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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

Item # C51362
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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 's dash. 1-800-940-8924 to order CURT accessories and parts part number C51362 or order online at Free expert support on all CURT products. Guaranteed Lowest Price 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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2014 Toyota Tacoma - Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In

  • 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 '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.

51362 Curt Quick Plug Brake Control Adaptor Harness

Installation Details C51362 Installation instructions

California residents: click here

Customer Reviews

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In - C51362

Average Customer Rating:  4.9 out of 5 stars   (180 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.


Custom cable made my brake controller installation a simple project. Fit perfectly and took all stress out of the job. I would buy again without hesitation.

Yup, still working as supposed to. No complaints. Well worth the money.
Jim W - 05/27/2022


Using the Curt wiring adapter, installing the Curt TriFlex brake control in my 2006 Toyota Tundra was simple after watching your video. Very pleased with everything I ordered from e trailer.


Much smoother braking than the controller the RV dealer installed. Curt has excellent customer service.

2010 Toyota Tundra

Yes I received my order and installed the brake controller. All seems to be
fine, although I have yet to tow with it yet. Here are a couple photos of
the installation in my 2010 Toyota Tundra.

2011 Toyota Sequoia

Installed on 2011 Toyota Sequoia - Plug and play as advertised.


Fit perfectly, less than a minute to in stall

2017 Toyota 4Runner

Works well, easy to install. Sometimes the lights do not go off. I have to restart the 2017 4Runner and wait for them to go off.


This is a wonderful product. Easy to use, easy to read. Only towed a few times with it, but it made mountain passes so much easier and smoother.

2005 Toyota Tundra

I was sent the incorrect "direct plug in" harness originally but after contacting etrailer they sent out the correct one. Everything works perfectly now.
The small rubber pieces that hold the brake controller to the mounting bracket instantly fell off and rolled away, not the best design. Other than that it is small and compact and works great!


Fit perfectly

2010 Toyota Tundra

Well that was the easiest thing I've ever done on a vehicle. The info on the etrailer site was instrumental in this being a quick plug-n-play mount of the Curt brake controller. I watched the two minute video and 10 minutes later I had a new brake controller installed in my 2010 Tundra.

One year later and the install looks good and the Curt brake controller works as advertised, Im happy!
Ed D - 01/19/2016


Nicole was very helpful when I placed the order and answered my questions. Very easy to install brake controller with the vehicle specific plug in adapter!

2012 Toyota Tundra

I installed the Curt TriFlex Brake Controller C51140 along with Wiring Adapter C51362 on my 2012 Tundra. Was super easy. Thanks for video.

Perfect. No issues at all.
Andrew - 05/15/2018

2008 Toyota Tacoma

Teconsha P3 is an excellent brake controller.

better was the customer service from etrailer....I had an issue with another model, called etrailer, and they made it right. No questions asked. Will definitely shop with them again. Thanks, etrailer! -wade

Love the Tekonsha. Will not buy another Curt. Thanks for asking. And e-trailer was great, especially dealing with the dysfunctional Curt. Thanks.
Wade V - 08/05/2016


The adapter for connecting the trailer brake controller arrived earlier than scheduled. It enabled a quick and easy plug and play connection of the controller to the vehicle.

Worked perfectly - plug and play
John - 06/21/2020


Etrailers catalogue provided a complete & accurate description of the 8 items purchased. Placing the order by phone was fast & efficient. Items arrived within 4 working days, no tax no shipping charge. Professional all around.

The EOH braking system works perfectly. You are my supplier of choice if when I need additional trailer parts on the future.
Pat M - 11/21/2017

2014 Toyota 4Runner

Impressed with customer service. The adapter was damaged in shipment however Joshua made sure that I had a replacement almost immediately. No jumping through hoops no hassle. Good experience.

2015 Toyota Tundra

This was my fourth order from etrailer and, as were the earlier ones, was delivered quickly. The instructions were clear and easy to follow and it took me only about 15 minutes to install the Curt Venturer Trailer Brake Controller with the wiring adapter for my 2012 Tundra. The white ground wire did not have to be grounded separately as it connects to a white ground wire in the adapter. I used Velcro on top of the controller and beneath the panel instead of the included bracket and can easily make adjustments without removing it. Adjusting the slides on top and the left side of the controller to get the desired braking action and a test drive to verify took another ten minutes. Great product.


Excellent controller for my shipping and a great price too! I read up on Progressive vs. Time Delay controllers; and for my needs I felt this Curt controller would be just fine. I just finished installing and adjusting the controller this morning.
We recently bought a '99 Coleman Westlake Pop-up that weighs about 2,400 lbs. dry (much less than my brake-less boat trailer) and wanted to take advantage of the brakes that came on the camper for when we travel in the SC & NC mountains camping. On level ground I have found the controller to be very responsive and easy to adjust. I am sure having working brakes in the mountains will be nice! As others have said, finding just the right place to mount the controller was the most difficult part. The "plug & play" adapter/harness was more than long enough to complete the installation. Oh, did I mention fast shipping too! I am another very satisfied Customer!


Mating harness is perfect. Well made, quality connectors, proper length, time saver, priced right, a no brainer. Buy it!!!!!

Great. This controller is very consistent in applying dependable braking while towing our travel trailer. After dozens of trips and thousands of miles the unit continues to do the job. Very satisfied.
Richard S - 09/27/2018


Item worked great. It was able to connect with the Trailer Brake Controller and straight to my wiring harness in my truck. I couldn't have asked for a better installation! Thanks!!!

2012 Toyota Tundra

Exact fit to the existing plug within the truck. Very simple installation.


Haven't installed yet since I do not have a level surface to calibrate the Curt 51140 brake controller. Travel Trailer currently resting on Jack Stands while in process of doing some restoration work.

Delivery was as expected. Ordered on Sunday and received on Thursday.

I have downloaded and printed PDF instructions (Printed in "Fit to page" for larger print) that will be added to my Owners Manual.

Regarding price; I looked a several RV parts shops and Auto Parts stores both on line and walk-in stores. eTrailer had the best price and the accessories I needed for the installations. The free shipping for orders over $99.00 helped make my decision to place my order. I will revisit the review page when I have everything installed and working.

Thanks eTrailer,


The representative ( Odelia ) was awesome! I explained what I was looking for, she found the item extremely quickly and then offered to help me order it. The delivery was also extremely quick. It seemed as if she packaged it when we got off of the phone and ran to the post office with it!


I was in need of a trailer brake controller along with the wiring harness. ETrailer had a unit in their inventory and made an exact match to connect to my truck. It was delivered on Friday and I pulled a 30 foot, 7500 pound trailer 170 miles on Saturday with brakes that worked flawlessly. I couldn't be happier with my purchase.

Show More Reviews

Ask the Experts about this CURT Accessories and Parts

  • Will a Curt Brake Controller Wiring Harness Fit a Hayes Brake Controller on a 2012 Toyota Tacoma
    Curt brake controller wiring harness # C51362 is only a fit for Curt brake controllers but you could use it if the Hayes controller you have has wires and a plug or just wires sticking out of the back. But if it just has a socket for a plug then you cannot. It looks like all of the current Hayes controllers, see link, do have wires and a plug sticking out of the back. What you would do is cut off the connector on the brake controller if present and remove the connector on the curt harness...
    view full answer...
  • Brake Controller Wiring Adapter for a 2015 Toyota Tacoma with Factory 7-Way
    No worries, the 5-wire harness will work just fine because the extra connection is for the illumination circuit and it's not needed. The Curt Discovery trailer brake controller # C51120 is a fit for your 2015 Toyota Tacoma and the direct fit pig tail adapter # C51362 you referenced is correct. You will simply plug the adapter # C51362 into your factory brake controller tow port and route the pigtail to the location of your choice so you can connect your brake controller # C51120. I...
    view full answer...
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  • 2010 Toyota Tacoma TRD Factory Tow Plug Location
    The picture you have provided is the correct factory plug available for a wiring harness for a brake controller. The white wire is the ground, and the blue wire is the brake output. It will be the only open plug to use under the driver side kick panel if you vehicle came with the factory tow option. The appropriate adapter harness to connect to the factory plug is the Curt Quick Plug Brake Control Adaptor Harness Item # C51362
    view full answer...
  • Troubleshooting Installation Of Plug-In Brake Wiring Adapter For 2006 Toyota Tundra
    The Curt Custom Wiring Adapter For Trailer Brake Controllers, Item # C51362, is a confirmed fit for your 2006 Toyota Tundra and your Curt Venture Trailer Brake Controller, Item # C51110. I looked over the installation details and the brake control harness is under the dash to the left of the steering column and is often taped to another harness. I would check to make sure you are plugging into the right harness for the brake controller. I am also attaching a link to an article and...
    view full answer...
    Image 1 for
  • Brake Controller Wire Functions for a 2003 Toyota Tundra
    If your 2003 Toyota Tundra came with a factory installed 7-Way trailer connector and you are using Curt brake controller # C51110 then you will need the proper wiring harness to plug it into your truck, # C51362. If your truck did not come with factory 7-Way and you are trying to hardwire in the controller then the black wire is 12 volt power to the controller, white is the ground wire, red is input from the cold side of the brake switch, and blue is output to the trailer brakes. I have...
    view full answer...
  • Wiring Adapter to Install a Curt Discovery Electric Brake Controller in a 2005 Toyota Tundra
    The Curt Wiring Adapter # C51362 is what you need to install a Curt Discovery Electric Brake Controller # C51120 in your 2005 Toyota Tundra as long as the truck has a factory 7-way trailer connector.
    view full answer...
  • Curt TriFlex Trailer Brake Controller Shows dc with Trailer Connected to 2012 Toyota Tundra
    The dc does indeed mean that the controller is not sensing the trailer on the Curt TriFlex brake controller # C51140. This could be happening if the gain is set too low on the controller. Trying adjusting the power output and make sure the controller is mounted within the range specified in the instructions because not being level or straight can affect it. The Tundra also has an issue with an inadequate ground for a brake controller at the factory connection point for wiring harness #...
    view full answer...
  • Are Circuit Breakers Needed to Install the Curt Triflex Controller with the Wiring Harness # C51362
    Yes, when you installed the Curt Triflex Brake Controller # C51140 by using the Curt Custom Wiring Adapter # C51362 you took care of the installation completely. The circuits that are used on your vehicle wiring that the # C51362 connected to are protected with fuses so everything is good to go. I attached an install video for the # C51362 for you to check out also.
    view full answer...
  • Location of Brake Controller Connector on a 2014 Toyota Tundra
    I believe that the photo you sent in is of the OBD-II port on your 2014 Toyota Tundra. This is useful if your vehicle is throwing codes but it is not used for the brake controller. As long as your Tundra has the factory 7-Way at the rear of the truck then the Wiring Adapter # C51362 is the correct part for you to install the Curt TriFlex Trailer Brake Controller # C51140. Try looking to your left behind the side kick panel next to your emergency brake pedal. I have attached both a photo...
    view full answer...
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  • Parts Needed to Install Brake Controller on 2013 Toyota Tundra with Factory Tow Package
    The only thing you'll need to install the Curt # C51140 TriFlex brake controller on your 2013 Toyota Tundra is the # C51362 vehicle-specific brake controller wiring harness. As long as the vehicle is equipped with the factory tow package, you won't need anything else. The TriFlex controller includes the necessary bracketry and hardware for installation. The factory tow package connector that the harness plugs into is located to the left of the e-brake pedal, above the kick panel as shown...
    view full answer...
  • Compatibility of Curt C51140 TriFlex and Installation on 2014 Toyota Tundra
    The Curt # C51140 TriFlex brake controller would be a great choice for your 2014 Tundra. The TriFlex is a proportional controller that automatically levels, is compatible with both electric and electric over hydraulic trailer braking systems and can handle trailers with up to 4 braking axles. The connector for the brake controller will be located to the left of the e-brake pedal up above the kick panel as shown in the linked video and the photo I provided. In rare occasions, it's located...
    view full answer...
    Image 1 for
  • Trailer Brake Controller For 2010 Toyota Sequioa With Factory Tow Package
    To connect the Curt Spectrum Trailer Brake Controller # C51170 to your 2010 Toyota Sequoia with the factory tow package you will need the Curt Custom Wiring Adapter # C51362. This will allow you to plug into the factory connector located behind your dashboard making the controller a plug and play connection.
    view full answer...
  • Which Install Harness to Install Curt Spectrum in 2003 Toyota Sequoia
    The correct install harness is the part # C51362 to install the Curt Spectrum part # C51170 in your 2003 Toyota Sequoia.
    view full answer...
  • Help Finding Brake Controller Install Port on 2018 Toyota Sequoia
    On your 2018 Toyota Sequoia the factory brake controller plug is located underneath and to the left of the steering column, taped to another harness near the emergency brake pedal. There will be a 5-pin connector that mates with the one on harness # C51362. I have linked a video showing this harness being installed on an older Sequoia to show you the general location and what it looks like. You may have to remove the kick panel next to the emergency brake pedal and it could be tucked up...
    view full answer...
    Image 1 for
  • Parts Needed to Install Curt C51170 Spectrum Brake Controller on 2007 Lexus GX470
    For a 2007 Lexus GX470 with the factory 7-way installing the Curt # C51170 Spectrum brake controller would be a plug and play installation. Other than the # C51362 brake controller wiring harness, no other parts would be needed. The connector for the brake controller is located under the dash near the top of the emergency brake pedal.
    view full answer...
  • Recommended Brake Controller Wiring Harness For 2013 Toyota Tundra
    If your 2013 Toyota Tundra has the factory 7-way installed, the Curt Custom Wiring Adapter, part # C51362 will be what you need to connect the Curt Discovery Trailer Brake Controller, part # C51120. If you have a 4-way connector installed on your Tundra, part # C51515 is what you need. This harness is used on a vehicle that does not have a factory tow package or on one that has a brake control harness but is not equipped with a plug-in port. If your vehicle doesn't have a factory tow...
    view full answer...
  • Troubleshooting Curt Tri Flex Brake Controller Installation on 2008 Toyota Tundra
    According to my Curt Representative, two things can cause the RC error code to come up frequently. Either there is a loose wire connection somewhere in the brake output circuit (the blue wire that connects the brake controller to the trailer connector and on to the trailer brake magnets) or the brake controller is defective. I'd suggest using a circuit tester like part # 40376 on the blue wire directly behind the brake controller. With the trailer unplugged, the draw from the light on the...
    view full answer...
  • Will Curt Assure Brake Controller Be Smoother than Escort Brake Controller
    The Curt Assure brake controller part # C49UR when properly set up will be incredibly smooth unlike what you have now. This controller has an inertia sensor that can tell how hard you are applying the vehicle brakes and applies a proportionate amount of braking pressure on the trailer brakes. To install it in your 2012 Toyota Tacoma you'd just need the install harness part # C51362 which plugs in under the dash.
    view full answer...
  • Recommended Trailer Brake Controller for 2016 Toyota 4Runner
    I'd be pretty wary of using velcro or tape to install a brake controller. If it should come loose and fall without you noticing, the controller would not work correctly and could put you in danger. I've heard of folks that used 2 sided tape to install the controller and had the controller come loose from the dash when they went to use the brake override switch, so I'd recommend installing it by mounting it to the dash as explained in the instructions. The holes needed to mount the controller...
    view full answer...
  • Will A Curt Discover Brake Controller Work in a 2016 Toyota 4-Runner
    Yes, your Curt Discovery Brake Controller # C51120 is compatible in 2016 Toyota 4-Runner. The Curt Custom Wiring Connector # C51362 will be the connector that you will need to install the brake controller in your 4-Runner. If needed, I recommend a replacement mounting bracket for the Discovery Controller # C51124.
    view full answer...
  • Parts Needed to Install Curt Venturer Brake Controller in 2004 Toyota Tundra with 7-Way
    To install the Curt Venturer part # C51110 in your 2004 Toyota Tundra will require the install harness part # C51362.
    view full answer...
  • Recommended Trailer Brake Controller Harness for 2008 Toyota Tundra and Curt Brake Controller
    For your 2008 Toyota Tundra, I recommend you swap out your 5 wire harness for the Curt Custom Wiring Adapter for Trailer Brake Controllers # C51362. This will allow you to simply plug in your Curt Venturer Trailer Brake Controller # C51110. Your other option is to hardwire your controller. The Curt controller has the standard wiring of blue (brake controller output), black (power in), red (brake light switch cold side connection), and white (ground). You can use a circuit tester like...
    view full answer...
  • Where to Mount Curt TriFlex Brake Controller on a 2016 Toyota 4Runner
    I am going to start with the easy part of your questions if you don't mind! For the Curt brake controller you have the wiring harness needed to plug it into your 2016 Toyota 4Runner is # C51362. As far as placement I have seen the interior of the 2016 4Runner and like you said there is almost no free space! But it looks like to the right of about where your right knee would be there is a vertical space in the center console that appears to be directly in front of the emergency brake lever....
    view full answer...
  • How to Access Vehicle Brake Light Signal for Trailer Brake Controller Installation
    If your 2005 Toyota Sequoia has a factory-installed 7-way trailer connector you can install the Curt Discovery trailer brake controller # C51120 using only the mating wiring adapter part # C51362. If it does not then the installation will be hardwired. You can gain access to the vehicle brake light signal, which is what triggers the Discovery controller to generate output voltage for the trailer brakes, either by tapping into brake light wiring or by installing a fuse tap in the brake...
    view full answer...

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Info for this part was:

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Written by:
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Expert Research:
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