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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 # C51436
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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 vehicle's dash. 1-800-496-5010 to order CURT accessories and parts part number C51436 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 (58)
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CURT Accessories and Parts - C51436

  • 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 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 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 port on your vehicle's built-in brake control wiring harness. For most applications, this harness is located behind the dash.

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.

51436 Curt Quick Plug Brake Control Adaptor Harness

Installation Details C51436 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In - C51436

Average Customer Rating:  4.9 out of 5 stars   (58 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.

2014 Ford F-150

Adapted Curt brake controller for my 2014 Ford F150 STX without any problems. Just find your Ford brake control connector behind the coin slot on the left side of the dash and plug it in.

After a year of using the Curt brake controller it has been by far the best one of several I have used and installed. i highly recommend the controller.
Tommy J - 01/31/2015

2010 Ford F-150

The cable assembly made installation quick and easy, all I had to do was locate the Ford supplied connector in my F150. The cable assembly supplied by Curt plugs into the Ford provided connector. Plug the opposite end of the Curt supplied cable into the controller and the electrical installation is complete. Note: the Ford supplied connector has a protective cover on it, you have to remove this cover before this Curt connector will plug in.


Good price, quick delivery and it fit like a glove.


Plugged right in and working perfectly

Working perfectly
Keith M - 01/06/2022

2009 Ford F-150

The Curt wiring adapter for my 2009 Ford F-150 plugged into the controller and the truck connector under the dashboard exactly as it should have. It works great.

2016 Ford F-150

This pigtail that Dan T. with e-trailer help me get order an shipped worked perfectly. It was a custom fit for 2016 F-150 w/ no tow pkg and a Curt 51120 brake controller. This will almost complete my conversion of my truck that had no tow pkg. In the end it will help my daughter tow her Shooting S barrel horse safely to the shows. Thank you Dan T.


Work great I like how all you see is the small knob looks more OEM


I purchased the C51436 adapter to install the C51130 trailer brake controller in my 2010 Ford pickup. Everything worked as stated. Good products from a good company with quick service.

I am very happy with all of my purchases from etrailer. The products are still working fine after a year and your company is very good to work with. Any future needs I have will be purchased at etrailer.
Larry M - 02/08/2018


Just as described. With truck specific wiring harness, installation was simple. Highly recommend!

perfectly satisfied
John Y - 02/19/2018


Exact fit could not be easier


Great item. Made the controller plug and play.

2013 Ford F-150

Etrailer provided outstanding information regarding the technical details of the product along with easy to understand installation instructions. The brake controller provided a cost effective solution for my basic requirements. The installation was a "snap", the only time consuming task was determining the optimal location/position install the brake controller. Item was installed in a 2013 Ford F150 and I use it on a dual axle trailer for hauling a compact Kubota tractor.

2012 Ford F-150

Excellent - no hesitation in making that evaluation

I bought a brake controller, interface cable for the F150, and the 7 pin plug that goes on the back bumper. All items are great quality. Parts arrived as expected with shipping as paid for. I am installing the equipment, but don't have any issues. There were no installation instructions, however these are available on line line detail. I do not expect any operational probems but am a few days from making that test.

2009 Ford F-150

Researched, purchased and installed a hitch and brake controller for my 2009 F-150. It was so much easier using etrailer. I have recommended them to several friends for their towing needs.

2012 Saturn Relay

Made install easy. I ran my own 12 ga wire to 7 pin connector for trailer brakes. I couldnt find the fuse and or relay needed for my 2011 F150 to complete factory circuit. I NEEDED the trailer the next day with a 3,000 lb tractor on it. Worked well.


Installing and using the Curt trailer brake controller was simple and worked perfectly. I Can say the same about the customer service at etrailer. And will certainly be using them both


Super easy to use, makes installing controller a snap

2015 Ford F-150

Exactly what I needed. It worked great and arrived in 3 days right before an 1600 mile trip. It plugged right into my trailer brake harness and was easy to install. Took me less than a minute.


Plug and play, works as expected.


easily connected

2015 Ford Flex

This adapter from my Curt brake controller to my 2015 Ford Flex was a perfect match. Thank you very much!


Product was delivered on time as stated. Had a few issues on my end that tech walked me thru. Easy connection, working great. Thanks etrailer for all you do.

2014 Ford F-150

Great part. Works perfect with my 2014 f150 and curt brake controller.


Web site was very helpful in choosing products I needed. Everything arrived in few days,installed with no problems and worked perfectly


The cable was easy to install. Made the brake controller installation seemless.

Show More Reviews

See what our Experts say about this CURT Accessories and Parts

  • Where is Brake Controller Adapter on 2010 Ford F-150
    On your Ford 2010 F-150, the harness location should be located under the dash, above the brake pedal and taped to another harness. If you have the shifter in the center console of your F-150 it will be located under the center console. I have attached an installation video which will walk you through the installation process.
    view full answer...
  • Curt Brake Controller and Wiring Harness for a 2015 Ford F-150
    For a Curt Discovery brake controller # C51120 you will need wiring harness # C51436 for your 2015 Ford F-150. I have linked video reviews for both parts for you.
    view full answer...
  • Where Does Wiring Harness for Curt Venturer Connect to in Cab of 2016 Ford F-150
    The Curt Venturer Brake Controller # C51110 installs with the wiring harness # C51436 behind a panel in your 2016 Ford F-150's dash counsel. The panel you will need to remove in just to the right on the steering wheel. See the video I've attached and skip ahead to about the 2:30 mark to see the panel. From their the video will show you the rest of the install.
    view full answer...
  • Which Curt Brake Controller Adapter Fits a 2015 Ford F-150
    The Curt adapter, part # C51436, fits your 2015 Ford F-150. It plugs into the factory connector under your truck's dash and fits most Curt brake controllers, like the Venturer part # C51110. I've linked a video of a controller being installed into a 2013 F-150 using the # C51436 adapter.
    view full answer...
  • Can Same Harness be Used when Switching From Curt Time Delayed to Curt Proportional Controller
    To replace the existing trailer brake controller on your 2009 Ford F-150 with a Curt proportional unit, such as the Curt TriFlex # C51140, you can indeed use the same Plug-In Adapter part # C51436 that you used before. You will just need to unplug your old unit and plug the adapter end into the new Curt controller. The TriFlex is a really nice, proportional controller that will activate the trailer brakes at the same time and with the same intensity that you apply to them in your F-150....
    view full answer...
  • Location For Brake Controller Adapter # C51436 To Plug Into On 2010 Ford F-150
    On your Ford 2010 F-150, the harness location should be located under the dash, above the brake pedal and taped to another harness. I have attached a photo that shows the typical location for the harness location on your truck. If you have the shifter in the center console of your F-150 it will be located under the center console. I have attached the installation instructions for the Curt Custom Wiring Adapter, part # C51436. The instructions show the typical installation locations for...
    view full answer...
    Image 1 for
  • Installation of Curt Venturer Brake Controller # C51110 in 2011 Ford F-150
    Your 2011 Ford F-150 has a quick-connect port under the dash to allow for convenient plug-in installation of a trailer brake controller. The harness part you referenced, part # C51436, provides this connection instead of forcing you to hard-wire the unit. Your harness may be pinned out incorrectly for your 2011 F-150. Please refer to the linked article which explains the correct pin assignments for the harness you have. It may just be necessary for you to relocate the ground and brake...
    view full answer...
  • Brake Controller Install Harness for Curt Triflex to Install In 2017 Ford F-150
    The correct brake controller install harness you need for your Triflex part # C51140 to install in your 2017 Ford F-150 is the # C51436.
    view full answer...
  • Curt Brake Controller Adapter For 2019 Ford Expedition
    I am happy to help you install the Curt Triflex part # C51140 in your 2019 Ford Expedition with a factory 7-way. I recommend to use Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51436 to install the brake controller. It will plug into a built-in port under the dash of the Ford and the other end plugs into the brake controller to power the brake output circuit on the 7-way to tow a trailer with brakes.
    view full answer...
  • Where Does Brake Controller Plug in on 2016 Lincoln Navigator
    Yes, that's correct. To install the Curt Spectrum, part # C51170, or any brake controller you can use a custom harness to just plug it in. The harness is part # C51436. We don't have a video that shows the location of the connector but it's too the right of the steering wheel.
    view full answer...
  • Parts Needed to Install Curt Venturer Brake Controller in 2018 Ford F-150 with 7-Way
    To install the Curt Venturer brake controller part # C51110 all you need is the install harness part # C51436 that you referenced. This plugs into the port on your controller under the dash and then into the connector of the Venturer. You would not need to flash the computer of the truck either.
    view full answer...
  • Should Curt Spectrum Brake Controller Show Lights on Display When Connected to Truck
    With a trailer disconnected the Curt Spectrum part # C51170 that you referenced should have the outer two lights flashing blue at idle or solid blue when the brakes are on. Since you used the correct install harness for this controller in your 2010 Ford F-150, part # C51436 you most likely have a blown fuse under the hood of the truck for the brake controller circuit. That would be only thing that would kill the circuits that power the controller.
    view full answer...
  • Curt Brake Controller Wiring Harness for 2018 Ford F-150
    Curt replaced the 51437 with the # C51436 which fits a 2018 Ford F-150 (among other Ford vehicles) and is compatible with the # C51120 Curt Discovery brake controller.
    view full answer...
  • Brake Controller Recommendation and Install for a 2014 Ford F-150
    If you have a factory 7-way connector at the rear of your 2014 Ford F-150 I would recommend the Curt Brake Controller part # C51140 and the install harness part # C51436. These two parts will make installation very easy as the harness plugs into the controller and then the other end plugs into the port under your dash. If you have a factory 4-way connection at the rear of your vehicle you will also need the part # 37185 to complete the install. Check out the FAQ article to the right for...
    view full answer...
  • How Does Brake Controller Install in 2012 Ford F-150
    When installing the Curt Discover part # C51120 with the harness for your 2012 Ford F-150, part # C51436 all you'd have to do is plug in the controller and harness and you'd be set if you have the factory 7-way like it sounds like you do. It's really a pretty simple install. Otherwise you'd need a 4-way to 7-way adapter like part # 37185 and you'd have to run the wire from the truck's frame rail to the adapter and you'd be set. See attached picture for more info on that.
    view full answer...
    Image 1 for
  • Plug-In Wiring Harness For Curt Assure Brake Controller in 2021 Ford F-250 w/ Factory 7-Way
    There is indeed a plug-in wiring harness for your 2021 Ford F-250 with the factory 7-way that will allow you to use the Assure brake controller; the correct parts for your truck are the following: - Curt Assure Trailer Brake Controller # C49UR - Curt Custom Wiring Adapter for Trailer Brake Controllers # C51436 This is a really nice choice for a brake controller for your F-250 because it it has a bright, easy to see OLED screen, continual diagnostic checks with safeguards to prevent battery...
    view full answer...
  • Recommended Out of the Way Brake Controller for 2009 Ford F-150 With Factory 7-Way
    The Curt TriFlex Trailer Brake Controller # C51140 with Wiring Adapter # C51436 is a very good option for your 2009 Ford F-150, though to mount it you will need to use the included mounting bracket and screw it in under the dash. If you (understandably) don't want a brake controller unit in the cab of your F-150, you do have a great option I recommend checking out, the Curt Echo Mobile Trailer Brake Controller # C51180. The Echo is the best option because it will simply plug into the...
    view full answer...
  • Brake Stoplamp Switch Wire Color For Brake Controller Install on 2016 Ford F150
    You'll be looking for a purple and white wire, but if you're wanting to install a brake controller there is a plug and play option that would require no cutting or splicing. If you look at the installation video I've linked for you, you can see that the brake controller connector is located behind the dash, all you'll need is the correct wiring harness to connect the controller and the vehicle and you'll be good to go. If you're using a Curt brake controller like the # C51120, you would...
    view full answer...
  • Which Curt Install Harness Is Used to Install Venturer in a 2020 Ford F-53
    The brake controller install harness for a Venturer # C51110 in a 2020 Ford F-53 chassis is the part # C51322.
    view full answer...
  • Troubleshooting Curt TriFlex Brake Controller Keeping Motorhome from Turning On
    If your motorhome has the 2015 Ford F-450 cab and chassis that you input for your vehicle info then the Wiring Adapter # C51436 is the problem. You should actually be using the Wiring Adapter # C51432 for your TriFlex # C51140 instead. When I spoke with my contact at Curt he said that for the Ford pickups if the wrong adapter is used then it does something to the anti-theft and keeps the vehicle from starting.
    view full answer...
  • Troubleshooting Curt Triflex Brake Controller that Won't Power On Installed on 2018 Ford F-150
    The install harness part # C51436 is the correct harness to install the Curt Triflex part # C51140 in your 2018 Ford F-150. What I would do is verify the controller wiring has power on the black wire as this is the power circuit for it. You'd want to use a circuit tester like part # PTW2993 for this. If there is no power there then check under the hood for a blown fuse for the brake controller power circuit. If there is power there then you most likely have a bad brake controller as with...
    view full answer...
  • Hardwiring in a 7-Way Trailer Connector and Brake Controller on a 2018 Ford F-150 w/Factory 4-Way
    I did some checking and right now, in order to add a 7-Way trailer connector to your 2018 Ford F-150, you will need to use our hardwire kit # ETBC7. The factory brake controller wiring harness might be in place but if it is for sure and if that means you can install the Ford brake controller I cannot answer. I am sure you can though because I know in other Ford F-150s you can. Or you could install an aftermarket brake controller using wiring harness # 22292 and a Tekonsha brake controller....
    view full answer...
  • Can a P2 Trailer Brake Controller from a 1998 Ford F-150 Be Used in a Rental 2012 Ford F-150
    The 1998 Ford F-150 and 2012 F-150 do not use the same wiring harness (a 2012 would use # 22292). Because you would have to put holes in the dash of the truck to mount the controller, it is probably not something the rental place will let you do. But if they allow you to or can find a factory screw to mount the controller mounting bracket to then it could work. Another option is to use the Prodigy RF, # TK94FR, which mounts on the trailer so you will not have to modify the rental truck...
    view full answer...
  • Installation of Brake Controller and Brake Controller Wiring to Added 7-Way in 2018 Ford F-150
    For your 2018 Ford F-150 I don't recommend the Curt Venturer brake Controller # C51110 but it will install in the same way as any other brake controller and for that installation you have a couple different options. If when you installed the 7-way you grabbed the factory wiring for your 12V and brake controller from near your driver's side wheel well, then I recommend using the wiring harness # C51436 which will connect to the factory port under your dash. Some models don't have the brake...
    view full answer...

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