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

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

Item # HA100400C
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Trailer Brake Controller
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HA100400C - Dash Mount Hayes Trailer Brake Controller
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This air-actuated brake controller senses the amount of pressure that you apply to your vehicle's air brakes and then smoothly applies your trailer brakes proportionately. Lowest 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 800-298-8924 for expert service.
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  • Reviews (23)
  • Q & A (85)
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  • Why etrailer?

Hayes Trailer Brake Controller - HA100400C

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

This air-actuated brake controller senses the amount of pressure that you apply to your vehicle's air brakes and then smoothly applies your trailer brakes proportionately.


Features:

  • Brake controller activates trailer brakes in proportion to your vehicle's braking action
    • Activates immediately - no pausing like with time-delayed brake controllers
  • Air-activated controller ties into your vehicle's air brakes to sense the amount of pressure that you apply to the brakes
    • Automatically adjusts trailer's braking based on how you depress the brake pedal in your tow vehicle
  • Rate of brake application can be increased or decreased by turning the controller handle
  • Red LED indicator on front of unit shows when trailer's brakes are applied
    • Light glows brighter as power output increases
  • Hazard flasher immunity prevents pulsing of the brakes when flashers are activated
  • Slide-bar manual override
  • Compact controller has black textured finish
  • 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)
      • Designed for use with electric brakes 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




100400C Hayes Air Activated Electric Brake Controller - Proportional

Replaces 100400B

Installation Details HA100400C Installation instructions




Customer Reviews

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

Average Customer Rating:  4.8 out of 5 stars   (23 Customer Reviews)

This air-actuated brake controller senses the amount of pressure that you apply to your vehicle's air brakes and then smoothly applies your trailer brakes proportionately.

- HA100400C
by:

Totally bulletproof compared to wimpy electronic controller. Breeze to install. Easy to control. Fast order fulfilment. Good staff 186049



- HA100400C
by:

The support from etrailer has been great. Following up on their products along with the resources they offer online has been excellent. 494204



- HA100400C
by:

Works great. Customer service was above and boyond helpful. 100% excellent. Thanks for a great product!!!! 610937



- HA100400C
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. 682528



- HA100400C
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 619342


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.
-- Mike L - 04/09/2019

52710

- HA100400C
by:

Works great, shopping and customer service top notch 816865



- HA100400C
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. 796657



- HA100400C
by:

Works as expected Gives excellent braking proportion from air to electric. 787264



- HA100400C
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. 776990



- HA100400C
by:

Installed in 2002 Peterbilt 320 with air brake system, for use on electric over/hydraulic trailer brakes system. It works great! 754915



- HA100400C
by:

Works great 728214



- HA100400C
by:

excellent service and time delivery 670587



- HA100400C
by:

Great product great shipping 646829



- HA100400C
by:

Great service, product was as advertised. Packaged well and arrived on time. Thank you 646634



- HA100400C
by:

Nice unit easy to install 643863



- HA100400C
by:

Very happy with this brake controller. 559262



- HA100400C
by:

E TRAILER WAS ON TOP OF MY ORDER FROM START TO FINISH WILL BE DOING BUSSINESS WITH THEM AGAIN 518324



- HA100400C
by:

So far so good. Thank you Darrell 461803



- HA100400C
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! 383996



- HA100400C
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! 368079



- HA100400C
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. 340715



- HA100400C
by:

Needed a brake controller for my RV hauler conversion. Worked great and very easy to install. Received quickly and staff was very helpful! 239684



- HA100400C
by:

Good product, good price, fast shipping. 220447


23
23

Ask the Experts about this Hayes Trailer Brake Controller

  • Recommended Brake Controller and Wiring for a Semi Trailer
    The Hayes Air Actuated Trailer Brake Controller part # HA100400C and the Tekonsha Prodigy P2 Trailer Brake Controller part # 90885 will both work on your semi, they just operate in different ways. The Hayes controller will apply force to the trailer brakes relative to the how hard the brakes in the tow vehicle are depressed whereas the Prodigy P2 will apply force to the trailer brakes relative to the deceleration of the tow vehicle. I recommend using the Tekonsha Prodigy P2 because it is...
    view full answer...
  • Recommended Air Brake Controller Compatible With Electric Over Hydraulic Brake Actuator
    We have exactly what you need. You will want the Hayes Air Actuated Trailer Brake Controller - 1 to 4 Axles - Proportional # HA100400C which is the only Air to Electric brake controller we carry that is compatible with electric over hydraulic brake actuators. For this installation I also recommend the Power Wire Kit for Electric Trailer Brake Controllers - 12 Gauge # BRK-ELECKIT and the Air Line Hose 1/4" # RM450700 sold by the foot. The similar Warner Air Utility Brake Control # 1300-80...
    view full answer...
  • Air Line Connection for Hayes Air Actuated Trailer Brake Controller HA100400C
    The Hayes Air Actuated Trailer Brake Controller # HA100400C will connect to your RV's air brakes by installing 3/16 or 1/4-inch diameter S.A.E. approved tubing like # RM450700 between the brake controller and the vehicle service line. For brake systems with primary and secondary service lines you'll connect to the existing two-way check valve between the two service lines and install the tubing from the output side of the check valve to the brake controller. The two-way check valve...
    view full answer...
  • Trailer Brake Controller for Diesel Coach with Air Brakes Pulling Trailer with Electric Brakes
    For your electric brake trailer behind an air brake coach, you simply need the correct trailer brake controller. I recommend using the Hayes Air Actuated Trailer Brake Controller - 1 to 4 Axles - Proportional # HA100400C which will adapt your air system to electric trailer brakes. If you already have a 7-way with 12v power in it, you can alternatively use the Curt Echo Wireless Trailer Brake Controller - 1 to 2 Axles - Proportional # C51180 which utilizes a Bluetooth compatible device...
    view full answer...
  • Is Check Valve Needed When Installing Hayes Air Actuated Trailer Brake Controller
    Actually the Hayes brake controller part # HA100400C requires a 2 way check valve only if the vehicle has primary and secondary service lines. I attached a diagram that shows how the controller wires in as well as how a check valve would get used if needed.
    view full answer...
  • Where Can Two-Way Check Valve be Found for Installing Hayes Air Actuated Trailer Brake Controller
    While we don't carry any two-way check valves for an air brake system that the Hayes Air Actuated Trailer Brake Controller # HA100400C would install on, I can say that two-way check valves are also known as double check valves and a quick browser search found that these are fairly easy to come by. I'm sure if you have a truck shop nearby that they would have just what you need as well. Just make sure that the check valve fits with your current air lines and that the tubing from the check...
    view full answer...
  • 2001 International 9400 Electric Brake Controller Recommendation
    Best option would be a brake controller that is designed to for vehicles with air brakes to tow trailer with electric brakes like the Hayes Air Actuated Trailer Brake Controller # HA100400C. This ties into the air brake system of your International 9400 and interprets the air pressure into applying a proportional amount of trailer brakes.
    view full answer...
  • Where Does Hayes Air Actuated Trailer Brake Controller # HA100400C Need to Mount
    You really need to have the Hayes Air Actuated Trailer Brake Controller # HA100400C mounted in a location that is close enough for the driver to reach out and grab the manual override lever if needed. I know it's tempting to mount it near where there's an air line but if that's at the back of the vehicle we can't recommend that. If your trailer ever starts swaying you can easily kill the sway by applying the manual override as it will pull the trailer back from the tow vehicle and stop the sway.
    view full answer...
  • Recommended Trailer Brake Controller for Class 8 Tractor with Air Brakes
    To power the electric brakes on your trailer I highly recommend the Hayes Air Actuated Brake Controller # HA100400C. This particular controller is designed specifically for tow vehicles like yours that are equipped with air brakes. It just ties into the air brakes (see attached image) and senses the amount of pressure that is applied, automatically sending a proportional amount of power to the brakes on the trailer for smooth and accurate stopping. This can be used on trailers with...
    view full answer...
  • Installation Of Hayes Air Actuated Trailer Brake Controller
    The Hayes Air Actuated Trailer Brake Controller - 1 to 4 Axles - Proportional # HA100400C mounts to the inside of your 2007 Nemar Essex at the dash just like other electric brake controllers will. It needs to be installed on the inside of the vehicle for proper function. It has a slide bar override that needs to be within reach for emergency trailer braking. The wiring connects just the same as an electric brake controller. Blue is trailer brake output, red is stop light swith, white...
    view full answer...
  • Recommended Electric Over Hydraulic Trailer Brake Conversion for Dual 10K Axles
    The Disc Brake Kit # K2R1058D13 by Kodiak is the brake set that you will need to use for your 10,000 lb Dexter Torsion axles. When it comes to hardware, like the brake line, I recommend going with the Kodiak Hydraulic Brake Line Kit # 24TA-BLKIT which will wear better than other traditional brands. These lines are very flexible so the line is easy to maneuver under the trailer. The only downfall is that you cannot cut the line due to how hard and risky it is to do yourself. All you have...
    view full answer...
  • Brake Controller on Tow Vehicle with Air Brakes
    The Hayes Air Actuated Trailer Brake Controller # HA100400C is designed to be used with a tow vehicle that has air brakes. However, that doesn't make it your only option. Electric brake controllers tie into the stop light switch of the tow vehicle so it doesn't matter what type of brakes it has. For an electric brake controller I suggest the Prodigy P3 # 90195 because it's one of the most reliable and easy to use brake controllers on the market.
    view full answer...
  • Can a RV with Air Brakes Have an Electric Brake Controller Installed
    That's actually what we recommend the most for people towing trailers with electric brakes that have tow vehicles with air brakes. Installing a P2 part # 90885 will allow you to totally bypass having to interface with the air system and will work very well. Hardwiring a brake controller isn't too difficult. It basically is just a matter of running a few wires. One to the positive post of the battery, one to the ground, one to the trailer connector, and then one to the stoplight circuit. I...
    view full answer...
  • How To Control The Electric Brakes On A Trailer Being Towed By Multiple Trucks With Air Brakes
    The Hayes Air Brake Control, part # HA100400C, is designed for use with air brake systems of tow vehicles and automatically operates electric trailer brakes in synchronization with air brakes. So, it will do what you're wanting. However, it is not designed to be used as a temporary braking solution, so the installation requires tapping into the vehicle's air lines. I wish there was an easily transferable solution that would do what you're wanting, but there isn't any type of adapter...
    view full answer...
  • Towing a Trailer with Electric Brakes with a Semi Tractor with Air Brakes
    To tow your trailer that uses an RV style 7-way blade style connector with your semi that has a 7-pin connector, you need to construct an adapter that will also combine the brake signal into the right and left directional signal pins. This can be done by using a female 7-pin socket # PK11720 to accept the plug from the semi, a tail light converter # 119178 and a female 7-way RV blade-style socket # PK12-707E. The converter would be wired in between both sockets to combine the brake...
    view full answer...
  • Brake Controller in a Volvo 780 VNL Semi for Towing Trailer with Electric Brakes
    Since your Volvo 780 semi has air brakes the part # HA100400C that you referenced would work well as it is designed to tap into your air brake system and apply a proportional amount of braking power to your trailer's brakes as it senses coming through your air brake system. If you are looking for the best option this is what I would go with as it's going to give you a way to apply the same amount of pressure as your semi brakes are applying.
    view full answer...
  • Mounting Bracket Installation on Hayes Air Actuated Trailer Brake Controller # HA100400C
    The U-bracket included with the Hayes Air Actuated Trailer Brake Controller # HA100400C is intended to support the controller from below and attach to the bottom of the dash. It does NOT attach to the controller in the way that typical brake controllers like the Prodigy P2 # 90885 do. The installation process of the Hayes controller includes application of double-sided tape, which is then followed by the installation of the bracket. It may be necessary to slightly adjust the shape...
    view full answer...
  • Does the Hayes Air Utility Brake Controller # HA100400C Have a Proportional or Fixed Output
    The Hayes Air Utility Brake Controller, # HA100400C, is a proportional brake controller. There is a pressure sensor in the unit that sends a certain amount of voltage back to the trailer brakes based on the amount of pressure going through the tow vehicles air brake system. The unit also has a manual override lever for emergency braking situations. In addition to connecting to the air brake system, there are also 3 wires that will need to be connected. The blue wire will go back to...
    view full answer...
  • Recommended Brake Controller for Tow Vehicle with Air Brakes
    For your 2015 F650 tow truck with air brakes, I recommend the Hayes Air Actuated Trailer Brake Controller - 1 to 4 Axles - Proportional # HA100400C. This controller senses the amount of pressure applied to your brakes and then smoothly applies the trailer brakes in proportion. It has the slide bar manual override and will work on trailers with up to 8 brake assemblies. I've attached a review video and installation instructions to assist.
    view full answer...
  • Installing a Brake Controller and 7-Way on a Vehicle that has Air Brakes
    There is no brake output circuit on a 4-Way to activate electric trailer brakes so you would have to install a 7-Way on the tow vehicle. To do this I recommend # ETBC7. With it you will plug in the 4-Way to get the lighting functions for the trailer and then the remaining connections will be hardwired including the electric brake circuit. I have included links that show and explain the ETBC7 installation. One thing to look for though is the brake controller red wire connection. Many...
    view full answer...
  • Where Does Stoplight Circuit Get Sourced for Install of Hayes Brake Controller HA100400C
    Actually when you wire in the Hayes Brake Controller part # HA100400C you use the vehicle's wiring and not the trailer wiring. You would need to find a stop light circuit for the red wire of the controller. Typically this is found at the brake pedal switch or in some case the wiring to the third brake light is used. I attached a help article on brake controller installs for you to check out as well.
    view full answer...
  • Brake Controller for Towing Fifth Wheel Toy Hauler with 2013 International Trans Tar 8600 Air Brakes
    We have two brake controllers that work well with air brake systems. I recommend the Hayes Air Actuated Trailer Brake Controller - 1 to 4 Axles - Proportional # HA100400C. This system offers both manual override and proportional braking giving your trailer brakes the same intensity as your truck. I've attached a video review to assist. If you feel comfortable working with air systems, then you can absolutely do it yourself. If you are not comfortable with that, I recommend having...
    view full answer...
  • Brake Controller Recommendation for a 2007 Prevost Bus RV Towing 16 feet Car Trailer
    All things considered I would go with a proportional electric brake controller before I would use the Hayes Air Brake Controller # HA100400C. Both offer proportional braking power for the trailer, but the electric brake controller is much less expensive and installs easier. The brake controller we recommend the most is the Prodigy P2 Brake Controller # 90885. The reason for this is because of how easy it installs and how well it works. The Tekonsha Prodigy RF Wireless Trailer Brake...
    view full answer...
  • Recommended Conversion from Air Brakes on Vehicle to Hydraulic Brakes on Trailer
    For your 2009 International 4300 with air brakes you will use the Hayes Air Actuated Trailer Brake Controller - 1 to 4 Axles - Proportional # HA100400C and then the HydraStar Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi # HBA16 or if you have drum brakes # HBA-12. This combination will convert your air brakes into a proportional braking system on your trailer.
    view full answer...
  • Brake Controller Recommend 2011 International 7400 with Air Brakes for Trailer w Electric Brakes
    For a brake controller designed to be installed on a vehicle with air brakes to control the electric brakes of a trailer you would want the Brake Controller # HA100400C. This controller will be able to sense the amount of braking pressure you are applying and will correctly apply the trailer brakes in proportion to this. I attached a review video for you to check out for this controller as well.
    view full answer...
  • How to Convert Trailers Air Brakes to Electric Brakes
    The Hayes Air Utility Brake Control # HA100400C, which you reference, is designed for towing vehicles that have air brakes and trailers that have electric brakes. If you want to convert your trailer's air brakes to electric brakes you will want to remove the air brakes and then install the electric brakes from scratch. You will need several items to add electric brakes to your trailer. Starting with the trailer you will need a hub and drum that matches the bearings and seal on your trailer...
    view full answer...
  • Wiring Install Directions for Hayes Air Brake to Electric Trailer Brake Controller
    The black wire of the Hayes controller part # HA100400C is for the 12 volt power source. This powers the controller. The red wire will need to attach to the output side of the truck or tractor's stoplight switch. White is ground. The blue wire goes to the brake output circuit of the trailer connector. This carries the voltage to the trailer brake assemblies.
    view full answer...
  • Operating Hydraulic Trailer Brakes with Air Brake System on Tractor Trailer
    You can use your tractor trailer's air brakes to activate the hydraulic brakes on your hay trailer axle by using the Hayes Air Actuated Trailer Brake Controller # HA100400C along with an electric-over-hydraulic (EOH) drum brake actuator like # HBA-12 on the trailer. The Hayes controller will take in the tractor trailer's air brake pressure and convert this to an electrical output signal. This electrical brake signal will then connect to the EOH actuator which will then in turn convert...
    view full answer...
  • Brake Controller Recommendation for Semi with Air Brakes for Trailer with Electric Brakes
    The Hayes brake controller # HA100400C is designed for exactly what you mentioned. It is designed to be installed on a vehicle like yours with air brakes to operate the electric brakes of a trailer.
    view full answer...

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Info for this part was:

Expert Research:
Jameson C
Expert Research:
Adam R
Written by:
Laura H
Installed by:
Cole B
Updated by:
Sarah W
Updated by:
Kristina F

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