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

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

Part Number: C51392
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Install your Curt electric trailer brake controller quickly and easily with this custom wiring adapter. Simply plug one end of the adapter into your brake controller and then plug the other end into the built-in port beneath your vehicle's dash. 1-800-940-8924 to order CURT accessories and parts part number C51392 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In. Accessories and Parts reviews from real customers.
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CURT Accessories and Parts - C51392

  • Trailer Brake Controller
  • Wiring Adapter
  • Plugs into Brake Controller
  • CURT
  • Vehicle Specific

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


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

Installation of Curt Brake Controller Adapter

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

This adapter plugs into the port on your vehicle's built-in brake control wiring harness. The harness is located underneath the dash, to the left of the steering column, and it is taped to another harness near the emergency brake pedal.

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

51392 Curt Quick Plug Brake Control Adaptor Harness

Installation Details C51392 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In - C51392

Average Customer Rating:  4.9 out of 5 stars   (53 Customer Reviews)

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


The Curt Custom Wiring Adapter for the 2017 Honda Ridgeline worked perfectly for the installation of my new Curt Spectrum Trailer Brake Controller. Thanks etrailer!Thanks Curt!



The Curt Spectrum Trailer Brake Controller has been working flawlessly. I am pleased that the custom harness made the install so simple.


Have an installed it yet but it looks good thanks for the thanks for the fair shipping

2018 Ford Transit Connect

Installed the Curt Triflex in 2018 Honda Ridgeline RTL-E and was completely easy with the C51392 Honda specific wiring adapter that plugged into the Honda pre-wiring just above and left of the emergency foot brake as you look at the pedals. Like how the controller fits nicely in front of the shifter flat on the center console storage tray with a bit of Velcro to hold it and prevent movement in transit and matches the black interior trim well (didn't use the metal bracket that came with it). Have had great luck with Curt products (hitches, adapters, etc.) and this product is very well thought out. Too early to tell about long term use though.


Just finished the install. It was nice to be assured that I had everything I needed to finish the job before I got started. Honda didn't make it easy.

2019 Honda Pilot

This part is listed to fit a 2019 Honda Pilot. I needed one for a 2019 Honda Passport;(basically the same vehicle); however since the Passports just came out in about February no one could tell me if it would work on the Passport. So I took a gamble and ordered this wire. Well I can confirm that this part does work on the 2019 Honda Passport. The hardest part was reaching the plug under the dash and getting this wire to plug into it, all without any room and only being able to get one hand up under dash. Wire made hooking up brake controller a lot easier than direct wiring.

2019 Honda Pilot

This fit my 2019 Honda Pilot perfect. Plugged right in under the dash. The plug branches out of another wiring harness directly above your OBD plug in. On the left side of dash. You will have to lay down and get your head near the pedals to see it tucked up in there. Very easy install, glad I went with etrailer. Made it simple.

2013 Honda Pilot

Worked great I installed my brake controller in new truck in no time. On line instructions were great workout perfect.


Everything about the buying experience has been great! I was impressed with the email communication and the actual phone call to let me know that my ordered had been shipped out. I will be using the website again to make purchases for my trailer and camper accessories! Thanks!


Thanks for the video. Worked great

Honda Ridgeline

Delivered faster than advertised. Took me much, much longer to FIND the Ridgelines connector. Once I going that, it took about 25 minutes to put on and secure the wires




Great no problem

Reynaldo S.




Thanks to Adam for assisting in an overnight delivery and ev”also sending an email when it delivered next day so I knew immediately.


This is a great product. It took about 10 minutes to install with the well illustrated instructions showing exactly what needed to be done. Plug and play and on the road!

2009 Honda Pilot

The adaptor cable fit perfectly into my Honda Pilot and I had no issues with it what so ever. Great technical help is also available from etrailer. I've purchased from them before and they always do a great job.


excellent connector. Just the right le ngth

2011 Honda Pilot

Fast shipping simple to install on my ridgeline and pilot exact fit with the pig tail


I was surprised - completely plug and play! Easy to install


Purchased this controller for limited use.
like the vehicle specific plug adaptor that came with it. Makes for a quick clean install.
Clean compact design and easy to use.


I haven't installed it yet, but the transaction was easy and received product right away.

Mike S.


It has worked great


Perfect adapter so you don’t have to splice into your wiring



Made this really easy



Fairly easy to set up. Works well.


What can you say looks good

Show More Reviews

See what our Experts say about this CURT Accessories and Parts

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  • Troubleshooting Trailer Error When Using Curt Echo Under-Dash Controller on 2020 Honda Ridgeline
    Thank you for all of the info! The Curt Echo Wireless Trailer Brake Controller # C51180 just requires the trailer lights and 12V power pin to operate properly but the Curt Echo Under-Dash Trailer Brake Controller # C27JR and Custom Wiring Adapter # C51392 require your 2020 Honda Ridgeline to have the tow package so all of the wiring exists on your 7-Way - especially the brake control pin in the 5 o'clock position (see attached). If you grab a tester and put it on that pin and then apply...
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  • Install Harness for Curt Assure Brake Controller for 2021 Honda Ridgeline
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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 harness...
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  • Correct Curt Brake Controller Adapter Harness for 2023 Honda Pilot
    Correct, the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51392 is a fit for all models of a 2023 Honda Pilot. It will allow you to use a trailer brake controller like the Curt Assure Trailer Brake Controller part # C49UR which is what I recommend. This is an excellent setup that allows for towing a trailer with brakes without any splicing required. The proportional design of the controller will provide a smooth braking feel and the adjustable display will ensure you...
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    There are a lot of options for brake controllers on the market that work with your 2012 Honda Pilot. The Curt Venturer Trailer Brake Controller # C74VV is a basic time-delayed controller that mounts in the cab of your vehicle. With a time-delayed controller, both the amount of braking power and rate of application can be adjusted to suit your preference, but these settings will be constant once you set them. The installation difficulty and additional parts needed depend on what kind of...
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  • Can I Use the Curt Discovery Brake Controller in a 2021 Honda Pilot
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  • Installing A Curt Spectrum Trail Brake Controller In A 2020 Honda Passport
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  • Recommended Brake Controller and Pigtail For 2020 Honda Pilot With Factory 7-Way
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