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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 # C51455
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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 behind your 's dash. 1-833-496-1390 to order CURT accessories and parts part number C51455 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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  • Reviews (46)
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2017 Toyota Tundra - 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 behind your 's dash.


  • Plug-in wiring adapter allows for quick, simple installation of your electric trailer brake controller
  • No cutting or splicing required
    • Custom connectors plug into the built-in port behind 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 connector behind your vehicle's dashboard. 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 of your dashboard.

No hardwiring is required to install this adapter. After you plug it into the 2 factory ports, 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.

51455 Curt Quick Plug Brake Control Adaptor Harness

Installation Details C51455 Installation instructions

California residents: click here

Customer Reviews

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In - C51455

Average Customer Rating:  4.9 out of 5 stars   (46 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 behind your vehicle's dash.

2017 Toyota Tacoma

VERY easy install. As mentioned in other reviews the hardest part is finding the factory plug in for a 2017 Tacoma. Toyota tucked it way in the back behind a wire bundle. Picture attached for reference.

Toyota Tacoma

I bought this connector for my new Toyota Tacoma after moving the Brake Controller from my traded in Jeep. I had hardwired the Jeep, but this was a direct connector and was much, much easier to install. The Curt brake controller and this cable make an excellent combination to control the brakes on my Casita. The only flaw is that Toyota hides the factory end under the upper left side floor-well cover and was hard to find. Not etrailer's fault. Also, I have bought several items from etrailer and the customer service is always superb, as are all of the item descriptions and videos on the products they carry. Great place to get what you need for your vehicle.

2015 Toyota Tundra

I purchased an adapter to go between my brake controller and the factory wiring in my 2015 Tundra (C51455), I have not installed it yet. I will review it when it is installed.

The wiring adapter I purchased worked perfect and the install was simple, thanks
Dave - 07/29/2016


Parts were right, the web site helped to install. Great all the way around. Thanks.

2017 Toyota Tacoma

I picked this Curt brake controller As it is specifically wired for my 2017 Toyota Tacoma which already has the tow package. When I finally found where to hook it up in my truck I realized I needed C51455 part which is the female end .. they gave me another 15 inches of extra wiring so I can mount the controller by my right leg as I drove.. and the great thing about this experience I called on a Sunday afternoon got a hold of A person ( Shawn B) Who was very helpful and knew exactly which part I needed .
I highly recommend using e trailer


The hardest part of the job was finding the pre-installed connector on the Tacoma. It is tucked in behind a wire bundle so you have to know where to look. Once found, simple plug and play.

Works very well.
Pat V - 08/03/2020

2017 Toyota Tundra

I grabbed this cable to connect my Curt Spectrum brake controller to my 2017 Toyota Tundra tow package cable. Worked great. The Tundra cable was located immediately behind the panel to the right of the steering wheel with the auto LSD button and Tow/Haul button (if equipped). My truck had a blank instead of tow/haul button.

Toyota Tacoma

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.

2013 Toyota Highlander

As alway, etrailer had exactly what I needed to do the job simply, effectively, and as the best price. What more can you ask for?

Kevin - 09/06/2016

2021 Toyota Tacoma

Needed wire to connect to my 2021 Toyota Tacoma


Was very easy to install with the vehicle specific wiring harness, took it for a short test drive with my 19 ft Scamp Camper and it works as it should

2015 Toyota Tundra

arrived before I expected. Finding the prewired brake plug on my 2015 tundra was a pain. This wiring adapter made it possible to complete the job.

2015 Toyota Tundra

Same review as the controller. Just plug and go. EXTREMELY easy. I had my 7 year old daughter with me and she could have basically hooked it up. She is as anxious to go camping as I am!

Toyota Tundra

Ordered my brake controller for my tundra and it worked great. I had already been to a local store that kept providing me the wrong part so I took the time to research and this was exactly what I needed.

2016 Toyota Tacoma

As and accurate. My "go to" company for everything to do with trailers or towing!

2015 Toyota Tundra

Product arrived on time. There was a hiccup on the item I initially ordered. They sent me a notice that it was unavailable, but I called them back and found me these comparable items for my 2015 Tundra. Items worked great and plugged right in, as well as wounted well. Overall great experience.

Toyota Tundra

Easy install & a clean factory look in my ‘15 Tundra. Looking forward to getting a trailer hooked up to get it dialed in.


Fit petfectly


great site, i was able to select my vehicle and get the right adapter!!!!


Packaging was damages but all parts were accounted for and in great condition. Very happy with the purchase.

2016 Toyota Tundra

Plug and play. Has worked flawlessly for the last year thank you guys


Excellent service and quick delivery. Other reviews made my purchase easy. Will definitely use etrailer again

2016 Toyota Tacoma

Took about 5 minutes for me too install check with my dealers and they was going to charge me about $350 for parts and labor


Service was very good. Received my order on time. The installation was straightforward.


I like the installation photos provided in the Q&A section. Fast shipping.

Show More Reviews

See what our Experts say about this CURT Accessories and Parts

  • Wiring Adapter for Curt Brake Controller in 2016 Toyota Tacoma
    We do have a wiring adapter for your Curt brake controller that will work in your 2016 Toyota Tacoma, though adapter 51382 does not work with a Toyota, only certain models of Nissan, such as your Frontier. Instead you need the Curt Custom Wiring Adapter for Trailer Brake Controllers # C51455 which does fit your '16 Tacoma.
    view full answer...
  • Where Is The Trailer Brake Connector Plug On 2021 TRD Off Road Tacoma?
    Sometimes it's hard to find the wiring as they are sometimes taped up and out of the way. I've included a picture of the instructions to help you find the right spot. The connector should be on the back side of the vehicle harness. That's probably why you aren't seeing it. I've found that they are pretty neatly tucked behind the wires so it takes some looking to find it. When you do find it, you can use this adapter # C51455 for your brake controller.
    view full answer...
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  • Does Curt Brake Controller Install Harness # C51455 Fit 2018 Toyota Tacoma
    The Curt brake controller install harness part # C51455 fits several Toyota vehicles including your 2018 Toyota Tacoma. Sorry for any confusion!
    view full answer...
  • What is Easiest Brake Controller Solution for 2020 Toyota Tacoma without Factory Tow Package
    The Curt brake controller install harness part # C51455 does fit your 2020 Toyota Tacoma without the towing package and most likely will require additional relays and fuses for activating the brake controller circuit of your truck but you'd only be able to get those from a Toyota a dealer. An easier option though is to use the Curt Echo Mobile brake controller # C51180 which only needs to plug into an active 7-way and once synced to your smart phone is ready to tow without any additional...
    view full answer...
  • Is There a Harness To Install Curt Spectrum Brake Controller On 2019 Toyota Tacoma
    In order to install the Curt Spectrum Trailer Brake Controller part # C51170 on a 2019 Toyota Tacoma on a you'll need to use the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51455. The plug that this adapter harness will attach to will be rectangular in shape with four pins inside. In regards to hardwiring, it for one does not sound like you have the correct plug but that said you'd need to test the pins anyhow as I wouldn't have any sort of pin out diagram to go off of.
    view full answer...
  • Easy to Install Brake Controller Recommendation for 2018 Toyota Tundra
    While we don't have a brake controller solution for your 2018 Toyota Tundra with a factory 7-way that attaches to the factory brake controller port under the dash of the truck I can set you up with an easier to install option than that which is also one of the best performing brake controllers out there. So the easiest to install brake controller that also works really well is the Curt Echo Mobile part # C51180. Basically this just plugs into an active 7-way and once you sync it to your...
    view full answer...
  • 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 of...
    view full answer...
    Image 1 for
  • Trailer Brake Controller Connector Location on a 2018 Toyota Tundra
    According to Curt you can use the Adapter # C51455 on your 2018 Toyota Tundra for one of their brake controllers like the Spectrum # C51170 which uses a control knob and colors that resemble other knobs that are in modern vehicles. When they installed a brake controller using this adapter on a Tundra they actually found the connector hidden behind the panel to the right of the ignition that has the traction control and tow haul buttons on it. I have attached a link to the instructions...
    view full answer...
    Image 1 for
  • Brake Controller Install Harness Recommendation for 2018 Toyota Tundra
    The Curt brake controller harness part # C51455 is the correct brake controller install harness for a 2018 Toyota Tundra. One end plugs into the connector under the dash of the truck and the other end into a Curt brake controller like the part # C51520 that you referenced.
    view full answer...
  • Recommended Plug In Wiring Adapter To Install Curt TriFlex C51140 In 2018 Toyota Tundra
    The Curt TriFlex Trailer Brake Controller # C51140 you were looking at can simply be installed in your 2018 Toyota Tundra using the Curt Plug-in Wiring Adapter # C51455 you mentioned. This harness will plug directly into the factory trailer brake controller port underneath the dash of your Tundra and will NOT require splicing into the factory wiring in any way. I included videos of the products mentioned for you to take a look at.
    view full answer...
  • Does the Curt Spectrum Brake Controller Come with a Wiring Harness for my 2019 Toyota Tacoma
    I can understand why this might be frustrating. When it comes to installing the Curt Spectrum # C51170 in your 2019 Toyota Tacoma, you can hardwire the controller in to the vehicle and no additional parts or wiring are required. For this reason, the Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In # C51455 adapter isn't a required part to complete installation; it's more of a convenience to use than a required part. These adapters are also vehicle specific, which...
    view full answer...
  • No Trailer Brake Controller Plug Under Dash On 2018 Toyota Tundra
    The 2018 Toyota Tundra was a bit of an oddity as there are several reported instances of models not coming equipped with the factory trailer brake controller plug under the dash for use with an aftermarket brake controller as the years before did. There are also some 2018 models that do indeed have this and it seems to be hit or miss. I don't have an answer to why that is but I do have a solution for you to install any aftermarket trailer brake controller like the Curt TriFlex Trailer Brake...
    view full answer...
  • Replacing Factory Brake Controller on 2018 Toyota Tundra
    The problems you are having with the factory brake controller on your 2018 Toyota Tundra, as you mentioned, are not too uncommon. This is really the case with most factory brake controllers regardless of the truck make or model, as many customers choose to replace it with an aftermarket unit as soon as they get a chance. Before doing so I do recommend talking with a local Toyota dealer to see if anything needs to be done after unplugging the factory unit as it's possible the computer...
    view full answer...
  • Where to Find Brake Controller Install Port on 2017 Toyota Tacoma
    If you check out the attached picture you can see where the brake controller install harness is found on a 2017 Toyota Tacoma like yours. You have to remove the panel to the right of the steering wheel. I attached a picture of a review that a customer left that details where they found their connector on a 2017 Tacoma just like yours as well.
    view full answer...
    Image 1 for
  • Difference Between Proportional Brake Controller and Time-Delayed Controller on 2018 Toyota Tundra
    The difference between a proportional brake controller and a time-delayed brake controller is that a proportional controller is pretty simple. A time-delayed controller like the Curt Discovery # C51120 will apply your trailer brakes each time you press the brake pedal in your 2018 Toyota Tundra; it is called time-delayed because there is a slight delay from the time you press your Tundra's brakes to the time the controller reaches max power output. A proportional brake controller like...
    view full answer...
    Image 1 for
  • What Parts Do I Need To Install A Curt Spectrum Brake Controller On 2019 Toyota Tacoma
    The Curt Spectrum Trailer Brake Controller - 1 to 4 Axles - Proportional - Dash Mount, part # C51170, is compatible with your 2019 Toyota Tacoma. In order to install it you will need a wiring adapter kit. The Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In, part # C51455, is a custom fit for your vehicle. I have included product description links, a video demo link, and a video review link below.
    view full answer...
  • Will my brake Controller Settings be the Same When I add an Aftermarket Controller?
    They will be very similar. When adding an aftermarket controller like my favorite the Tekonsha Prodigy P3 Trailer Brake Controller - Proportional part # 90195 you will make the gain adjustments in a similar way and you will be able to set the boost depending on your trailers type so you will be selecting through like you did from the factory (trailer type) setting. After you install it set it where you had your factory controller and test it. If you don't quite remember what those are...
    view full answer...
  • Recommended Wiring Adapter for 2018 Toyota Tundra SR and Tekonsha Prodigy P3 Brake Controller
    At this time, Tekonsha doesn't have a custom brake controller wiring harness, but Curt does. I recommend making an adapter compatible with your truck using the Curt Custom Wiring Adapter # C51455 and the Pigtail Wiring Harness for Tekonsha and Draw-Tite Brake Controllers - 34" Long # 7894. This will give your the easy connection to your truck and your Prodigy P3 Brake Controller # 90195.
    view full answer...
  • Wiring Adapter for Curt Electric Brake Controller on 2016 Toyota Tacoma
    We do offer the Universal Wiring Adapter for Curt Trailer Brake Controllers # C51515. This adapter will connect with the plug on the back of the Curt electric brake controller on one end and the other end will allow you to hardwire install the brake controller. If you need to add a 7-Way to your tow vehicle, the # C51515 adapter will work well with the Universal Installation Kit for Electric Trailer Brake Controller # ETBC7. The instructions for this hardwire installation are linked for...
    view full answer...
  • How to Install a Brake Controller on a 2018 Toyota Tundra
    For starters, you are going to want to remove the three button panel to the right of the steering wheel and look for a white rectangular connector with four pins. If present this is present then we do have a plug-in option available for you in the Curt TriFlex Trailer Brake Controller part # C51140 with the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51455. If this plug is not present then your only option is to hardwire but the issue with this is obtaining the stop...
    view full answer...
  • Location of Trailer Brake Controller Connection Port on 2015 Toyota Tundra
    Current model Toyota Tundra trucks equipped with the factory 7-way trailer connector have their brake controller connector located behind the panel to the right of the ignition key that contains the Tow/Haul button, as you can see in the photo I've provided for you. You'll need # 3031-P brake controller wiring harness to connect a Tekonsha controller such as their P2 # 90885. If you are using a Curt controller like the Venturer # C51110 then instead you'll use harness # C51455.
    view full answer...
    Image 1 for
  • Installation Of Brake Controller On 2015 Toyota Tundra
    If you have the towing package and the factory 7-way at the back of your 2015 Tundra, the correct plug-in harness for your vehicle is the Curt TriFlex, part # C51140 is part # C51455. I have attached a photo of the location under your dash where the plug-in adapter will be connected to. I have attached an installation video for a brake controller on a Tundra that should be very similar to yours. If you do not have the factory brake control wiring harness port you will need to hard wire...
    view full answer...
    Image 1 for
  • Wiring Adapter Needed to Install Prodigy P3 from 2014 Toyota Tundra to 2018 Toyota Tundra
    Although the Prodigy P3 # 90195 can be used for your 2018 Toyota Tundra you will need to use the adapter # 3031-P instead of the current adapter # 3040-P that you used for your 2014 Tundra. Please note that as of right now (February 2019) Tekonsha has not confirmed this adapter to fit. This information actually comes from Curt who has their adapter # C51455 which fits a 2015 - 2018 Tundra. You should have a connector for the adapter but I do recommend checking out the linked photos from...
    view full answer...
    Image 1 for Image 2 for
  • Availability of Hayes Quick-Connect Brake Controller Adapter Harness for 2015 Toyota Tundra
    We do offer a Hayes brake controller wiring adapter for hardwired applications, part # HA81789-HBC, but for tow package-equipped trucks with an under-dash port only Tekonsha and Curt quick-connect adapters are offered. For any Tekonsha brake controller you can use part # 3031-P that you referenced; or for a Curt controller part # C51455. If you don't mind voiding the warranty on the harnesses you can buy two and splice them together. You can use part # HA81789-HBC along with # 3031-P;...
    view full answer...

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