Product Experts Available Now!
Call 800-298-8924
Brake Controller
/
Hayes
/
Time Delayed Controller
/
Electric
/
Up to 2 Axles
/
Under Dash Mount
Hayes Syncronizer Trailer Brake Controller - 1 to 2 Axles - Time Delayed
(22 reviews)
Price: $41.95
In Stock
Hayes Syncronizer Trailer Brake Controller - 1 to 2 Axles - Time Delayed
Item # HA81725
Retail:$54.99
Our Price: $41.95
You Save: 24%Orders above $99 qualify for Free Shipping
- Hayes
- Time Delayed Controller
- Electric
- Up to 2 Axles
- Under Dash Mount
- Automatic Leveling
- 360 Degrees
- Indicator Light
- All Info
- Reviews (22)
- Q & A (26)
- Videos (2)
- Photos
- Why etrailer?
Hayes Brake Controller - HA81725
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
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 
Video of Hayes Syncronizer Trailer Brake Controller - 1 to 2 Axles - Time Delayed
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hayes Brake Controller - Time Delayed Controller - HA81725 Review
Hayes Syncronizer Trailer Brake Controller Installation - 2014 Jeep Grand Cherokee
Video Transcript for Hayes Brake Controller - Time Delayed Controller - HA81725 Review
Today we'll be reviewing part number HA81725. This is the Hayes Syncronizer Trailer Brake Controller for one to two Axles. It is a timed delayed break controller. This brake controller is going to activate your trailer brakes with preset intensity. Then a signal is sent to the trailer brakes when the tow vehicle's brakes are activated. It does have adjustable power output that lets you determine the amount of power sent to the trailer's brakes.
That way you can set it to a higher output when towing in hilly terrain or with a fully loaded trailer or you can back off the power output when you tow a lightweight or empty trailer. Here on the front, it does feature a red LED indicator that will illuminate when the trailer's brakes are applied. The light glows brighter as power output increases. The Hayes brake controller features a built-in safeguards that are going to protect your vehicle and your trailer. It has a manual override that illuminates the brake lights on tow vehicle and trailer. It also has a current illuminator that's going to protect the vehicle from shorts in the trailer wiring and it has the hazard flasher immunity to prevent the pulsing of your brakes when your flashers on your vehicle are activated. Here on the front, it features the easy to access slide-bar manual override.
It's made from a dependable solid-state construction. We also have a little wheel knob here, that way we can increase the gain. This is a quick and easy installation. This can be mounted at any angle, in any plane, and in any direction. Mounting bracket and the hardware are included.
You can see here on this side that we have numerous smaller holes, that way we can totally choose the mounting location that's going to best suit our application. Hayes also offers plug-in, vehicle-specific brake control adapters that are sold separately, those can be used for certain applications to help reduce the installation time. This is designed to be use trailers with up to two axles or four brake assemblies. This is designed to be used with the electric brakes only. The overall length is going to measure 5-1/4 of an inch. The width is going to measure 3-1/8 of an inch and the system is going to measure an 1-1/4 in height. That's going to do it for today's review of part number HA81725.
This is the Hayes Syncronizer Trailer Brake Controller. .
Customer Reviews
Hayes Syncronizer Trailer Brake Controller - 1 to 2 Axles - Time Delayed - HA81725
Average Customer Rating: 4.9 out of 5 stars (22 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.
- HA81725
by: Cindy B03/12/2017
Ty for following up with your product that we purchased si far so good * 351738
- HA81725
by: Bob P.04/10/2016
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. 243611
- HA81725
by: Wally08/19/2019
very good. 691467
- HA81725
by: George08/11/2019
Worked fine, plug and play with adapter cord. 683496
- HA81725
by: Kevin06/18/2019
The web site was easy to use. the parts arrived quickly and was a great experience. 659586
- HA81725
by: Duncan06/10/2019
super fast delviery great product pluged right in 655869
- HA81725
by: Dave 2018 ram 1500 eco04/07/2019
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 619266
- HA81725
by: William03/06/2019
Great product great company. 610534
- HA81725
by: Charles07/13/2018
Fast delivery, excellent product at a fair price. Thanks 541402
- HA81725
by: Lydia12/12/2017
This worked well, thanks. 459539
- HA81725
by: Jesus12/12/2017
Very good 459450
- HA81725
by: Jay04/14/2017
Works as it should! No issues. 367432
- HA81725
by: Andrew Ammerman04/11/2017
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. 367445
- HA81725
by: Jamie r03/27/2017
Ive used this controlrr a couple of tumes and really like it i got great service and fast delivery thank you so much 359239
- HA81725
by: darryl01/13/2017
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. 335002
- HA81725
by: Greg12/05/2016
Good product works great. 322355
- HA81725
by: Wayne11/18/2016
My Hayes Brake controller was as described, Easily wired,mounted reasonably price, 317660
- HA81725
by: Rob08/27/2016
Installed in 10 minutes. Works excellent and combined with the wiring adapter was a simple plug and play. 288285
- HA81725
by: Brad03/03/2016
Product and function is working fine. 239354
- HA81725
by: Charles H05/30/2015
Well pleased with the break box and wiring hook up, Very simple to install. 198756
- HA81725
by: Gary03/19/2015
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 179652
- HA81725
by: Dustin Hiett02/08/2015
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. 172891
22
22
Ask the Experts about this Hayes Brake Controller
Do you have a question about this Brake Controller?
- What Does a CL or cl Code Mean on a Brake Controller
- I did some research and found that on some brake controllers, the "cl" code stands for Current Limit. This indicates that the brake controller has sensed a power requirement greater than its recommended output. This could result from an intermittent short to ground, a faulty brake magnet, or too many brakes connected to the controller.
Some brake controllers like the Hayes Engage, # HA81760, are designed for 2 - 6 brakes (up to 3 axles). But others like the Hayes Synchronizer, # HA81725...
view full answer... - Custom Wiring Harness for Hayes Brake Controller in 2017 GMC Sierra 1500
- Your Hayes Syncronizer Trailer Brake Controller - 1 to 2 Axles - Time Delayed # HA81725 is confirmed to fit your 2017 GMC Sierra 1500 using the custom wiring harness # HA81798-HBC. This adapter plugs into the port that is built into the electric junction box underneath your vehicle's dash. The black box is located to the left of the steering column, just above the carpet. To plug in the adapter, first remove the cover on the box. The adapter plugs into the first slot on the left, in the...
view full answer... - Brake Controller Install Harness for Hayes Synchronizer in a 2014 Chevy Silverado 1500
- To install the Hayes Brake controller part # HA81725 in your 2014 Chevy Silverado 1500 only requires you to use the install harness part # HA81798-HBC which is a confirmed fit.
view full answer... - Parts Needed to Install Brake Controller in a 2016 Ford Transit
- To install a brake controller in your 2016 Ford Transit Connect tou will need to start with a 4-way (if you do not have one). For that you would want the # C56218.
From there you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter part # ETBC7. I attached installation instructions and an install video for this product as well.
For a brake controller I would recommend the...
view full answer... - Brake Controller Compatibility with 2015 Audi Q7 TDI Prestige
- The Hayes Syncronizer Trailer Brake Controller -Time Delayed # HA81725 can be used on your 2015 Audi Q7. You will need to hardwire your controller, but I recommend using the wiring adapter # HA81789-HBC to allow you the quick connection so you can use this controller on other vehicles if desired. You will also need to use additional wiring as you pointed out. You will need to ask your authorized dealer for #1J0-972-782 housing (qty. 1) and #000-979-228 wire/terminal assemblies (qty....
view full answer... - How to Find the Brake Wire on a 2000 Chevrolet Express Van
- In order to find the brake wire under your dash, you are going to need a circuit tester like part # 40376. Then you are going to need someone to engage the brake on your 2000 Chevrolet Express Van as you use your circuit tester to see which is the brake wire. When you find the right wire, a light will glow on the circuit tester.
The wires you need to test are the bundle of wires coming out of the back of the brake pedal stop light switch. Use the circuit tester to find the hot wire only...
view full answer... - How to Complete Hardwire Installation of Hayes Synchronizer Brake Controller
- I'd be happy to assist with that.
In addition to the # HA81725 Hayes Synchroinizer brake controller, you'll need a universal wiring harness, part # HA81789-HBC and our Brake Controller Installation Kit, part # ETBC7. The kit includes everything necessary to install a brake controller in your vehicle, with the exception of the controller itself and a 4-pole trailer wiring harness for the vehicle.
If you click the provided link, you can see some FAQ articles about installing a brake...
view full answer... - Wiring Harness Recommendation for Installing Hayes Brake Controller in 2014 GMC Sierra 1500
- Easiest solution would be the brake controller install harness part # HA81798-HBC which is a confirmed fit for your 2014 GMC Sierra 1500 and is designed for use with the Hayes Syncronizer # HA81725. This would plug in on your truck in place of the wiring harness you have found.
Aside from that we don't know the wire color functions of your truck so you'd have to test them individually with a tester like part # PTW2993.
view full answer... - Will Hayes Sincronizer Trailer Brake Controller Fit on a Honda Goldwing Motorcycle
- Yes, the Hayes Syncronizer Trailer Brake Controller # HA81725 is a good choice with your Honda Goldwing.
A time delayed controller is a better choice on a motorcycle because of the limited space for installation. A proportional controller has more limitations as to how they can be mounted which will be an issue on a bike. Also, the leaning of a motorcycle while turning will tilt the controller and a proportional controller cannot function this way.
To connect the controller to the...
view full answer... - Recommended Hayes Trailer Brake Controller Wiring Harness for 2003 GMC Sierra SLT with Tow Package
- For your Hayes Syncronizer Trailer Brake Controller # HA81725 on your 2003 GMC pickup with tow package, you will want wiring adapter # HA81780-HBC. This will plug into your junction box beneath your vehicle's dash. That is all you will need as you stated.
view full answer... - How to Install Brake Controller in a 2004 Dodge Ram with 7-Way
- If the 7-way is factory on your 2004 Dodge Ram the install harness part # HA81782-HBC that you referenced would be the correct product to use to install the # HA81760.
To see where the harness should be on your vehicle check out the video I attached that shows a similar brake controller and harness being installed in a vehicle like yours. The harness should be under the dash near the emergency pedal.
If not, then you will have to hardwire the controller to your vehicle/7-way.
For...
view full answer... - Troubleshooting Hayes Syncronizer Trailer Brake Controller
- That is not normal. The Hayes Syncronizer Trailer Brake Controller - 1 to 2 Axles - Time Delayed # HA81725 should not give off any smell and should not be activating the brakes enough to cause smell if installed and adjusted properly. I've attached a video of this installation for you to reference.
When installed correctly, this unit should be adjusted for sensivity. This conroller has a red LED indicator on front of unit that illuminates when trailer's brakes are applied. This...
view full answer... - What Functions do the Wires on the Hayes Syncronizer Trailer Brake Controller # HA81725 Connect to
- Of course!
The Hayes Syncronizer Trailer Brake Controller # HA81725 has 4 wires on it that connect to the following functions:
Blue - Brake Signal Output
Black - 12V Power from Battery
White - Ground
Red - COLD Side of Stop Light Switch (only gets hot when brake pedal is pressed)
If you let me know what vehicle that you are installing it on I can check to see if there is a plug-in adapter so that you don't have to cut the connector off of your tow vehicle shuld one exist.
view full answer... - Wiring Adapter to Install Hayes Synchronizer # HA81725 Brake Controller in 2008 Toyota Tacoma
- Hayes does indeed offer a brake controller wiring adapter that's compatible with the 2008 Toyota Tacoma that's equipped with the factory 7-way trailer connector, part # HA81785-HBC.
I've provided you a photo of what the connector that will plug in under the dash looks like. It's a four pin connector, and you can clearly see the pin-out in the photo I've edited for you.
Your factory connector under the dash will have 5 pins, but the aftermarket wiring adapters and brake controllers...
view full answer... - Why Does Hayes Syncronizer Brake Controller HA81725 Not Light Up When Pedal is Pressed
- The display on the Hayes Syncronizer Trailer Brake Controller # HA81725 should illuminate both when you press the brake pedal and when you use the manual override lever. If it does not light up when you press the brake pedal then either there is a problem wit the red wire's connection to the brake light circuit or you have the power set so low that the display does not light up.
The controller will apply full power with the manual lever but with the brake pedal it will illuminate only...
view full answer... - Hayes Brake Controller Install Harness Recommendation for 2014 Dodge Ram
- To install a Hayes Syncronizer Brake Controller part # HA81725 in your 2014 Dodge Ram you would need the install harness part # HA81797-HBC which is a confirmed fit for your truck.
view full answer... - Brake Controller Install Harness Recommendation for Hayes Synchronizer in 2014 Ram 1500
- The harness you need is the part # HA81797-HBC for installing your Hayes Synchronizer part # HA81725 in your 2014 Ram 1500.
view full answer... - Correct Adapter for Hayes Brake Controller on 2018 Ram 1500
- The correct wiring adapter for a 2018 Ram 1500 using a Hayes brake controller such as the Syncronizer # HA81725 is the Custom Wiring Adapter # HA81795-HBC.
view full answer... - Troubleshooting Cruise Control Not Working After Brake Controller Install
- Sounds like you connected the red (stoplight switch circuit) wire to the wrong circuit on your truck. When the cruise control on a vehicle starts acting up that is a tell-tale sign that the wrong circuit is being used for the red wire.
What you want to do is use a circuit tester like part # PTW2993 to test the wires near the brake pedal to find the circuit that only sees 12 volts when the brakes are applied and none when the brakes are released. Correcting this should take care of both...
view full answer... - Red Light of Hayes Syncronizer Comes on When Applying Brakes with No Trailer Connected
- Yes, the red light on the Hayes Syncronizer Trailer Brake Controller # HA81725 will come on whenever you apply your tow vehicle's brakes, even when no trailer is connected. However, no power is used when there isn't a trailer detected.
view full answer... - Uninstalling Hayes Syncronizer Brake Controller From 2014 Ford Explorer
- To disconnect the Hayes brake controller you can simply unclip the wiring connection behind your trailer brake controller and tuck it out of the way. Then you can remove the brake controller from it's mount and either discard it or sell it. It will not in any way effect the braking on your vehicle. It only captures the brake light signal and then sends power to a trailer with brakes. Removing it will have no impact on your vehicle but only on your trailer towing ability.
view full answer... - Is it Normal for Brake Controller Light to Stay On When Not in Use
- Brake controllers don't have an off switch and are designed to go into a sleep mode after 15 minutes or so of inactivity. It sounds like your controller is wired up correctly in your 2009 Chevy Silverado and the controller just hasn't gone to sleep yet. You wouldn't want to just unplug it as that will cause it to lose it's user settings.
view full answer... - Will Hayes Syncronizer Brake Controller Work on a 2016 Ram 1500
- In the newer Rams the stoplight switch of yhe truck uses a lower voltage signal than most vehicles so only some controllers can be used. The confusion you have experienced with your local dealer and trailer shop is most likely stemming from that.
We have confirmation from Hayes that their Syncronizer part # HA81725 will work on your 2016 Ram 1500 and all you would need to install it is the harness part # HA81795-HBC.
view full answer... - Brake Controller Wiring Harness For A 2009 Dodge Ram 2500
- The correct wiring harness that will connect the Hayes Syncronizer Trailer Brake Controller part # HA81725 to factory wiring harness on your 2009 Dodge Ram 2500 is the Custom Wiring Adapter for Hayes Brake Controllers part # HA81782-HBC. This a complete plug and play option that will not require hardwiring unless you do not already have a factory trailer connector installed, in that case you will need to use the hardwire wiring harness that comes with the Hayes Syncronizer Trailer Brake...
view full answer... - Wiring Harness to Connect Hayes Syncronizer Brake Controller # HA81725 to 2005 Dodge Ram 1500
- The existing wiring harness you have used to connect your Hayes Syncronizer Trailer Brake Controller # HA81725 to your 2007 Dodge Dakota will also work to install this unit in your 2005 Dodge Ram 1500. The harness is part # HA81782-HBC and it plugs in between the hardwired connector at the back of the controller and the connection port under the dash on your Ram 1500.
The Hayes Syncronizer brake controller # HA81725 is a time-delayed type as opposed to a proportional type brake controller....
view full answer... - Red Light Not Illuminating On Hayes Syncronizer Trailer Brake Controller in 2002 Chevy Silverado
- The red light of the Hayes Syncronizer Trailer Brake Controller part # HA81725 should only illuminate when the vehicle's brakes are depressed which activates the trailer brakes. If your not getting the red light when you depress the brake pedal it doesn't sound like the brake controller has power.
It sounds like you are using the hayes brake controller adapter wire part # HA81781-HBC, you may want to check the fuses in the Chevy to make sure all of the factory tow package fuses are...
view full answer...
Do you have a question about this Brake Controller?
Why etrailer.com?
At etrailer.com we guarantee:
Highest quality brake controller 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 brake controller 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
Satisfaction Guarantee
Need to return an item? No problem. Please read our Returns Policy for more information.
Info for this part was:
Expert Research:
Michael L
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Sarah H
Edited by:
Lindsey S
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Kristina F
Updated by:
Matthew E
Installed by:
Cole B
Written by:
Tammy D
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. Let us know if anything is missing or if you have any questions.
Product Experts Available Now!
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.