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  1. Trailer Brake Controller
  2. Hayes
  3. Electric
  4. Time Delayed Controller
  5. Under-Dash Box
  6. Up to 2 Axles
Hayes Syncronizer Trailer Brake Controller - 1 to 2 Axles - Time Delayed

Hayes Syncronizer Trailer Brake Controller - 1 to 2 Axles - Time Delayed

Item # HA81725
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Our Price: $67.57
Trailer Brake Controller
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Shipping Weight: 0.71 lbs
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Product Expert Kathleen M

Is this right For you? Product Expert Kathleen M says:

Yes, if you:

  • Are replacing an older brake controller and just want something simple
  • Are used to the old-school time-delay function
  • Prefer American-made products

No, if you:

  • Have a trailer with more than 2 axles
  • Worry about your brakes locking up and wearing out your tires prematurely
  • Like having detailed installation and troubleshooting instructions
Economically priced brake controller automatically engages your trailer's brakes with a preset intensity when you apply the brakes in your vehicle. Power output is easily adjustable. Includes LED indicator and manual override. Lowest Prices for the best trailer brake controller from Hayes. Hayes Syncronizer Trailer Brake Controller - 1 to 2 Axles - Time Delayed part number HA81725 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (36)
  • Q & A (0)
  • Photos
  • Why etrailer?

Hayes Trailer Brake Controller - HA81725

  • Electric
  • Time Delayed Controller
  • Hayes
  • Under-Dash Box
  • Up to 2 Axles
  • Automatic Leveling
  • Dash Mount
  • 360 Degrees
  • Indicator Lights

Economically priced brake controller automatically engages your trailer's brakes with a preset intensity when you apply the brakes in your vehicle. Power output is easily adjustable. Includes LED indicator and manual override.


Features:

  • Brake controller activates trailer brakes with preset intensity
    • Signal is sent to trailer brakes when tow vehicle's brakes are activated
  • Adjustable power output lets you determine the amount of power sent to the trailer's brakes
    • Set to higher output when towing in hilly terrain or with a fully loaded trailer
    • Back off power output when towing a lightweight or empty trailer
  • Red LED indicator on front of unit illuminates when trailer's brakes are applied
    • Light glows brighter as power output increases
  • Built-in safeguards protect your vehicle and your trailer
    • Manual override illuminates brake lights on tow vehicle and trailer
    • Current limiter protects vehicle from shorts in the trailer wiring
    • Hazard flasher immunity prevents pulsing of the brakes when flashers are activated
  • Slide-bar manual override
  • Dependable solid-state construction
  • Quick and easy installation
    • Can be mounted at any angle in any plane, and in any direction
    • Mounting bracket and hardware included
    • Plug-in, vehicle-specific brake control adapter (sold separately) can be used for certain applications to reduce installation time
  • Made in the USA


Specs:

  • Application: trailers with up to 2 axles (4 brake assemblies)
    • Designed for use with electric brakes only
  • Dimensions: 5-1/4" long x 3-1/8" wide x 1-1/4" tall
  • 3-Year limited warranty


Time-Delayed Braking

The Syncronizer applies your trailer's brakes when the brake pedal in your tow vehicle is engaged. Every time you apply the brakes in your vehicle, a signal is sent - via the brake switch - to the Syncronizer. The controller then sends power out to your trailer brakes to activate them with an intensity you have set. The amount of braking power can be adjusted to suit your preference. To determine the amount of power that is best for your application, you must test out your towing setup and choose what feels best.


A time-delay controller is so named because there is a delay between the time that you initially apply the brakes in your tow vehicle and the time that the controller reaches the set maximum power output. Unlike a proportional brake controller, which activates your trailer's brakes based on the deceleration of your tow vehicle, the Syncronizer sends power out in the same way, with the same user-set delay, no matter the braking situation. The controller will continue to send out power to the trailer brakes as long as your foot is on the brake pedal, even when your truck and trailer have come to a stop.


Built-In Controls on the Syncronizer

Syncronizer Controls

The diagram above shows the controls and components of the Hayes Syncronizer electric trailer brake controller.


Power Output Control

The power output control lets you set the maximum amount of power that will be applied to your trailer's brakes. Typically, the power output is only readjusted if you switch from a heavy, loaded trailer to a much lighter, empty trailer - or vice versa.


During the initial setup process, use the thumbwheel on the left front of the Syncronizer to adjust the output. To get more power to your brakes, rotate the dial upward. To decrease the power output, move it downward.


Red Indicator Light

The red LED indicator light illuminates when the trailer brakes are applied. This light glows brighter as the power output to the trailer brakes increases.


Slide-Bar Manual Override

The manual slide lever overrides the preset power output and allows the operator to engage the trailer brakes without using the vehicle's brakes. In addition to being a necessary safety feature, this option helps to control trailer sway by slowing the trailer to put it back solidly behind the tow vehicle.


You can also engage the manual override to help you move a sliding 5th-wheel hitch closer to your truck's tailgate for tight maneuvering during slow speed turns. Just apply the manual override to hold the trailer in place while slowly moving the tow vehicle forward.


Quick, Simple Installation

Because inertia plays no role in the functioning of this controller, you do not have to mount the unit at any particular angle or position it in any particular direction. As a result, mounting options are limitless, so long as you can still easily access the manual override.


Installation of the Syncronizer requires that you either purchase a custom wiring adapter designed to plug into the controller or that you hardwire the controller directly into your vehicle. To hardwire the unit, you must remove the plug at the end of the integrated wiring harness.


Installation Accessories

The Hayes vehicle-specific, dual-mated wiring adapter is available for most newer trucks and SUVs with tow packages. One end of the custom adapter plugs into your vehicle's brake controller port, and the other end plugs into the controller - no hardwiring required.


Hayes also offers a universal wiring harness (HA81789-HBC - sold separately) that plugs into any Hayes brake controller. The 4 leads on the universal harness can then be hardwired into your vehicle. By splicing the universal adapter into your wiring instead of directly connecting the brake controller to your wiring, you gain the ability to unplug and remove the controller from your vehicle should the need arise.


Notes:

  • If a custom brake-control wiring adapter is not available for your vehicle, one of the following will be required:
    • 20-Amp circuit breaker (9506P - sold separately) for 2-brake applications
    • 30-Amp circuit breaker (38630 - sold separately) for 4-brake applications
  • If you're hardwiring the controller, it is also suggested that you install an in-line fuse between the controller and the stop light switch (required on 1999 and newer Fords).

See also etrailer.com's exclusive 7- and 4-way brake control installation kit (ETBC7 - sold separately) if you don't already have a 7-way plug at the back of your vehicle.



81725 Hayes Synchronizer Electric Brake Controller - Time Based

Installation Details HA81725 Installation instructions




Customer Reviews

Hayes Syncronizer Trailer Brake Controller - 1 to 2 Axles - Time Delayed - HA81725

Average Customer Rating:  4.8 out of 5 stars   (36 Customer Reviews)

Economically priced brake controller automatically engages your trailer's brakes with a preset intensity when you apply the brakes in your vehicle. Power output is easily adjustable. Includes LED indicator and manual override.

by:

This is the 2nd one of these I’ve bought. I like the time delay application to the brakes. Always will try to buy products made in the USA. The price went up since I bought this same controller 1 1/2 years ago.



by:

Works well. I like the delayed brake activation, it seems to be a smoother transition. The custom harness makes installing this controller easy and FAST. Love buying Made in the USA products and etrailer.com has a lot of them.



by:

Was easy to install and adjust. Works great applying breaks to my single axle dump trailer.



by:

Original supplied item was defective, however Hayes customer service immediately sent another unit and it works great. With the addition of a small removable slip in bracket for the console of my 2012 GMC 1500 Crew Cab and the wiring adapter, I can simply plug and play when I need the controller as opposed to a permanent installation that I have in my other pickup.



by:

easy to install. Brakes tested good to trailer. I used self taping screws to mount brackets, rather than the bolts and nuts that it came with.It was to difficult to get my hands in position to use bolts and nuts (no big deal).



by:

First time user on eTrailer. Great website and easy to use. With my parts selected the site suggested the quick connect wire kit for my vehical. This made installation a breeze.



by:

Good controller at a good price. Works as expected. Fast shipping at standard rate. This controller was installed in an 08
Sprinter camper with the help of the on line video from etrailer.
Thanks,
Gary



by:

Installed in 10mins in 2018 ram 1500 ecodiesel, have not used with trailer yet. Seems good for price, mounting bracket could be made a little better. Good service from e trailer



by:

Worked fine, plug and play with adapter cord.



by:

Used from the day I got it almost everyday and works great



by:

My Hayes Brake controller was as described, Easily wired,mounted reasonably price,



by:

Installed in 10 minutes. Works excellent and combined with the wiring adapter was a simple plug and play.



by:

super fast delviery great product pluged right in


Comments
Best controller out there
Duncan - 06/10/2020

by:

Great product great company.


Comments
Sold that truck but the product was A+ easy install worked perfectly.
William - 03/07/2020


by:

Plug and play need I say more?



by:

The trailer seems to be holding up just fine. It was a good investment for my small business and I'm thinking about buying another from you.



by:

Ty for following up with your product that we purchased si far so good *



by:

Works as it should! No issues.



by:

They told me it would be a week for delivery since it was coming by mail, I got it in three days. Very fast and easy to order.



by:

very good.



by:

Works well. At an affordable price.



by:

Product and function is working fine.



by:

Ive used this controlrr a couple of tumes and really like it i got great service and fast delivery thank you so much



by:

Well pleased with the break box and wiring hook up,
Very simple to install.



by:

Fast delivery, excellent product at a fair price.

Thanks


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Sarah H
Expert Research:
Sarah H
Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video by:
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Employee Kathleen M
Updated by:
Kathleen M
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
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Employee Kristina F
Updated by:
Kristina F
Employee Matthew E
Updated by:
Matthew E
Employee Dustin K
Video Edited:
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Employee Cole B
Installed by:
Cole B
Employee Tammy D
Written by:
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Test Fit:
Ryan G

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