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  1. Trailer Brake Controller
  2. Hayes
  3. Air to Electric
  4. Electric over Hydraulic
  5. Proportional Controller
  6. Indicator Lights
Hayes Air Actuated Trailer Brake Controller - 1 to 4 Axles - Proportional

Hayes Air Actuated Trailer Brake Controller - 1 to 4 Axles - Proportional

Item # HA100400C
Our Price: $279.05
Trailer Brake Controller
This item qualifies for Free Shipping
Shipping Weight: 1.26 lbs
Quantity: 
In Stock
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Product Expert Kathleen M

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

Yes, if you:

  • Haul a fifth-wheel trailer with a semi or a similarly large truck equipped with air brakes
  • Would rather use your air brake system than run a ton of wiring in your truck
  • Often use hazard lights while towing

No, if you:

  • Don't want to mess with air fittings and needing extra parts to complete the install
Tow your fifth-wheel trailer with your air-brake-equipped semi or truck. This air-actuated trailer brake controller senses the amount of pressure you apply to your vehicle's air brakes and applies the trailer brakes proportionally. Great Prices for the best trailer brake controller from Hayes. Hayes Air Actuated Trailer Brake Controller - 1 to 4 Axles - Proportional part number HA100400C can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (73)
  • Q & A (0)
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Hayes Trailer Brake Controller - HA100400C

  • Air to Electric
  • Electric over Hydraulic
  • Proportional Controller
  • Indicator Lights
  • Hayes
  • Up to 4 Axles
  • Under-Dash Box
  • Dash Mount
  • Manual Leveling
  • Up to 360 Degrees

Tow your fifth-wheel trailer with your air-brake-equipped semi or truck. This air-actuated trailer brake controller senses the amount of pressure you apply to your vehicle's air brakes and applies the trailer brakes proportionally.


Features:

  • Brake controller activates trailer brakes in proportion to your vehicle's braking action
    • Senses the pressure applied to the tow vehicle's brakes and sends the same amount to the trailer brakes
  • Aggressiveness of braking can be easily adjusted with built-in knob
  • Knob slides for a manual override within easy reach for controlling trailer sway or stopping in emergencies
  • Red LED light on the top of the unit indicates when the trailer brakes are applied
    • Light glows brighter as power output increases
  • Hazard flasher immunity prevents brakes from pulsing when your hazard lights are on
  • Mounting bracket and hardware included
  • Made in the USA


Specs:

  • Application: tow vehicles with air brakes
    • Trailers with up to 4 axles (8 brake assemblies)
    • Compatible with electric or electric-over-hydraulic trailer brakes
  • Dimensions: 8-1/2" long x 3" wide x 1" tall
  • Air input port thread size: 1/8" NPT
  • 1-Year limited warranty


With a conventional electric brake controller, hauling a fifth-wheel trailer with a semi or truck that has exhaust brakes can be a challenge. Whenever you're going down a long downgrade and you engage your exhaust brakes, the brake controller could turn on too. If that happens, all the way down that long hill, the trailer brakes will stay engaged and potentially overheat. This will wear down your brakes a lot faster. You'll have the same problem if you put your hazard lights on, with the brakes pulsing with each blink. You could really dig into your wiring and do some splicing to fix this problem. Or you could get the Hayes air-actuated brake controller and have smooth, flawless braking with a controller made for air brakes.


Proportional Braking

What is proportional Braking

The Hayes air-actuated brake controller gives you proportional braking for the best towing experience. Proportional braking means that your trailer brakes mimic your tow vehicle's brakes. If you slam on the brakes in your vehicle, your trailer brakes will activate with the same intensity; if you brake lightly, your trailer brakes lightly too. The trailer's braking is in proportion to your vehicle's braking. This saves wear and tear on the tires and the brakes on both your vehicle and trailer.


This air-activated controller ties into your vehicle's air brakes to sense exactly how much pressure you are applying to the brakes. It then sends a signal to the trailer to apply the brakes with a matching amount of force. The result is uniform braking across your towing setup. No push-pull action just smooth, proportional braking every time.


For assistance in properly wiring the Hayes air-actuated brake controller, please refer to the diagram below:

Hayes air-actuated brake controller wiring diagram


100400C Hayes Air Activated Electric Brake Controller - Proportional

Replaces 100400B

Installation Details HA100400C Installation instructions



Customer Satisfaction Score:


Customer Reviews

Hayes Air Actuated Trailer Brake Controller - 1 to 4 Axles - Proportional - HA100400C

Average Customer Rating:  4.8 out of 5 stars   (73 Customer Reviews)

Tow your fifth-wheel trailer with your air-brake-equipped semi or truck. This air-actuated trailer brake controller senses the amount of pressure you apply to your vehicle's air brakes and applies the trailer brakes proportionally.

by:

INSTALL OF HAYS AIR ACTUATED TRAILER BRAKE CONTROLLER PART NUMBER 100400C
ON A 2018 FRIEGHTLINER CASCADIA WITH A 45 FOOT GOOSE NECK


Well, my first attempt to put an electric brake controller on my 2018 Frieghtliner cascadia was complete failur. I used an agility brake controller first when it was complete it kept flashing 10 when the brakes were applied, do your self a favor and waist of money don’t try to install one of the brake controller you get at advance or O’riellys they wont work on a 2018 but will work on 2006 Frieghtliner but here’s the thing i suggest going to extra mile and buying this hay’s air brake over electric and over electric over hydronic which’s is what im using with my 2018 Frieghtliner after dragging this trailer around for at 6 months not relaxing the brakes wasn’t working on the trailer.
Fast forward to Monday 10-10-22 i called and ordered this air brake over electric part number 100400c had the mechanic do install for me ooooooooooooh sweet sweet music to hear that break away brake system fire up and apply the brakes for the first time in a 6 months was bliss.
Ordered 10-10-22 received 10-14-22 package was damaged and wet BUT WAS NO FUALT OF ETRAILER’S damaged in transit by usps, all parts was still in box went to install it.

On my install we hooked all wires accordingly like the instructions says to son the air connection part we cut a corner, on the install the instruction says to use a dual check valve to install the air line we only counted to the mail supply air line tested for air when applying the brakes got the correct line put a t connecter inline connected the 1.4 inch air hose ran through body hole connected to the hays controller tested the brakes and then the music started playing.

BOTTOM LINE IS YOU CANT GO WRONG IF YOUR TOW UNIT IS AIR EQUIPPED AND YOUR TRAILER IS ELECTRIC OR ELECTRIC OVER HYDRAULIC




by:

This is an excellent way to provide proportional brake energy to trailers with electric brakes.
Well designed, reasonably priced.




by:

Fast delivery but would have been nice if it came with everything needed to install. But looking forward to installing and seeing how it works




by:

Good quality actuator.




by:

Definitely a great product! Easy installation and great instructions! I use my semi to pull my camper occasionally and this box works great for the electric brakes on the camper from the air brakes on my truck.




by:

etrailer is very reliable for getting the orders out in a timely manner. The website is very easy to navigate and there are always explanations about products so you can verify that you are getting the proper product for what you need.




by:

Very nice unit. Have not installed yet. I will say it would have been nice if the sight gave you options for those Cesery‘s you could use…. Check valve, colored wire ect. I will review after install.




by:

Needed a brake controller for my RV hauler conversion. Worked great and very easy to install. Received quickly and staff was very helpful!




by:

Installed and tested but not yet used. The controller is of very high design and build quality. For the air connection, all I had to do was tee into the air line that goes to the brake light switch which already has a double check valve in place.




by:

I have not hooked up the unit yet. I have an overland osprey diesel pusher(dp). The coach has an exhaust brake. When the exhaust brake engages the brake lights automatically come on. Using a conventional electric brake controller like the Prodigy
P2 would engage the trailer brakes when ever the exhaust brake engages, causing the trailer brakes to burn up on long down grades. I know this can be fixed by adding a diode in the wiring, but that involves tracing a lot of wires until I found the right one. this unit doesn't need to connect to the brake lights. it only needs the air pressure being applied to the brakes to engage the trailer brakes. It really is a sweet unit for a DP with air brakes.




by:

the information provided with the is stall is very veg they could have told you where
to get a check valve they could have showed you in detail how and where to hook
into the air valve , what lines to hook into , or offed a video on how to install
for what it cost it is a rip off, you need to let hays know this for future sales


Comments
This is a pretty specialized piece of equipment whose install procedure will vary according to the vehicle it is installed in. At this time, we have not had the opportunity to install one, which is why we do not have a video to provide.
-- Etrailer Expert Mike L - 04/09/2019


by:

Worked great




by:

Installed in 2002 Peterbilt 320 with air brake system, for use on electric over/hydraulic trailer brakes system. It works great!


Comments
Have found no issue, and recommend this product for air to electric or air to electric overhydraulic system. My power unit is heavy enough that I hardly need trailer brakes, I have them set to come on mildly on the trailer. This unit makes my tractortrailer unit legal for highway use.
Pate. - 02/18/2021
Have found no issue, and recommend this product for air to electric or air to electric overhydraulic system. My power unit is heavy enough that I hardly need trailer brakes, I have them set to come on mildly on the trailer. This unit makes my tractortrailer unit legal for highway use.
Pate. - 02/18/2021


by:

The controller worked ok for the three axle trailer but it would not lock the brakes even when the trailer was empty




by:

Good product, works great.


Comments
Works great
Kevin - 03/06/2022


by:

Works great. Customer service was above and boyond helpful. 100% excellent. Thanks for a great product!!!!




by:

Works great on my Peterbuilt 330 set up with a 12' flatbed with gooseneck and 2" receiver hitches. The electric trailer brakes actually work when you expect them to.




by:

Purchased this for a Class 8 truck with air brakes. It was easy to mount and to install. Wiring it up was a snap, but I was surprised that I ordered 2 and did not receive instructions with either. Had to go online to get a schematic and operating/mounting instructions. Wasn't a big deal as etrailer had it on the product description, but if you're old school like me you expect to receive instructions with the product.




by:

I have been very please with the Hayes Air Actuated Brake Controller, then one morning it wouldn't work. Tommie at etrailer was great helping me diagnose the problem and replaced the unit asap. Great service!




by:

Hard to adjust and you can't test the trailer brakes with it. Never fells like the trailer is getting power to activate the trailer brakes even though there's 12 volts going to the brake wire




by:

Would buy from this vendor again




by:

Works as expected
Gives excellent braking
proportion from air to electric.


Comments
Works great ,, meets all expectations
Glen - 04/29/2021


by:

Received controller in record time yesterday. It is going to be installed in my Peterbilt 379 soon. I can't atttest to it's quality as it hasn't been installed but overall it looks great!




by:

This is the best brake controller I have found. I purchased this to use with my International 4700 and disk brake set up. Smooth and reliable. Would most deifinitely purchase this again.




by:

Totally bulletproof compared to wimpy electronic controller. Breeze to install. Easy to control.

Fast order fulfilment. Good staff



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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 Kathleen M
Updated by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Manda E
Updated by:
Manda E
Employee Amanda K
Updated by:
Amanda K
Employee Laura H
Written by:
Laura H
Employee Cole B
Installed by:
Cole B

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