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  1. Accessories and Parts
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  4. Wiring Adapter
  5. Plugs into Brake Controller
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Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug

Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug

Item # HA81786-HBC
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HA81786-HBC - Vehicle Specific Hayes Trailer Brake Controller
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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 beneath your vehicle's dash. Call 800-298-1624 to order Hayes accessories and parts part number HA81786-HBC or order online at 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 (19)
  • Q & A (0)
  • Photos
  • Why etrailer?

Hayes Accessories and Parts - HA81786-HBC

  • Trailer Brake Controller
  • Wiring Adapter
  • Plugs into Brake Controller
  • Hayes
  • 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 beneath 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 beneath 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 6-pin connector on your vehicle's built-in brake control wiring harness. The harness is located underneath the dash, to the left of the steering column, 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.

81786HBC Hayes Dual-Mated Brake Control Wiring Harness - Nissan and Infiniti

Replaces 81786-HBC

This Product Fits The Following Vehicles

Customer Reviews

Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug - HA81786-HBC

Average Customer Rating:  4.9 out of 5 stars   (19 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 beneath your vehicle's dash.

- HA81786-HBC

Shipping was quick. The wiring harness made installation very easy. Overall very impressed with the controller. Everything from start to finish was perfect. Installation took about 15 min. Would highly recommend.

- HA81786-HBC

Associate was very helpful on the phone, the cable I needed came very quickly and was installed easily. thank you

- HA81786-HBC
Nissan Titan

Nissan Titan pulling a fully loaded 14x7 Cargo Mate Blazer enclosed trailer. The unit was pretty easy to install. etrailer included the proper wiring harness for my Titan. It is not difficult to find the proper brake setting for the load size and not hard to tweak on the fly. This unit worked like a charm while hauling this large load about 1000 miles. So far it has been worth every penny and I got it at a great price!

- HA81786-HBC
Nissan Frontier

I needed to tow with my Nissan NV2500 HD cargo van. I bought this with a brake controller and both work fantastic. I had also bought an adapter here for my Nissan Frontier and it is working great as well. I can’t say for other manufacturers, but if you plan to outfit your Nissan to tow, this is the place to get the harnesses, adapters or hardware you need.

- HA81786-HBC
2016 GMC Canyon

Customer service was friendly and knowledgeable in directing me towards this direct fit product. Price was very reasonable and shipping was fast. Product fits into existing connected under driverdashboard and literally snaps together in seconds. Used zip ties to make slight excess wire neat under dashboard and prevent any future snapping any excess.

- HA81786-HBC

Plugs together easy install 1 minute

works good for my 25 RV
Howard - 04/27/2021

- HA81786-HBC
2019 Nissan Frontier

Worked well with 1 connection at harness on 2019 Nissan frontier. I am a 25 year auto mechanic and this is one anyone can do.... good product and seems well made. Rev. Tucker

- HA81786-HBC
2006 Nissan Titan

First of all I'd like to say kudos to e-trailer for getting a brake controller and wiring to my house in Vermont from their place in Missouri overnight. I was shocked when It got here so fast, they saved my vacation. I really like the Hayes brake controller it works very well and is predictable. It's also very easy to set up once it's all connected. It was a breeze to install particularly on my 2006 Nissan Titan, it was two plugs, and stick it on the dash, and I was done. The only thing I need now is a bigger better truck to pull my 8000 pound trailer up to the speed limit, never did make it. The Nissan is a bit week for the job and it overheated a couple of times on hills and I had to turn on the heater to drain extra heat and bring the temperature back down, no AC allowed. But the trip went well nonetheless. My next truck will be diesel with dual wheels four-wheel-drive, no monkeying around next time. Thanks e-trailer! I'll be back to get my gear for my next truck from e-trailer for sure??

- HA81786-HBC
2012 Nissan Armada

Great product - The brake controller was ordered for my 2012 Nissan Armada, it plugged into the factory wiring harness and was installed in 30 minute. Service was excellent! This is the way all e-purchases should be handled. Confirmation e-mail, delivery tracking and delivery confirmation. - Thanks

- HA81786-HBC

Easy installation. No problems in the year I have had it. Works great. Trailer brakes activate smoothly even at low speed

- HA81786-HBC
2005 Nissan Titan

Connected with no problem to my 05 Nissan titan

- HA81786-HBC

Fit perfectly. Love the helpful installation videos for all the products.

- HA81786-HBC

Does the job it was made for.

- HA81786-HBC

Quick and easy! Quality construction

- HA81786-HBC

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video by:
Joshua S
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Cole B
Installed by:
Cole B
Employee Tammy D
Written by:
Tammy D
Employee Ryan G
Test Fit:
Ryan G

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