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

Part Numbers: C51170,C51342

Retail:$265.97

Our Price: $210.06

$185.06 after $25.00 Mail-In Rebate

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Curt Brake Controller - C51170
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Curt Spectrum Trailer Brake Controller - 1 to 4 Axles - Proportional - Dash Mount
part number: C51170

Proportional brake controller installs anywhere in your cab and at any orientation. User-friendly, dash-mounted control knob with 10 tri-color LEDs creates a clean, OEM look. Easily adjust braking output, switch between modes, and view diagnostics.

Features:

  • Brake controller activates trailer brakes in proportion to your vehicle's braking action
    • Automatically adjusts trailer's braking based on deceleration of tow vehicle
    • Activates immediately - no pausing like with time-delayed brake controllers
  • Push-button rotary control knob mounts on your dash for easy access and a clean appearance
    • Allows for convenient braking output and sensitivity adjustment
    • Equipped with 10 tri-color LEDs to display settings and diagnostics
    • Provides easily accessible manual override - just press knob to activate
  • Main module mounts out of sight and at any orientation
    • No more banging your knee on a bulky controller
    • No interference with airbags or other vehicle accessories
  • Triple-axis accelerometer is highly responsive to ensure smooth, uniform stopping action
    • Allows unit to automatically level and calibrate
  • Manual override functions as time-based for a slow reduction in trailer braking
  • Compatible with ABS brakes, cruise control, low-voltage, and pulse width modulation (PWM) systems
  • Multiple mounting options - choose between drill-mount or adhesive-mount
    • Mounting hardware and adhesive pads included
  • Plug-in, vehicle-specific brake-control adapter can be used for certain applications to reduce installation time
  • Assembled in the USA


Specs:

  • Application: trailers with up to 4 axles (8 brake assemblies)
    • Designed for use with electric or electric-over-hydraulic trailer brakes
    • Works with 12-volt vehicle electrical systems
  • Main module dimensions: 3" long x 3-1/2" wide x 7/8" tall
    • Horizontal distance between mounting holes (center to center): 3/4"
    • Vertical distance between mounting holes (center to center): 2-3/4"
  • Control knob diameter:
    • Base diameter: 1-3/4"
    • Knob diameter: 1"
  • Control knob overall height: 1-1/2"
  • Full length of wiring harnesses when connected: 48"
  • Limited lifetime warranty


Spectrum Dimensions

Whether you're a seasonal or weekend tower, you'll appreciate the out-of-the-way, easy-mount design and factory appearance of the Spectrum brake controller. The rotary knob allows for convenient adjustment, and it is lined with sleek, multi-color LEDs that provide valuable diagnostics.


Proportional Braking

With a proportional brake controller, you can get heavy-duty emergency braking, general braking, or slow-to-an-idle braking for your trailer automatically. The intensity with which your trailer brakes are activated and the rate at which they are applied are dependent on the deceleration of your tow vehicle. This means that, unlike time-delay controllers - which send the same amount of preset power to your trailer brakes every time - proportional controllers are able to adapt to every braking situation differently. So, if you slam on the brakes in your truck, your trailer brakes will activate with that same extreme intensity. And if you merely slow down as you approach a red light, your trailer will gradually brake in the same manner.


Once the Spectrum is mounted, it will sense - via an internal 3-axis accelerometer - how your tow vehicle brakes. This inertia-based sensor responds to the deceleration of your tow vehicle as you brake by signaling the controller to send out enough power to your trailer brakes so that they are activated with an intensity that matches. The result is uniform braking across your towing setup. No push-pull action - just smooth, proportional braking every time.


How to Use the Spectrum Brake Control

The Spectrum provides the smooth, precise braking action that you've come to expect from Curt brake controllers while allowing you to maintain the from-the-factory look of your vehicle. Make all of your braking adjustments from the dash-mounted rotary knob, which is equipped with 10 tri-color LEDs for simple monitoring. The LED lights change color to display different information about the controller, including which of the 4 operating modes is selected and multiple diagnostic indicator sequences.


Spectrum Control Knob

To switch between modes, press the control button in the center of the knob.


Spectrum Modes and Functions

Output: The output mode lets you adjust the maximum amount of power that will be applied to your trailer's brakes. You will need to adjust the output during the initial setup, but following that, you should only need to adjust the output control when the trailer load changes, if you switch trailers, or when road conditions change. Optimum output should cause your trailer brakes to function effectively without locking up.


Sensitivity: In sensitivity mode, you can fine-tune the power by adjusting the sensitivity of the internal sensor to get either more or less aggressive braking.


Boost the setting to get your trailer brakes to activate with more intensity right off the bat. This means that they will also reach maximum braking faster simply because they will start out at that higher intensity. This is particularly beneficial if you are towing a heavy load because the intensity required to stop that load may be far greater than that needed to halt your vehicle. Therefore, sending out more initial power to the trailer brakes - and causing them to reach maximum braking faster - allows you to better control the trailer so that it doesn't push your tow vehicle before coming to a complete stop.


You may need to adjust the sensitivity to accommodate for driver preference, trailer load changes, or changing road conditions.


Manual Control: Press and hold the button on the knob to activate the manual override.


Manual control mode is used to activate the trailer brakes independently of your tow vehicle. Doing this can have several advantages. Slowing the trailer down a bit as you travel can help to pull the trailer back in line behind your tow vehicle when you experience sway. You can also use the manual override to achieve a slow reduction in speed by creating just enough drag to slow your entire setup using only the trailer brakes. In addition, the manual override can help prevent a jackknife situation by limiting the momentum of your heavy trailer as you travel down steep hills.


When the manual control is pushed, the brake control will ramp up the trailer brakes until the maximum power output set is reached. If you realize that you need more power immediately, turn the control knob clockwise to reach maximum power faster.


The maximum power for the manual override can be chosen during installation via a small switch at the rear of the unit. The brake control unit is factory-set with the switch in the "ON" position, which allows 100% trailer braking power when manual control mode is actuated, regardless of the output control setting. When the switch is in the "OFF" position, the maximum override braking power will be determined by the output control setting.


The state of California requires that your trailer's brake lights illuminate when the manual override on your electric brake controller is activated. Therefore, to comply with state regulations, the Curt Spectrum offers a brake light activation feature. A small switch at the rear of the unit controls the unit's brake light activation feature, and it is factory-set in the "ON" position.


Simple, Out-of-the-Way Installation

Long gone are the days of knocking your knees on your brake controller. The 2-piece Spectrum can be installed nearly anywhere, and at any orientation.


Spectrum Control Knob LEDs Illuminated

First, determine your preferred location for the control knob. This is where you'll make braking adjustments, so it will need to be easily accessible while you're driving. Whether the knob is installed in a blank panel switch, on an open area of your center console, or somewhere on your dashboard, the simple, subtle design will provide a clean, uncluttered look. And the knob sits flush against any flat surface with no parts protruding behind the mounting location. This means that there is less chance of interference with wires and instrumentation behind your dash or console, so you have more mounting options than you might with other similar brake controllers.


Spectrum Control Unit Mounted Under Dash

Once you have determined where to mount the control knob, you'll need to find a good place to install the main unit. The only mounting restriction for the unit is that the included 4' long plug-in cable must be able to reach between the main unit and the knob.


The triple-axis motion-sensing accelerometer that is inside the main unit detects the inertia of your vehicle and trailer, and it uses this information to recognize the direction of travel and any change in position. Because this feature can read the direction of travel, the main unit can be mounted at any orientation for greater flexibility.


If your vehicle already has a plug-in brake controller wiring harness, just connect the main control module to it. Otherwise, you will need to purchase a vehicle-specific wiring harness to plug into. If a harness is unavailable for your vehicle, hardwiring will be necessary.


Both the control knob and main module can be mounted using the included hardware or adhesive pads for fast and easy installation.


For assistance in properly wiring the Curt Spectrum, please refer to the diagram below:


Spectrum Wiring Diagram

Installation Accessories

See etrailer.com's exclusive 7- and 4-way brake-control installation kit (ETBC7 - sold separately) if you don't already have a 7-way plug at the back of your vehicle.


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



51170 Curt Spectrum Trailer Brake Controller



California residents: click here



Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In
part number: C51342

Install your Curt electric trailer brake controller quickly and easily with this custom wiring adapter. Simply plug one end of the adapter into your brake controller and then plug the other end into the junction box beneath your vehicle's dash.

Features:

  • Plug-in wiring adapter allows for quick, simple installation of your electric trailer brake controller
  • No cutting or splicing required
    • Custom connector end plugs into the electric junction box beneath the dash of your vehicle
    • Other end plugs into the back of your electric brake controller
  • Compatible with time-delayed and proportional brake controllers from Curt
    • Brake controller must have built-in plug for adapter to connect - will not work on controllers with pigtail wiring harnesses
  • 2' Long, 12-gauge wires have protective covering to deter damage
  • Limited 1-year warranty


Installation of Curt Brake Controller Adapter

To install your Curt electric brake controller, you need to connect the wiring of the controller to your vehicle. Certain auto manufacturers offer pre-wired options, typically known as tow packages, wherein wiring is run for you from the dash to the trailer connector on the back of your vehicle. When this is done, a port is installed at your dash so that you can easily plug in a brake controller.


Junction Box on VehicleBrake-Control Adapter Port

This adapter plugs into the port that is built into the electric junction box beneath your vehicle's dash. The black box is located to the left of the steering column, just above the carpet. To plug in the adapter, first remove the cover on the box. The adapter plugs into the second slot from the left, on the top row.


No hardwiring is required to install this adapter. After you plug it into the factory port, you simply plug the other end of the adapter directly into your electric trailer brake controller. Because there are no wires to connect, installation is not permanent. You can unplug and remove your brake controller at any time to transfer it to another vehicle or securely stow it away.



51342 Curt Quick Plug Brake Control Adaptor Harness



California residents: click here



Video of Curt Spectrum Trailer Brake Controller - 1 to 4 Axles - Proportional - Dash Mount


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




Video Transcript for Curt Brake Controller - Proportional Controller - C51170 Review

Speaker 1: Today taking a lot at the Curt Spectrum Trailer Brake Controller. The Spectrum Trailer Brake Controller gives you powerful precise braking operations in an extremely simple design inside your vehicle.The main module which is this part here. This can be mounted anywhere at any orientation. It can even be mounted behind the dash of the vehicle for a completely out of sight design.The interface is a single rotary knob with a push button in the center. This unit allows the driver to easily adjust the brake power output. So, rotating the knob clockwise increases the brake output.

Rotating the knob counter clockwise decreases the braking output. It features ten tri color LED's to show the automated power output of the control and the brightness can be adjusted as needed.Now, the main module, again this part here. This has a triple access motion sensing accelerometer that's able to detect the inertia of the vehicle and trailer no matter what. So, whatever speed and whatever grade your traveling on, up or downhill. The spectrum produces the exact amount of power needed for a smooth safe stop every single time.It also features automatic leveling and calibration so that eliminates set up requirements.

This is a fully compatible unit so it's able to operate up to eight trailer brakes at a time. So, anywhere from one to four axle trailers. It can be used on vehicles with ABS brakes and cruise control. It works with low voltage and PWM systems.Installation is quick and easy. Two installation options are included.

You'll notice that is has the pre-drilled holes here so you can actually drill this in so you can mount it using screws. This as well comes with a base and hardware so you can actually mount this to your dash and give it that OEM look, like it looks like it's from the factory that way. The design of the unit's going to match the design of the interior of your vehicle. So, really nice, again two installation options are included. Drill mount or surface adhesive mount and it does come with adhesive pads.It comes with a quick plug for easy plug and play installation.

This is designed to connect to vehicle specific harness plug and then plugged directly into your vehicle. It can be hardwired as well if there is not a plug available for your specific vehicle.The unit features four modes and three indicators. So, I'm going to spend some time going over those real quick. When it comes to the four modes that it offers. It offers manual, which is indicated by red LED's, brightness, which is indicated by white LED's, output which is green and red and sensitivity which is blue and red.Then, when it comes to the indicators, it's calibration, which it will ramp up so it will be like a dotted line going up. Overload, which will be flashing and then disconnected which is also flashing.Now, it does come with a quick reference guide so it shows you right here all the indicators. So, here's your four modes, again, manual, brightness, output, sensitivity, and it shows you the colors that go with it. Red, white, green and red, blue and red. Then you have calibration which is green, that'd be ramp up, so each line will appear individually and then you have overloaded which would be flashing red and yellow. Disconnected would be flashing blue.You definitely want to keep that quick reference guide handy. It's just a small card you can put in your wallet, in your glove compartment, anything like that. But, calibration simple indicates when the brake control is self calibrating it occurs when power is applied to the brake control and the trailer is connected.The overload indicator indicates when the brake control is in an overload or short circuit condition and then the disconnected indicators indicates when the trailer has been disconnected or if the brakes are pressed with no trailer connected at all.The manual override can be engaged by pushing the middle button and holding it down. So, pressing and holding the button during any mode activates the manual brake output. It functions as time based and ramps up over time. The red LED's light up in a sequence proportionally to the brake output. You can adjust the gain and active process by rotating the knob clockwise to increase and counter clockwise to decrease the gain while holding the button down.Then, releasing the button returns to the previous mode every time. The manual control can be set up to allow 100% of the units power to the trailer brakes or to limit power to the output control setting. This feature is set up at installation using the small switch at the rear of the unit.Also, brake light activation with the manual control is an optional setting as well. Some tow vehicles circuits do not allow power for brake lights from a second source so in these applications the brake light feature can be switch off using a second small switch at the rear of the unit.Then it also features sensitivity control so you can adjust the trailer brake aggressiveness simply by using the knob to increase or decrease the sensitivity. That's great because that can be adjusted for individual driver preference, trailer load changes, or changing road conditions.The product is a very clean system. It's very easy to get connected. I do want to point out that I already made my connections here but this can be disconnected really easily and then if you want to feed the wires through your dash, like through this mount here and through you dash for that nice OEM look, mounted to your dash. Each individual wire actually feeds into this plug right here. So, I already did the connecting but when it comes to you this will not be connected. The install guide walks you through how to do it. Very easy, only took me about, really just a few seconds, maybe up to a minute to get all those connected. Then once you have the wires connected and you have the wire routed where you want it simply just plugs in right there. That's all there is too it.So, nice, small, compact unit. Put it in the palm of my hand. You can see how it fits. How small it is. Same right here, just a nice small design. Compact, very clean, very easy to use.That's going to do it for today's look at the Curt Spectrum Trailer Brake Controller.



Customer Reviews

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

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In - C51342

Average Customer Rating:  4.8 out of 5 stars   (66 Customer Reviews)

Proportional brake controller installs anywhere in your cab and at any orientation. User-friendly, dash-mounted control knob with 10 tri-color LEDs creates a clean, OEM look. Easily adjust braking output, switch between modes, and view diagnostics. Install your Curt electric trailer brake controller quickly and easily with this custom wiring adapter. Simply plug one end of the adapter into your brake controller and then plug the other end into the junction box beneath your vehicle's dash.

- C51170
by: Scot06/19/2019

Great product and easy to install with harness, looks OEM stock! 660129



- C51170
by: Fred06/10/2019

When installing the control knob I could not use the screw mount base. The epoxy ( or what ever it is) on the back of the knob assembly that covers the wire connection kept the knob from snapping into the mount. I had to use the other mount to install the knob, hopefully it will stay in place. 655996



- C51170
by: Luther05/04/2019

No trouble hooking it up with the plug and play connector,took about 1/2 hr and works great 638208



- C51170
by: Mike10/14/2018

Great product. Easy to install. Easy to setup and program. 574466



- C51170
by: Matthew05/17/2019

Fits perfect if you want the more factory install look. Easy to mount and the control box is out of site with nothing to bash you knee into under the dash. Haven’t hauled my trailer yet but, I like how clean the finished product looks 642918



- C51170
by: James03/14/2019

I could not have imagined an easier, and more sleek, trailer brake controller to install. I put this into our 2019 4Runner, and it looks great, and I am not hitting my knee on the old style controller like we had in our previous tow vehicle. With the additional wiring harness that etrailer sells for the 4Runner it was simple plug and play. No need to struggle with finding correct wire lengths, just used some zip ties to have everything be tidy and clean. Thanks etrailer! 611935



- C51170
by: Richard S C04/03/2019

Honda Ridgeline 2019 Install Plan to tow an RPOD 195 Travel Trailer as soon as I pick it up Simple Installation Didn't need to remove dash to install, as free space behind this location. Knob on lower left of Dash. Module Tie Wrapped to the Parking Brake Bracket under the Dash. Used the C51392 Wiring adapter to connect the Brake Controller to the Truck. Pictures of Dash Install only. Haven't functionally tested yet as I am waiting on Delivery of the Trailer. 616735



- C51170
by: George05/26/2019

2019 Honda Ridgeline RTL AWD— The Curt Spectrum C51170 controller and harness C51392 was exactly as I had read it would be! All connections hooked up as described and all connectors fit! The knob works as described but I have yet to hook up trailer to get response from the accelerometer! I’m sure the quality shown it will work fine! Only problem I had was access under the dash. Thanks Bill and etrailer! Pictures attached! 647206



- C51170
by: Johnboy Willis05/03/2019

Decided I wanted a high quality brake controller without the clunky box on the dash and this seemed like the best out there. Super easy install. I bought the extra cable for my Silverado and it all plugged in perfectly. I saw somebody complain about tiny connectors. Don't listen to them. This thing is excellent and the quality is clearly top tier. The set up was a breeze and on our first trip out I got it dialed in with no problems. Works better than my previous controller by far. 637364



- C51170
by: Bob In Florida01/12/2019

After knocking my knee into my brake control for the last 20 years with the new GMC Savana I wanted something a little different. Technology has moved trailer brakes forward quite a bit and Etrailer has an immense amount of information! I original looked at the Tekonsha Prodigy RF Wireless Trailer Brake Controller but it would take up a valuable power outlet with the control unit but it's kind of trailer specific as the control mounts to the trailer you never know when you might have to tow another trailer and was leery of the control wandering around the console, Next up was the Redarc Tow-Pro Elite Trailer Brake Controller but did not like the control mounting options. Then ran across the Tuson DirecLink Lite Trailer Brake Controller crazy amounts of technology in this unit but again concerns over the remote so after lots of head scratching the Curt Spectrum seemed like the best choice. Easy install very small control box mounted easily with the included double stick tape under the dash. I moved my traction control button to the left where a blank filler was you have to cut a little piece of it off to get it into the hole as the are "keyed" to specific locations I guess but worked perfectly! I left enough slack in the connection so I can simply disconnect the harness if I am not towing for awhile as the blue indicator lights come on every time you hit the brake if its disconnected. Just installed it so I will send an update after our first trip with the new rig but I'm thinking it will work as described. Thanks again etrailer fast shipping great information!!!! 597075



- C51170
by: Gary10/13/2018

Was an easy install for my 2018 Grand Cherokee with the addition of the specific cable adapter. I was able to secure the main unit under the dash on-top of the diagnostic port bracket and then run the wire for the dial up the drivers side of the dash so that it is concealed once the door is closed. The dial now sits on-top of the left side of the dash by the windshield pillar. I wanted to make this a temporary install incase I traded the truck in the near future. I have not hooked up a trailer yet so can not give a review on how well it works. 574127



- C51170
by: Logan09/24/2018

I've I stalked it but haven't used it yet because I thought the right adapter came with. I like the sleek fit to it so nothings hitting my knees etc. I recommend the design I stall forsure. Not sure how good it works yet like I said. I have a 2006 ford f150 fx4. 568517


Comments

For your 2006 Ford F150, youd need the # C51322
Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In
$13.98
wiring harness. This will allow a plug and play installation. Once end will plug into the brake controller unit, the other into the gray tow package plug shown in the photo you provided.

-- Mike L - 09/25/2018

44003

- C51170
by: Wayne08/25/2018

I was looking for a unit that was out of way and would look like it belonged in the cab of the Chevy Colorado pickup. The Curt Spectrum control was easy to install under the dash and out of the way. The LED knob went on the dash with the wires going through the dash out of sight. 557904



- C51170
by: Robert08/06/2019

I could have bought for the same price the one that plugs in series between your 7-way, but I liked the more permanent solution and didn't want to control it from my smartphone. Very pleased with the factory like look in my Nissan PRO4-X. 681352



- C51170
by: Great Product09/08/2019

Ordered about 1 year ago. It has worked great. Looks great and easy to install. Takes a little getting use to it. Looks very stylish in my 2013 Ram. It goes perfect with the inside trim. 699336



- C51170
by: Cynthia09/03/2019

My brother in law installed this for me and he was thrilled. He said it was easy and went in very quick. It is working great. 697299



- C51170
by: Warren M08/26/2019

This controller installed as stated. It has great instructions for easy installation and works well. 694144



- C51170
by: Eric08/18/2019

Awesome product! I will never go back to the other style of controller! 691114



- C51170
by: Markus08/18/2019

A great unit for my new Jeep Gladiator. The dash design of the truck doesn’t leave much room mounting extras. The surface mount dial and “mount anywhere” brain unit is a great solution for this truck. 691015



- C51342
by: Rod O08/15/2019

The product worked and fit as advertised and as all passed experience with etrailer did what they said. 688452



- C51170
by: Greg B.08/01/2019

I like this controller mainly for its sleek design and it blends into the dash of my Tacoma. It works right out of the box and I’ve rarely had to adjust the setting manually. It sometimes lights up weird when not in use but works fine. I’d purchase again. 679138



- C51170
by: Patrick J07/24/2019

Arrived in good shape. Will have to put it all on yet. 674855



- C51342
by: Tanya G.05/31/2019
2002 Chevrolet Silverado 1500

Fits my Avalanche 1500 perfectly. Thank you 650391



- C51170
by: Dennis04/13/2019

Very easy to figure out. Wish they had an online vehicle wire color reference based on year make model and style. Did find a video on line to find the wires and metered them out which wasn’t too hard. I would buy this again 628186



- C51342
by: Austin03/21/2019

Came as described, plugged right in. 613275



- C51342
by: Shawn03/15/2019
2000 GMC Yukon

Easy install. Fit my 2000 GMC Yukon perfect. In and done in less than ten minutes. 612252



- C51342
by: Eric12/29/2018
Chevrolet

I purchased a Curt brake controller from the Chevy dealership and when it arrived it was a controller and a hand full of wires to splice into my system. I got a hold of etrailers and the staff was pleasant and sold me what I actually wanted from the dealership. Now I know to call these guys for all my trailer wiring needs. 593806



- C51170
by: Doug r.10/11/2018

fast shipping. easy to install,makes nice factory look. 573455



- C51170
by: Alan06/18/2018

received my package two days before i expected it. 523613



- C51342
by: Brandon12/07/2017

No problems. Plug and play. 458170



- C51342
by: Paul12/02/2017

A good product for the price. etrailer has always been great to order from, product ratings, instructions, fast delivery, and variety. 456653


Comments

Great product for the price, works great.

Paul - 12/03/2018

46354

- C51342
by: Wyatt Kelley09/30/2017
2002 Chevrolet Silverado

Ordered parts, came in earlier than expected, everything worked great. Good place to deal with. 438158



- C51342
by: noah r07/20/2017

Works awesome hooked right into my truck it took longer putting the screws in than it did anything else. Very happy and stops trailer with ease. just what i needed for the heavy loads. 408596



- C51342
by: Moose07/14/2017

Well built wiring adapter for brake controller plugged into fuse box two screws for new brake controller , done in ten minutes and tested on the road with trailer ..Whole install and op's check took 30 minutes.. 405971



- C51342
by: Matt L04/28/2017

Worked perfectly. I had my brake controller installed in minutes. 373530



- C51342
by: Mandy04/26/2017
Chevrolet

Easy install with factory 7way plug didn't need any extra not included in kit. 02 Chevrolet 2500HD and pull an aluminum 3 horse gooseneck trailer, this brake system works great so far loaded and unloaded. Mounted nicely out of way to the dash under shifter. 372906


Comments

Im still very happy with the product i purchased. Works great!! I pull a 3 horse gooseneck aluminum trailer behind my 02 Chevy 2500 4x4 and have no problems stopping even fully loaded down.. thank you for checking in with me..

Mandy - 04/27/2018

37756

- C51342
by: Quality piece01/04/2017
Land Rover Discovery II

Ordered this due to wrong harness coming with brake controller. Haven't installed yet but looking at the harness looks like it will work as intended. Plugs directly into the Curt Discovery controller I received. Thanks 329719



- C51342
by: Alvin H11/17/2016

I have not had the opportunity to install my latest purchase but I am extremely satisfied with all my purchases from etrailer as to the correct part being sent and full instructions for installation. Please keep up the good work and I am so glad for the free shipping of my purchases. Thanks, Al H 320161



- C51342
by: wm Baldwin08/12/2016

works very good for a low cost controller. good quality. 283052



- C51342
by: John07/18/2016
2002 Chevrolet Silverado

worked great. the web sight my daughter bought her controller from did not show that she needed this adapter harness but etrailer web sight did. bought the harness separate and installed in seconds. that's why I tell her I like etrailer. 273145



- C51342
by: Jim J.07/09/2016
2000 Chevrolet Silverado

Trailer brake controller was very easy to install and works great with my trailer. 269986



- C51342
by: alan s.06/12/2016

I got kit witch should of had a square end but they sent a flat hook-up wouldn't fit so I had to re-order right one$2.89 shipping ,plus had to wait to hook -up would buy from again but would talk to some body before I order great fit work when plugged in 260478



- C51342
by: Rob P.06/02/2016

Just as described. Perfect fit and super fast delivery. 256180



- C51342
by: Richard05/31/2016

Thank goodness I wasn't needing the part ASAP. It took ten days to get it. I have not had the opportunity to use it yet so I don't know how it will work. 254876



- C51342
by: Marvin05/31/2016

brake ontrol works great and better then the one I had before. The plug I got for the truck just pluged right in and I was all set to go. very happy with its performancw. 254253


Comments

works great no problems

Marvin - 05/31/2017

24382

- C51342
by: Bill a01/15/2016

just as described 235488



- C51342
by: Jim m12/09/2015
Chevrolet Silverado 1500

The brake controller for my Chevy 1500 HD was simple to install with the easy to follow instructions. It works great. 233478



- C51342
by: Jason A.09/03/2015
2002 GMC Sierra

This product made hooking up a trailer brake unit very simple. I would recommend this to anyone looking to set up a trailer brake unit. 223750



- C51342
by: Coltin06/28/2015

I bought the brake controller and wore harness it came fast and was super easy to install and used it the next day to tow my at and trailer and it worked perfect I would deffinitly recommend this brake controller to anyone it's a great but for the low price 207996



- C51342
by: Steve S01/28/2015

the cover was exactly what we wanted. Shipping was expedient and in the time stated. 171613


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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 # 331-EBRH-ACCV2, 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
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  • Comparing the Curt Spectrum Brake Controller and Redarc Tow-Pro Elite for a 2016 Audi Q5
  • Both the Curt Spectrum # C51170 and the Redarc Tow-Pro Elite # 331-EBRH-ACCV2 are excellent brake controller options for your 2016 Audi Q5 but in comparison I recommend going with the Tow-Pro Elite over the Spectrum. Although both controllers can be used as proportional brake controllers (they activate your trailer brakes at the same time and with the same intensity as the brakes on your Q5) the Tow-Pro Elite can also be switched to "User Control" mode which means your trailer brakes
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  • Brake Controller Harness for 2020 Jeep Gladiator With Factory Tow Package
  • There is a brake controller with a wiring harness for a 2020 Jeep Gladiator with the factory tow package; you will need the Curt Custom Wiring Adapter for Trailer Brake Controllers # C51459. The Curt brake controller I strongly recommend with this adapter is the Curt Spectrum Trailer Brake Controller # C51170 with Wiring Adapter # C51515 (which is a hardwire adapter) because it uses a small control knob that is both simple to use and keeps a large, awkward brake controller out of your cab. The
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  • Is Curt Spectrum Trailer Brake Controller a Good Option for 2018 Chevy Silverado 1500
  • The Curt Spectrum Trailer Brake Controller # C51170 is a great choice for a brake controller in your 2018 Chevy Silverado 1500 because it is easy to use with the control knob you referenced and is a proportional controller so you will get smooth braking. To install it in your '18 Silverado you would also need the Curt Custom Wiring Adapter # C51451. The only other brake controller I recommend checking out is the Curt Echo Mobile Trailer Brake Controller # C51180 because this is even
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  • Curt Spectrum Trailer Brake Controller on a 2019 Subaru Ascent
  • You will have to hardwire the Curt Spectrum Brake Controller part # C51170 to your 2019 Subaru Outback Wagon but it is a pretty simple process. You will need to first start with a 4-way confirmed as a fit for your vehicle. For that you'd want the Tekonsha part # 118467 which is a plug and play style of install. From there you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter
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  • Length of the Curt Spectrum Brake Controller Wiring
  • The Curt Spectrum Trailer Brake Controller # C51170 has a wiring harness that is 48 inches long between the knob and the concealed box. I reached out to the manufacturer to confirm that measurement for you. If you have the factory 7-way on your 2016 Honda Pilot then you will simply use the Custom wiring harness # C51392 which has a 24 inch length to connect your controller to your factory wiring harness. If you do not have the factory 7-way, then you will want the universal wiring
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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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  • Brake Controller Solution for 2010 Lexus GX-460 That Does Not Require Modifying Dash
  • Before getting into install locations for the knob of the Curt Spectrum part # C51170 you might be best off with the Curt Echo Mobile brake controller part # C51180 instead as this controller plugs into the 7-way at the rear of your vehicle and once you sync your phone to it you are ready to tow without needing to wire anything or modify your vehicle in any way. But back to the knob location for the Spectrum...you could mount it near the AC controls on the center console like in the
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  • Can Curt Spectrum Brake Controller Install in 2011 Ford F-350 with Integrated Brake Controller
  • The Ford factory brake controller that is in the dash does not have to be removed. You will need to unplug the connector under the dash and plug in the # C51432 adapter for the Curt Spectrum brake controller # C51170 to the factory brake controller plug behind the dash. The vehicle will need the computer flashed so it will keep from searching for the connection to the OEM brake controller in the future, eliminating any fault codes. This will usually have to be done at the Ford Dealer.
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  • Wiring Harness for Curt Spectrum Trailer Brake Controller on 2016 Jeep Wrangler Unlimited
  • The correct adapter for the Curt Spectrum # C51170 trailer brake controller on your 2016 Jeep Wrangler Unlimited is Wiring Adapter for Curt Trailer Brake Controllers # C51515. One end of this adapter will plug into your Spectrum brake controller and the other end will splice into your Jeep's brake controller wiring; you can use Butt Connectors # 05731-5 to help make this connection. I have added a link to a video review of Adapter # C51515 for you to check out as well.
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  • What Install Harness is Needed for Curt Spectrum in 2019 Chevy Suburban
  • The install harness you need for the Curt Spectrum part # C51170 in your 2019 Chevy Suburban is the part # C51451 which plugs directly into the port on your vehicle and then into this controller for a simple install.
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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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  • Parts Needed to Install Curt Spectrum Brake Controller in 2019 Toyota Tacoma
  • Your 2019 Toyota Tacoma has a plug and play style of brake controller install port under the dash which will easily allow you to install the Curt Spectrum part # C51170. All you need is the adapter part # C51455. To reach the connector, first locate the notch in the access panel in the center of the dash, near the driver's side. Using a trim panel puller, carefully pry the panel out and undo the locking tabs to remove the panel. You will find the mating connector behind this portion
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  • Dimension of Bracket for Curt Spectrum Trailer Brake Controller
  • I went out to our warehouse to measure the bracket for the Curt Spectrum Trailer Brake Controller # C51170 that you referenced and found that it has an outside diameter of just under 2 inches (1-15/16 inches to be exact). I have attached the image you sent with this dimension labeled that you can also use for reference.
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  • Trailer Disconnected Indictor When Trailer Is Disconnected From Curt Spectrum Brake Controller
  • I will be happy to assist you with the issue you are having with the Curt Spectrum Trailer Brake Controller # C51170. I reached out to my contact at Curt and they indicated that the disconnected light only comes on when you hit the brakes with your trailer disconnected. Curt advised that there is no way to disable this feature without disconnecting the entire unit.
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  • Dimensions of Components in Curt Spectrum Trailer Brake Controller C51170
  • On the Curt Spectrum Trailer Brake Controller # C51170 the round base of the rotary knob component measures 1-3/4-inches in diameter and has a depth of 1-1/2-inches. The main control box component measures 3 x 3-1/2-inches overall and has mounting holes spaced apart on center at 3/4 x 2-3/4-inches. I made a photo with these dimensions which is linked for you. The Spectrum does have a 10-LED display but the controller output is not limited to only 10 specific power and boost settings.
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  • Can Trailer Brake Controller be Used on Harley Davidson Motorcycle Pulling Small Trailer
  • The Curt Spectrum Trailer Brake Controller # C51170 can be absolutely be used with your Harley pulling a small trailer for your pups (and in the process making your wife happy). Normally with a motorcycle you want to use a time-delayed controller like the Curt Discovery # C51120 but since the Spectrum's main unit can be mounted at any angle, this is one of the proportional controllers that can be used so long as you can find a good mounting point for both the main unit and the control
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  • Easy to Install Brake Controller Recommendation for 2020 Jeep Gladiator
  • For your 2020 Jeep Gladiator there is only one brake controller that's going to provide a simple and easy install and that's the Curt Mobile Echo part # C51180 which basically just plugs into the 7-way of the vehicle and once synced to your phone is ready to go with one of the most advanced brake controllers out there. The Spectrum # C51170 would require hardwiring as there isn't an easy brake controller install port under the dash of your vehicle. I attached a review video for the
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  • Do the Lights Flash on the Curt Spectrum Trailer Brake Controller with Trailer Unconnected
  • The two blue lights (see photo) on each side of the Curt Spectrum Trailer Brake Controller part # C51170 will only display when a trailer is disconnected and the brake pedal is applied. You cannot turn this feature off but you can dim it with the included dimmer feature. You can also mount the knob out of direct eyesight which is more or less what it is designed for. If you can tell me what vehicle you will be installing the Spectrum brake controller on, I would be glad to check if
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  • Brake Controller Recommendation More Reliable than Curt Spectrum
  • Curt should cover that. But the Curt controllers in general are just less reliable than the P2 part # 90885 that you mentioned. If I was going to recommend you the best option I'd say go back to the P2, see if Curt might warranty the controller, and then sell it used.
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Info for these parts were:

Edited by:
Leah B
Written by:
Lindsey S
Updated by:
Kristina F
Updated by:
Isabelle B

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