1. Accessories and Parts
  2. Hayes
  3. Trailer Brake Controller
  4. Wiring Adapter
  5. Plugs into Brake Controller
  6. Vehicle Specific
Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug

Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug

Item # HA81794-HBC
lowest price pledge
Our Price: $19.41
You Save: 38%
Accessories and Parts

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Orders above $99 qualify for Free Shipping
Shipping Weight: 0.37 lbs
In Stock
Accessories and Parts HA81794-HBC - Wiring Adapter - Hayes
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images


Install your Hayes electric trailer brake controller quickly and easily with this custom wiring adapter. One end plugs into the controller, and the other plugs into the built-in port behind your 's dash. Call 800-298-8924 to order Hayes accessories and parts part number HA81794-HBC or order online at etrailer.com. Free expert support on all Hayes products. Guaranteed Lowest Price and Fastest Shipping for Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (3)
  • Q & A (8)
  • Photos
  • Why etrailer?

2011 Ford F-150 - Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug

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

Install your Hayes electric trailer brake controller quickly and easily with this custom wiring adapter. One end plugs into the controller, and the other plugs 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 connector end plugs into the built-in port behind the dash of your vehicle
    • Opposite end plugs into the back of your electric brake controller
  • Compatible with time-delayed and proportional brake controllers from Hayes
  • Made in the USA

Installation of Hayes Brake Controller Adapter

To install your Hayes 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, in which the wiring is run for you from the dash to the trailer connector on the back of your vehicle. Usually 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 built-in connector behind your vehicle's dashboard. To access this connector, first locate the instrument cluster finish panel in the center of the dash, near the driver's side. Carefully pry the panel out and undo the locking tabs to remove the panel. Plug the adapter into the mating connector in the large gray housing behind the panel.

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.

81794HBC Hayes Dual-Mated Brake Control Wiring Harness - Ford

Replaces 81794-HBC

Customer Reviews

Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug - HA81794-HBC

Average Customer Rating:  5.0 out of 5 stars   (3 Customer Reviews)

Install your Hayes electric trailer brake controller quickly and easily with this custom wiring adapter. One end plugs into the controller, and the other plugs into the built-in port behind your vehicle's dash.

- HA81794-HBC
2019 Ford F-150

Etrailer was very helpful with all the info needed to buy the correct connecting cable for my Hayes brake control. Delivery was quicker than expected & of course the cable works as stated. Great job again! Thanks Etrailer! 734677

- HA81794-HBC

This harnress was exactly what I ordered. Very pleased as usual. I have to add that for a while I was sure that I had received the wrong product. Then I watched an Etrailer install video and realized that the plug in my truck had an adapter attached that had to be removed before the harness could be plugged in. 5 minutes later I was done and ready to tow. 528384

- HA81794-HBC

I, order wrong wire adapter by mistake, I called etrailer, and spoke to nice lady there and gave the number of the one I had ordered, she looked up what I needed and placed order while I was on the phone with her. Got the adapter and it was the correct one and works perfect. To help others Ford puts a hard shell in there wire to protect against short circuit, it has to be removed before you can plug any adapters into it. 420629


Ask the Experts about this Hayes Accessories and Parts

  • Does Hayes Brake Controller Install Harness # HA81794-HBC Fit 2016 Ford F-150
    Yes, the Hayes brake controller install harness part # HA81794-HBC that you referenced is a confirmed fit for your son's 2016 Ford F-150. The most popular brake controller used with this harness is the Hayes Genesis part # HA81790.
    view full answer...
  • Which Hayes Brake Controller Install Harness Fits 2015 Ford E-450 Cutaway Chassis
    The correct Hayes brake controller install harness that fits your 2015 Ford E-450 cutaway chassis is the part # HA81788-HBC and not the one you referenced as that fits newer models.
    view full answer...
  • Recommended Custom Wiring Adapter for Hayes Electric Trailer Brake Controller on 2011 Ford F-150
    To install the Hayes Genesis Trailer Brake Controller # HA81790 on your 2011 Ford F-150 with tow package, you will use the Custom Wiring Adapter for Hayes Brake Controllers # HA81794-HBC. This harness will install to the factory wiring harness located behind the dash to the right of the steering wheel. I've attached a photo to assist.
    view full answer...
  • Brake Controller Wiring Harness for 2017 Ford Expedition
    Not all manufacturers will utilize the same brake controller wiring harness. Hopkins, Tekonsha, Curt, etc, all have their own connections on the brake controller side and the vehicle manufacturers will have a specific connector if they are prewired for a controller as well. For instance the Hayes-Lemmerz Energize III+ Electric Trailer Brake Controller - Proportional # HA81742B will use the Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug # HA81794-HBC for a 2017 Ford...
    view full answer...
  • 2019 F150 Trailer Brake Controller Wire Size
    I'm not entirely sure a relay is used on that circuit, but it would provide a good explanation for the smaller wire gauge used on the factory pigtail. There's really no need to hardwire the controller. If the small wire gauge concerns you, there's an aftermarket one available, part # 22292. The black power wire and the blue brake output wire are both 12 gauge and the red stop lamp switch wire and the ground wire are both 16 gauge. This harness is designed for use with Tekonsha brake...
    view full answer...
  • Does Computer have to be Flashed to Install a Brake Controller in a 2016 Ford F-150
    You will not have to flash the computer on your 2016 Ford F-150 to install the Hayes Genesis brake controller # HA81790. I do recommend using the vehicle specific wiring harness # HA81794-HBC instead of a universal one that you would have to splice into the Ford harness. If you use the vehicle specific harness you can just plug the controller straight into the truck without having an intermediate harness between the 2.
    view full answer...
  • Brake Controller Wiring Adapter for 2014 Ford F-150
    The adapter you need to install an electric brake controller in your 2014 Ford F-150 depend on which controller you have. If you don't already have a controller I recommend the Prodigy P3, part # 90195, because it's the easiest to use and install. For the P3, or any other Tekonsha controller use part # 22292 for the adapter. A few other popular brands: For Hayes controllers use part # HA81794-HBC For Hopkins controllers use part # HM47845 For Curt controllers use part # C51436 If...
    view full answer...
  • Installing A Hayes Proportional Brake Controller In A 2017 FORD F350
    When installing a brake controller like the Hayes Genesis- Proportional # HA81790, your 2017 Ford F350 will not need to be re-programmed. You will be able to simply begin using the controller when you use the custom wiring harness # HA81794-HBC to connect to your dash. If you have a factory integrated brake controller, there may be a fault code that would need to be removed by the dealer by them turning off the TBC. That TBC can be turned back on at a later date as desired.. I've...
    view full answer...

  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality accessories and parts for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate accessories and part information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Edited by:
Lindsey S
Expert Research:
Jameson C
Installed by:
Cole B
Written by:
Tammy D
Updated by:
Sarah W

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.