Ram 1500 For Installing Brake Controller
    Your generation of Ram truck uses a powernet style of wiring at the brake switch wiring which means the voltage will actually read lower than what a 12 volt circuit tester is going to show. Also if you are trying to hardwire a controller you are going to have issues as we've found that if you don't use a harness designed specifically for your truck's wiring setup you may damage the vehicle. So to install the Curt Discovery part # C84VV you have to use the vehicle specific install harness...
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  • Will Curt TriFlex Brake Controller Allow 2020 Ram 1500 Classic to Operate Brakes on Travel Trailer
    Yes, the Curt TriFlex Trailer Brake Controller # C24VV will work for your 2020 Ram 1500 Classic to operate the brakes on your Northtrail NBH24 travel trailer. You will need the Wiring Adapter # C51458 to plug and play the controller into your factory 7-way wiring.
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  • 2023 Ram 1500 Classic Trailer Brake Controller Recommendation
    Both the 2023 Ram 1500 and the 2023 Ram 1500 Classic use the same brake controller wiring adapter so for this circumstance you definitely can look through either fitguide, but there are other products that specific fits so I don't recommend making it a habit. Out of the available options I recommend the following: - Curt Echo Under-Dash # C27JR - Custom Wiring Adapter # C51458 With this system you'll monitor and adjust your trailer brake settings with an app on your phone but once...
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  • Recommended Trailer Brake Controller For a 2022 Ram 2500
    I recommend the Redarc Tow-Pro Elite Brake Controller # RED44FR for your 2022 Ram 2500. This will connect with the Plug and Play Wiring Harness # 331-TPH-020 to the under dash connector. I prefer this controller over the Curt Echo # C27JR with the Adapter # C51458 and factory options as it gives you more adjustability and is easily controlled with the dash mounted control knob. While the Curt is easy to install you have to control everything from your smart phone including adjusting braking...
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  • Will Curt Echo Under-Dash Brake Controller Work with Factory Tow Package on a 2022 Ram 1500 Rebel
    The Curt Echo Under-Dash Wireless Brake Controller # C27JR and Wiring Adapter # C51458 will work great on your 2022 Ram 1500 Rebel since it has the factory tow package but no factory controller! I really like this controller since it's inside the cab so you don't have to remember to grab it prior to towing, but it's also out of the way and doesn't take up any space inside the cab.
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  • Plug-In Curt Brake Controller Adapter for 2024 Ram 1500 & What Controllers Does it Fit
    For your 2024 Ram 1500, the correct Curt brake controller wiring harness is the Curt Custom Wiring Adapter for Trailer Brake Controllers # C51458. This will give you a simple plug-and-play brake controller wiring harness (keep in mind this will not work if you have the OEM brake controller), and here are the brake controllers that this adapter works with: - Curt Spectrum Trailer Brake Controller # C51170 - Curt TriFlex NEXT Trailer Brake Controller # C24VV - Curt Discovery NEXT Trailer...
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  • Wiring Needed To Install Hayes Engage 81760 Trailer Brake Controller on 2023 Ram 1500
    You will need the Curt Custom Wiring Adapter # C51458 for your 2023 Ram 1500. This will allow you to connect your Hayes Engage Trailer Brake Controller # HA81760 to the factory connector under the dash.
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  • Does 2019 Ram 1500 Need to be Flashed Using Curt Discovery Brake Controller
    Thank you for your purchase from etrailer of the Curt Discovery Brake Controller # C84VV and Wiring Adapter # C51458, we appreciate it. Your 2019 Ram 1500's computer does not need to be flashed/programmed when using this controller it will be plug and play. The exception is if you are replacing the factory brake controller, as you would then need to do so.
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  • Recommended Plug and Play Adapter for a Curt Brake Controller on a 2019 Ram 1500
    For your 2019 Ram 1500 the Curt TriFlex NEXT Trailer Brake Controller item # C24VV can be installed with a plug and play adapter using the Curt Custom Wiring Adapter item # C51458. The port you need is right above where your right foot would be covered in a foam tape. I have attached a picture below to help you find it.
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  • Recommended Brake Controller for 2022 Ram 1500 Classic and How to Install It
    I can understand your hesitation about drilling a hole in your brand new dash, I'd be a little leery of that myself. If you have a smart phone, we have the perfect solution for you. Curt recently released the Under Dash Echo wireless brake controller, part # C27JR. The control unit installs under the dash, out of sight using the # C51458 brake controller harness that plugs into the tow package connector under the dash. The connector is located to the right of the steering column, above...
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  • Is Curt TriFlex Trailer Brake Controller Compatible with a 2019 Ram 1500 New Body Style
    The Curt TriFlex Trailer Brake Controller # C24VV is a confirmed fit for your 2019 Ram 1500 New Body style. All you need is the Wiring Adapter # C51458 for a plug-in installation! I have attached the installation instructions for you to check out. I'm not sure why someone would say a traditional-style brake controller like this won't work with a vehicle (much less a pickup truck) because these types of brake controllers are very universal and usually if there isn't an adapter for it you...
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  • How to Install the Curt TriFlex Trailer Brake Controller Part # C24VV on a 2016 Ram 1500
    The Curt TriFlex Trailer Brake Controller part # C24VV coupled with the Curt Custom Wiring Adapter part # C51458 will have everything you need to install a brake controller on your 2016 Ram 1500. You will not need to take the vehicle to the dealer to install this as the process is very simple and should not take you more than 30 minutes or so. The hardest part of the whole process is finding the brake controller plug-in port on the vehicle. If you take a look at the attached installation...
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  • Tekonsha Brake Controller Adapter for 2020 Ram 1500 With Factory 7-Way
    The Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In # C51458 is absolutely compatible with your 2020 Ram 1500 with the factory 7-way.
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  • Which Curt Brake Controller Harness Fits a 2015 Ram
    Part of the problem is the harness you are using is the incorrect one. You would need the part # C51458 for your 2015 Ram 1500 and not the # C51453. The correct harness for your does not have the extra wire that you are mentioning since your truck does not require it.
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  • Wiring Harness to Install Tekonsha Brake Controller on 2022 Ram 1500
    To install a Tekonsha brake controller on your 2022 Ram 1500 you will just need the Wiring Adapter # C51458. The gray plug will connect to your vehicle under the dash and then you'll cut off the black connector and splice it (per color) to your current Tekonsha pigtail. If you plan on still using the brake controller with your old truck when you need to then you might consider picking up another mounting bracket for your Ram. For example, the Prodigy P3 # 90195 would use the mounting bracket...
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  • Does Curt Assure Trailer Brake Controller Plug Into 2019 Ram 2500
    The Curt Assure is 100 percent compatible and will work with your 2019 Ram 2500. You only need the Plug-In Wiring Adapter and you're set. This is a great choice for a brake controller because it is simple to use, has a really nice, easy-to-read display and will give you consistently smooth braking. There are no other items you need except the brake controller and harness; the exact part numbers you need are the following: - Curt Assure Trailer Brake Controller # C49UR - Curt Custom...
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  • Install Harness for 2016 Ram 1500 to Install Curt Assure Brake Controller
    To install the Curt Assure brake controller part # C49UR in your 2016 Ram 1500 all you need is the correct install harness part # C51458.
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  • Brake Controller Adapter Harness For 2022 Ram 1500 For Curt Discovery Brake Controller
    There is; I checked with Curt and verified for you the correct brake controller adapter harness for your 2022 Ram 1500 and the Curt Discovery Trailer Brake Controller # C84VV is the following: - Curt Custom Wiring Adapter for Trailer Brake Controllers # C51458
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  • Brake Controller Install Harness for Curt Brake Controller on 2022 Ram 2500
    I have confirmed that the Curt # C51458 brake controller harness is compatible with the 2022 Ram 2500, and is the correct harness you'd need to install the Curt # C27JR Echo under-dash brake controller on your truck. The connector is located under the dash, to the right of the steering column. The connector works with all Curt brand brake controllers. I've linked to a video that explains how the Echo under-dash brake controller works, as well as to a video that shows where the under dash...
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  • Where Does a Curt Venturer Brake Controller Plug In on a 2016 Ram 1500
    In order to install the Curt Venturer brake controller # C74VV on your 2016 Ram 1500 you will need wiring harness # C51458. It plugs into the factory plug on the truck located under the dash, to the right of the steering column, taped to another harness. I included a picture showing the location. the picture is from the instructions for # C51458 which I have also linked for you.
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  • Does Curt Assure Trailer Brake Controller Work With 2019 Ram 1500 Classic
    So long as your 2019 Ram 1500 Classic does NOT have the factory brake controller, then yes, you can use the Curt brake controller, and you will also need the correct wiring harness, which I've listed below for you: - Curt Assure Trailer Brake Controller with Dynamic Screen # C49UR - Curt Custom Wiring Adapter for Trailer Brake Controllers # C51458 The Assure is a superb option for a brake controller because it not only gives your trailer smooth braking proportional to that of your truck,...
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  • How To Use Curt TriFlex Trailer Brake Controller On a 2018 Ram 1500
    The Curt TriFlex Trailer Brake Controller part # C24VV is an excellent option for a 2018 Ram 1500. That said, you'd also need the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51458 for plug-in-play installation. In regards to the factory brake controller, these aftermarket options are much more reliable and offer better performance. There is really no comparison and many swap out the factory brake controller for an aftermarket brake controller.
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Amanda K
Updated by:
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Written by:
Sabrina W

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