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  1. Trailer Brake Controller
  2. CURT
  3. Electric
  4. Electric over Hydraulic
  5. Proportional Controller
  6. Up to 4 Axles
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: C93MV
In Stock
$239.95
Trailer Brake Controller

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In Use/Installed

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. Great Prices for the best trailer brake controller from CURT. Curt Spectrum Brake Controller w/ Custom Harness - Dash Mounted Knob - Up to 4 Axles - Proportional part number C93MV can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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CURT Trailer Brake Controller - C93MV

  • 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 dash, to the left of the steering column, taped to another harness near the emergency brake pedal. Once you're plugged into your 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

51332 Curt Quick Plug Brake Control Adaptor Harness

Installation Details C93MV Installation instructionsAlternate Instructions C93MV 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.

Customer Satisfaction Score:

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.
    view full answer...
  • 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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  • Troubleshooting Flashing 0.0 Error Message on Curt Discovery Brake Controller # C84VV
    The troubleshooting guide included in the instructions for the Curt Discovery Brake Controller # C84VV that you referenced does not include this particular display issue, a flashing 0.0, among the possible display messages. My technical contact at Curt has never seen this particular message displayed on a Discovery brake controller. He suggested that either the display is malfunctioning or the controller is bad. Since your brakes are not engaging when you press the pedal with the trailer...
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  • Components Needed for the Curt Venturer Brake Controller to be Used on a 2004 Dodge Ram Pickup
    If you prefer using the Curt Venturer Trailer Brake Controller, part # C74VV, then we have the adapters required to make them work. If you already have a 4-way on your 2004 Dodge Ram Pickup, then the adapter for the Venturer is part # C51332. This will plug into the Venturer and the factory brake controller port of your pickup. I've linked to a video review of this adapter for you to look at. To convert your 4-way into a 7-way, you will need the etrailer Universal Installation Brake Controller...
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  • Where is Brake Controller Adapter Plug Located In 2002 Dodge Ram Pickup
    The green connector in your truck is not the correct plug. It is normally a blue plug like what I have shown in the photo that plugs into the adapter part # C51332 if you are using a Curt brake controller like part # C51170. There will be a port to plug into if the truck came with a factory 7-way plug just to the right of the emergency brake. If the 7-way plug was installed after-market, you will need to see how far the wires from the plug are extended so you can complete the install...
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  • Do Brake Controllers have Constant Power or Do they Wire Into a Ignition/Accessory Power Source
    Brake controllers such as # C74VV will have constant power once installed. They need to have constant power otherwise they would reset every time you turned off the vehicle. Brake controllers have what is basically a sleep mode. After a certain amount of time the "go to sleep" and draw only a few milliamps of power so they will not drain the vehicle battery. If your 2007 Dodge Ram did not come with a factory 7-Way trailer connector then you will also need wiring harness # C51515 for the...
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  • Where Is the Brake Controller Plug on a 2008 Dodge Ram 1500
    The correct brake controller adapter plug you are looking for is blue however, it will only have four pins as you mentioned which means the one you have located in not correct. The correct plug you will be looking for and can find in the attached photo is located to the left of the intermediate shaft on the steering column. This plug can also be seen in the attached video. The correct adapter for you if you have a Curt brake controller like the Curt TriFlex Trailer Brake Controller part...
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  • Best Brake Controller for a 2006 Dodge Ram 2500
    The Curt Assure Trailer Brake Controller with Dynamic Screen item # C49UR, you were looking at, would be a great brake controller for your 2006 Dodge Ram 2500. It is a proportional brake controller designed for use with electric or electric-over-hydraulic trailer brakes. If your Dodge Ram came with a 7-way connector or a 4-way connector then you will want the Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In item # C51332. This adapter plugs into a port behind your...
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  • Are Brake Controller Wiring Harnesses for the 2004 Dodge Ram 2500 Universal
    Hello Ed. Brake controller wiring harness # 3020-P for the 2004 Dodge Ram will work with Tekonsha, Draw-Tite, and Reese brake controllers that have a plug and not just loose wires. Curt harness # C51332 will work only with Curt brake controllers. And as far as I could ascertain Hayes harness # HA81782-HBC only works with Hayes controllers. All of these harnesses are also only for controllers that have the plug on them and not just loose wires. Another option, for controllers that do...
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  • How to Find the Stop Light Wire on a 1997 Dodge Ram 1500
    I do have an option for you but unfortunately, we would not have access to the wiring diagram for a 1997 Dodge Ram 1500. In order to find the cold side of the brake pedal which is the wire that will need to be spliced into to install a brake controller, you would need to test each wire with a circuit tester like part # PTW2993 for the wire that only receives power while the pedal is depressed. Once you find this wire you can use a quick splice connector like part # SWC501746-1 to avoid...
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  • Curt Venturer Trailer Brake Controller Installation in 2006 Dodge Ram 2500
    Any trailer brake controller, including the Curt Venturer # C74VV, uses a 4-wire hookup. All brands and models of trailer brake controller have a white ground wire, a black 12V power wire, a red input signal wire and a blue output wire. The white ground wire connects to battery negative; the black power wire connect to the battery + terminal through a 30-amp circuit breaker or fuse; the red input signal wire connects to the cold side of the brake light switch above the brake pedal; and...
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  • Installation of Brake Controller on 1997 Ram 1500 Club Cab with Factory Trailer Plug
    We do appreciate your continued patronage and I think we can assist you with this. If you can't find the plug and the dealer doesn't offer any help on this, then you can hard wire in the controller to your 1997 Ram 1500, so you will be able to install the controller it'll just be a bit more time consuming. You will need a circuit tester like the # PTW2993 to test wiring functions under the dash, and you may need some butt connectors like the # DW05745-5 to complete your wiring connections....
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  • Quality Trailer Brake Control for a 2006 Dodge Durango
    You are thinking of Tekonsha brake controllers. They are pretty much the leader in the brake controller industry. The Curt controllers would not be my first choice. I prefer Tekonsha controllers because they have a long proven track record of quality and performance. The Curt controllers are a less expensive option but they are new to the brake controller industry. They did have some performance issues initially but they are improving. I recommend the Tekonsha P2, # 90885. This is a proportional...
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  • Recommended EOH Trailer Brake Controller for a 2001 Dodge Ram
    The Curt TriFlex Trailer Brake Controller part # C24VV is an excellent option for a 2001 Dodge Ram and will work with trailers that have electric over hydraulic brakes. It also offers plug-in-play installation when used with the Curt Custom Wiring Adapter part # C51332. This will be a great option that will serve you well
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  • Wiring Adapter for Curt Brake Controller Installation in 2006 Dodge Ram 1500 Quad Cab 4 X 4
    If your 2006 Dodge Ram 1500 has a factory 7-way socket on the bumper then the correct brake controller adapter harness for your Curt controller is part # C51332. If this is how your truck is equipped then the connection port will be located under the steering wheel, just to the right of the emergency brake pedal. If your truck does not have the factory 7-way and the under-dash port for a brake controller then you can do a hard-wire type installation using part # ETBC7. This install kit...
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  • Best Brake Controller For 2005 Dodge Ram 3500 With Bumper Pull Camper
    First off, the proportional brake controllers are definitely recommended for a situation like this. They provide better response so they are safer, and also have less wear and tear on your trailer's brakes since they apply braking pressure equal to your vehicle's braking. For your 2005 Ram 3500, I recommend the Curt TriFlex # C24VV with adapter # C51332. Curt is a very trustworthy and reliable brand, and this controller is one of the most reliable controllers on the market. It is good for...
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  • Is Anything Else Needed to Install Curt Venturer Brake Controller on a 2005 Dodge Dakota
    If your 2005 Dodge Dakota has the factory 7-Way then you need the Custom Wiring Adapter # C51332 to install the Curt Venturer # C74VV. Sure you can hardwire it but this gives you a great way to easily connect and disconnect the controller without having to install it permanently. Same thing if you don't have the factory 7-Way. You will need the Universal Adapter # C51515 to avoid splicing the controller directly into your vehicle wiring. This adapter does require splicing but the end with...
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  • What Is The Blue Connector For In The Glove Box Of The Ram 2500
    I will be happy to explain how why the blue plug would not be installed in the wiring bundle. The blue plug is an adapter that's used to install an after-market brake controller. When installing a brake controller vehicles sometimes already have a plug and play connection under the dash. A plug and play connection is a connection that does not require the brake controller to be hardwired to the vehicle. Some brake controllers like # 90195 will need a plug or adapter like you have the #...
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  • Curt Spectrum Brake Controller Showing no Trailer on 2000 Dodge Ram 2500 After Replacing Connectors
    Yes, you are definitely on the right track. If your Curt Spectrum Trailer Brake Controller # C51170 is still not showing a trailer is connected and you have already replaced the connectors, I think it has to be a short either on the brake wiring or the brake magnets themselves. Before replacing your brake assemblies entirely, start by just checking the wires to the brake magnets (if you have not done so yet) and look for wires that may be pinched or otherwise damaged and fix as necessary....
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  • Brake Controller for 2008 Dodge Durango with Factory Wiring Harness for Tow Package
    You need to purchase both the Curt Brake Controller # C51170 and the Curt Wiring Harness # C51332 for your Dodge Durango as they are sold separately. This allows you to plug directly into the port that comes with the tow package and is located directly under your dash.
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  • Install Harness for Curt Assure Brake Controller in 2007 Dodge Ram 2500
    To install the Curt Assure brake controller part # C49UR in your 2007 Dodge Ram 2500 all you need is the correct install harness # C51332 and you'd be set. This plugs into the brake controller port you have under your dash.
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  • Parts Needed To Install Brake Controller on 2005 Dodge Ram 1500
    Since your 2005 Dodge Ram has the factory installed 7-Way, to install a brake controller you will just need the brake controller itself and the proper wiring harness to plug it into your Ram. If you go with the Curt Venturer, # C74VV, the only other part you will need is wiring harness # C51332. I have included a link to the installation details for you. The wiring harness plugs into a connector already on your vehicle. The connector is located underneath the dash, to the left of the...
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  • Replacing Tekonsha Brake Controller For a Curt Brake Controller in 2009 Dodge Ram 3500
    The Curt Assure Trailer Brake Controller with Dynamic Screen # C49UR will require a Curt Custom Wiring Adapter # C51332 to connect to your 2009 Dodge Ram 3500 that has a factory plug in connector. Another option is to use a Curt Wiring Adapter for Cequent Trailer Brake Controller Wiring Harnesses # C51520 to adapt the Tekonsha harness to plug into the curt. This will work best if your harness is difficult to get to or your wiring is hardwired and you do not want to have to remake the connections...
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  • Curt Brake Controller Recommendation for 2005 Dodge Ram 2500
    The price for the Venturer controller part # C74VV and install harness part # C51332 is tough to beat but a proportional brake controller will be a much better option. Proportional controllers sense how hard you are applying the brakes and apply the trailer brakes the same way. Time-delayed like the Venturer put out a preset amount of braking power so they aren't as effective. So instead the Triflex part # C24VV with the install harness # C51332 would be the better option for your 2005...
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  • Curt Venturer Trailer Brake Controller Installation in 2008 Dodge Ram Pickup
    To install the Curt Venturer Trailer Brake Controller # C74VV in your 2008 Dodge Ram Pickup that has a factory 4-pole flat trailer wiring harness you will use our # ETBC7 installation kit to install a 7-way, along with the wiring adapter # C51332 that will plug in under the dash.
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  • Curt Brake Controller Pigtail for a 2003 Dodge Ram and Curt Discovery Brake Controller
    The Curt brake controller wiring harness for the 2003 Dodge Ram is # C51332. If you will be moving the controller back and forth from one truck to the other I also recommend a second mounting bracket, # C51124.
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  • Is there a Vehicle Specific Pigtail for the Redarc Tow-Pro Elite for My 2006 Dodge Ram 1500?
    Hello Duane, The Redarc Tow-Pro Elite Brake Controller - Dash Knob - Off-Road Mode - Up to 3 Axles - Proportional # RED44FR would be the right part number for your 2006 Dodge Ram Bighorn 4x4 1500 because Redarc does not have a vehicle specific pigtail for your year, make, and model. So Yes, you would be able to cut the connector off to splice in the controller. If you'd prefer to avoid splicing, we also carry the Curt Spectrum Brake Controller w/ Custom Harness – Dash Mounted Knob – Up...
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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:
Amanda K
Employee Sabrina W
Written by:
Sabrina W

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