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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 # C51322
Our Price: $23.38
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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 C51322 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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2006 Ford F-53 - 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. For most applications, this harness is located beneath the dash, near the center console.

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.

51322 Curt Quick Plug Brake Control Adaptor Harness

Installation Details C51322 Installation instructions

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In - C51322

Average Customer Rating:  4.8 out of 5 stars   (265 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.

1997 Ford F-350 Super Duty

They are the best at what they do. They found the parts I needed and got them to me the next day. I appreciate the dedication to their customers. This product worked for my 1997 Ford F350 with the factory-installed tow package.


Everything was as described. Easy easy installation in 10 minutes. Not the top of the line controller but it's all I need. Very fast shipping as well. Couldn't be more happy with etrailer. I will be purchasing my fifth through etrailer soon!


Great job came on time. Installed easily. Works great. Better still is the service from etrailer. New what I needed for my truck. Deserves repeat business


Plugged right in to my expeditions factory plug quick easy install.

Ford F-250 Super Duty

PERFECT. The employee (Roger R) that assisted me on my phone in order was fast, and efficient. He looked up my truck (2004 f250 diesel 4x4), and assisted me in ordering the exactly correct harness for my application. Plug and play. Thanks.


Excellent. Perfect fit, exactly what was needed. Connected the Curt C51110 Brake control to factory wiring. Only thing that could make it better is if it came with someone to plug it in for me and save me 10 seconds.

Mike R.


The products worked great up until about a few weeks ago Thats when I sold the truck where the items were installed. lol. Really though, I very much liked how the products listed and purchased from were easy to find, fit exactly as described, and performed as needed. is always one of the first places I look when searching for items for my new truck.


straight forward install, works as inte nded.


Exactly what I ordered and expected.


Worked perfectly


We purchased our new Ford Explorer with the towing package but the dealership said it didn't come with a trailer brake controller and nothing was made for our SUV so we would have to get an aftermarket controller and have them run the wiring. After looking online I found a video on and it was just as easy as the video to install, the hardest part was finding the Ford plug under the dash, very happy with this product and ready to haul our RV everywhere.


Wonderful product as well as wonderful customer service

2017 Land Rover Evoque

Made installation in a Land Rover Discovery Sport a breeze! Note: This option isn’t listed on either Curt or eTrailer, but it is absolutely an option if you have the factory installed OEM trailer tow package. Your factory tow package must be dealer activated in your vehicle’s software to use the quick connect harness shown here.

Total plug and play. Zero cutting, splicing or tapping required! Fantastic.

TIP: Select your model year and Land Rover Evoque (Shares the same chassis and tow electrics as the Discovery Sport) if you want the right part numbers for your quick connect options.


Perfect fit very easy to install


Works great in my 2000 f250


Made installation a snap. Just mount the break controller, plug one end into the vehicle's factory plug and the other end into the break controller.



Still working great

2003 Ford F-150

Plugged right in to my 2003 Ford F-150, and other end into the Curt Venturer brake controller. Worked great.



so far so good. no issues.

2004 Ford F-150

This is well worth the money. The cord ends appear to be high quality and fit the wiring connectors on the truck and brake controller perfectly. It makes hooking up your new Curt brake controller as easy as plugging in a cord. The only way to make this any easier is to have someone do it for you. The hardest part of the whole installation was finding the factory connector to plug this cord into. Hint: On my 2004 Ford F150, the brake controller connector was just above the factory diagnostic port underneath the dash.

2010 Ford Expedition

This cable made the job very easy. took 10 minutes to plug in and mount with Curt Venturer Brake Controller. Very inexpensive solution. This is an old vehicle (2001 Expedition) and didn't want to put a lot of money into a brake controller setup. These parts and directions from the website made it quick, easy and inexpensive. I have not towed with the controller yet.


After a little research by the etrailer team it was determined this was the correct cable for a 2013 Tiffin Allegro with a pre wired 7 pin plug to go itch the Curt controller. The team worked and researched and was great with customer service.


Nice trailer brake. Works as it should.

2010 Ford Explorer

Product worked liked a charm!! I have a 2010 Ford Explorer XLT, and the Curt brake controller with the factory adapter cable was a perfect fit!

Note: Even though it doesn't specifically say on the etrailer website, the adapter connector WILL fit a 2010 Ford Explorer that has a Factory Tow package installed. The factory connector is located next to the steering column underneath the kickboard. It is kinda of hidden away, but it's up and next toe the brake pedal switch connector.


Haven’t had a chance to install it yet but fast shipping

2004 Chevrolet Silverado

This plug does not work on my application but I will attempt to make it work.

Etrailer Expert

Patrick B.


This product is to be used with Curt brake controllers and specific Ford vehicles. If your brake controller is not Curt or your vehicle is not one of the proper Ford vehicles the connector will not work. We will be in touch in case we can help figure it out.


Wiring adapter and trailer brake controller work flawlessly. Took about 5 min to install.

Show More Reviews

See what our Experts say about this CURT Accessories and Parts

  • Curt Brake Controller Plug for a 2020 Ford Explorer
    Yes, the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51322 will allow you to use a Curt brake controller like the Curt Spectrum Trailer Brake Controller part # C51170 on a 2020 Ford Explorer (All Models). I checked with Curt just to confirm that the Curt Custom Wiring Adapter for Trailer Brake Controllers is indeed correct for a 2020 Ford Explorer so you can be confident this is the correct harness. The plug will be located under the driver dash, near the center console...
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  • Can I Install a Brake Controller in a 2015 Fleetwood Providence 42P?
    Yes, you can definitely install the Curt Spectrum Trailer Brake Controller item # C51170 in your 2015 Fleetwood Providence 42P. The question is whether or not you can use the Curt Custom Plug and Play Adapter item # C51322 to have an easy installation or use the Curt Universal Wiring Adapter item # C51515 to hardwire it in. Your Fleetwood Providence is built on a Ford F-53 chassis. If you have it, the brake controller port is located on the left hand side of one of the steering column...
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  • Parts Needed to Add 7-Way and Brake Controller in 2001 Ford F-150 with Factory 4-Way
    To install a 7-way in your 2001 Ford F-150 the correct part you need is the part # C55242 that you referenced which will mount with the bracket part # PK12711U you also mentioned. To install the Curt Venturer part # C74VV you also mentioned will require the # C51322 which plugs in under the dash of your truck. Check out the install video I attached for more info on this as well.
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  • Recommended Curt Wiring Harness for Brake Controller on 2003 Ford Explorer
    To make your Curt Venturer Brake Controller # C74VV able to function with your factory tow package you simply need the wiring adapter harness. For your 2003 Ford Explorer Eddie Bauer edition, that wiring adapter is the Curt Custom Wiring Adapter for Trailer Brake Controllers # C51322. On an Explorer that harness is behind the glove box on the passenger's side.
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  • Curt Brake Controller Display Not Showing Power in 2000 Ford F-250
    If the display on the Curt Venturer Trailer Brake Controller part # C74VV is not showing a display at all then it is not getting power from the vehicle battery. It looks like the 2000 Ford F-250 has a brake controller adapter part # C51322 which you are more than likely using. Even with the use of a brake controller adapter the truck may still need fuses and relays to activate the towing package. You will need two 30 amp maxi-fuses in the trailer tow electric brake and trailer tow battery...
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  • Installing Curt Brake Controller on 1994 Ford F-150 with Factory 4-Way Connector
    It sounds like your 1994 Ford F-150 has the factory 4-Way connector. If this is the case then to install your Curt brake controller like the TriFlex # C24VV using the adapter plug # C51322 you mentioned, you just have to add the 7-Way Adapter Harness # 37185. The factory wires to which the pigtail wires from the harness connect should indeed be located somewhere along the frame rail, most likely on the driver's side. The exact location can vary so the best route is to simply start back...
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  • Brake Controller and Install Harness for a 2013 Ford Explorer
    For installing the Tri-Flex brake controller part # C24VV in a 2013 Ford Explorer the correct install harness is the part # C51322. I confirmed this with Curt as a fit for your vehicle. he Ford Explorer and Mercury Mountaineer have 6-pin connectors behind the glove box on the passenger's side that this connector will install into.
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  • Parts Needed to Add 7-Way and Brake Controller to 2007 Ford F-150 with 4-Way
    If your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # 3035-P, the # 37185, and a brake controller. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well it works and how easy it is to set up. Follow the 4-way trailer connector wires from the trailer connector to the front...
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  • Curt Brake Controller, Wiring Harness 1999 F-350 Super Crew
    The Curt brake controller # C84VV can plug directly into your 1999 F-350 Super Crew using the proper wiring harness, # C51322. This harness is sold separately. I have included a link to a video to the right that shows where the connection point on a similar truck. The brake controller and harness are different in the video but they plug into the same place on the truck.
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  • Where to Get the Relay to Activate the 12 Volt Circuit on the 7-Way of a 2008 Ford F150
    The relay you need to activate the 12 volt power circuit of your trailer connector is available at your local Ford dealer. I wish we carried it so that you could get it from us but we do not. The correct harness to install the Curt Venturer Brake Controller part # C74VV in your 2008 Ford F150 would be the part # C51322. This harness will plug into the back of the brake controller and the other end will plug into the port under your dash near the center console.
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  • Will Brake Controller Plug-In Adapter C51322 Fit 2004 Ford Expedition And 2004 Ford E-350
    The Curt Custom Wiring Adapter, part # C51322 is designed to work with the # C74VV brake controller and will fit both of your vehicles if there is a factory trailer connector installed on the vehicle. If you have a 4-way connector on either vehicle then you will also need part # 37185. If your E-350 does not have a trailer connector you will first need to install a 4-way connector like part # 18252. You will then need part # ETBC7 to get a 7-way at the back of your vehicle. If there...
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  • Fit of Curt Venturer Time-Delay Brake Controller C51110 in RV Based on 2006 Ford F-53 Chassis
    Yes, the Curt Venturer Time-Delay Brake controller # C74VV and the matching wiring harness # C51322 are correct fits for your Damon RV that is based on a 2006 Ford F-53 chassis. This is a good economical brake controller, but if you want the best performance you may want to consider a proportional type unit like the Tekonsha Voyager, parts # 39510 and # 3035-P, that will slow your trailer right along with the motorhome's rate of deceleration. The linked article explains the differences...
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  • Wiring Harness for 2013 Thor Challenger With Curt Brake Controller
    For a Curt brake controller, the correct brake controller wiring harness for your 2013 Thor Challenger is the Curt Wiring Adapter # C51322.
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  • Does Curt Brake Controller Install Harness # C51322 Fit 2007 Ford F-150
    The Curt brake controller install harness part # C51322 that you referenced is a confirmed fit for your 2007 Ford F-150.This adapter plugs into the port on your vehicle's built-in brake control wiring harness. For most applications, this harness is located beneath the dash, near the center console. Most likely the mechanic you brought it to didn't know where to connect it. This would work well with the proportional Triflex part # C24VV.
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  • Does Curt Brake Controller Install Harness # C51322 Fit 2000 Ford F-53
    Yes, for your 2000 Ford F-53 RV chassis the Curt brake controller install harness part # C51322 is a confirmed fit and would work well. It would work really well with the Triflex part # C24VV.
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  • Where is Install Connector on 2014 Ford Explorer for Curt Brake Controller
    The correct install harness for a Curt brake controller in a 2014 Ford Explorer is the part # C51322. The harness you are looking for on your vehicle will be under the dash to the center towards the center console. I attached an install video that shows a different brand controller and harness installed in a 2013 Ford Explorer which will be the exact same process. Around the 10 minute mark is where the connector on the vehicle is found.
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  • Hooking Up Brake Controller to 1995 Ford F-250
    The process for hooking up a brake controller on your 1995 Ford F-250 is going to depend on if you have the factory 7-way, factory 4-way, or no factory connectors at all. For example, if you have the factory 7-way you would only need the brake controller and plug-in harness like the Curt Venturer NEXT Trailer Brake Controller # C74VV & Wiring Adapter # C51322. If you had the factory 4-way you would need to add a 7-way with the Curt Venturer NEXT Trailer Brake Controller # C74VV, Wiring...
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  • Plug-In Adapter Needed for 2009 Ford Explorer Sport Trac with Curt Venturer Brake Controller
    The correct brake controller wiring adapter for your 2009 Ford Explorer Sport Trac and the Curt Venturer Brake Controller, # C74VV, is the Curt Custom Wiring Adapter, # C51322. On the Sport Trac, the factory brake controller plug is behind the dash just above the left knee near the brake release. If your Sport Trac came with a tow package, then the plug should be active and all you will have to do is plug in and mount the brake controller and run through the setup as it is outlined in...
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  • Is The Curt Wiring Adapter Compatible w/ Hayes Energize III Trailer Brake Controller For 1996 F-350?
    The Curt Wiring Adapter # C51322 is compatible with the Hayes Energize III+ Trailer Brake Controller # HA81742B. Both the Curt and Hayes Adapters # HA81783-HBC utilize the same connectors allowing you to use it on your 1996 Ford F-350.
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  • Adding a Curt Brake Controller to a 1994 Ford Van
    If your 1994 Ford E-350 van came with a factory installed 7-Way trailer connector then all you will need is the brake controller and the proper wiring harness. For Curt brake controllers the wiring harness is # C51322. If the van came with a factory 4-Way then you will still use the same harness but the brake (blue) wire will need to be manually run from the brake controller back to the plug in the rear instead of going through the harness where it plugs into the vehicle. The brake controller...
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  • Curt Venturer Brake Controller Installed in 1995 Ford Pickup Wont Power Up
    If the correct wiring adapter is being used, part # C51322, then you most likely have a missing or blown fuse on the circuit that feeds power to the brake controller. Look in the power distribution box under the hood. The fuse the protects that circuit is in position 21, and it's a 30amp maxi-fuse. If the fuse is blown, you could have a short in your existing 7-way connector. If that's the case, you'll want to replace the trailer connector with part # 20023.
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  • Trailer Hitch & Brake Controller for 2005 Ford F-150 w/ 4-Way & No Factory Hitch for Heavy Trailer
    We can get your 2005 Ford F-150 with a 4-way set up with a trailer hitch receiver and brake controller so you can tow your trailer. Since your truck does not have a factory hitch, and you need to tow a heavy 7,000 lb trailer, the hitch that will fit and has the needed capacity is the Curt Trailer Hitch Receiver # C14357. This is a Class IV hitch with a 10,000 lb towing capacity, which is the most available for your F-150. As for the brake controller, since you already have a 4-way, in...
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  • How to Connect Brake Controller and 12V Power Wiring Connections for a 1998 Ford E-350
    Before I get into the wiring itself I do want to make sure you've looked in the correct location for the OEM wiring on your 1998 Ford E-350. Attached is a clip from our linked wiring article so you can see how to gain access to the wiring for your brake controller and 12V power connections. If you aren't able to find the OEM wiring on your E-350, you will want to connect the blue wire from the Curt Adapter # C51322 to the Blue wire on the Hopkins Connector # 37185. The brown wire on that...
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    Image 1 for
  • Recommended 7 Way Trailer Connector and Brake Controller for my 2017 Ford Explorer
    The Curt T-Connector Vehicle Wiring Harness with 7-Way Trailer Connector part # C56306 is designed to give you a fully working 7-way connector including the 12 volt power. To add a brake controller like the Curt TriFlex Trailer Brake Controller part # C24VV you will use the Curt Custom Wiring Adapter for Trailer Brake Controllers part # C51322. Check out the linked videos for details on the installations.
    view full answer...

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