1. Trailer Brake Controller
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  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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Retail:$466.37
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Trailer Brake Controller
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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
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 800-298-1624 for expert service.
  • All Info
  • Reviews (37)
  • Q & A (97)
  • Photos
  • Why etrailer?

Hayes Trailer Brake Controller - HA100400C

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

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   (37 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:

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



- HA100400C
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

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


- HA100400C
by:

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


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


- HA100400C
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.



- 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!



- 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.



- HA100400C
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



- HA100400C
by:

Works great brakes much more even the more you apply the paddle the more braking you get



- 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.



- 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.



- 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!



- 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


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


- HA100400C
by:

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



- 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.



- HA100400C
by:

Looks good



- HA100400C
by:

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



- HA100400C
by:

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



- 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!



- HA100400C
by:

Good product, works great.



- HA100400C
by:

Very happy with this brake controller.



- HA100400C
by:

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



- HA100400C
by:

Great customer service from Korrin !



- HA100400C
by:

Great Product. Fit like OEM



- HA100400C
by:

WORKS REAL GOOD APPLES BRAKES VERY EVEN LY



- HA100400C
by:

Works great, shopping and customer service top notch


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Show More Reviews

Ask the Experts about this Hayes Trailer Brake Controller

  • 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...
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    Image 1 for
  • Brake Controller for 2007 Ford F750 with Air Brakes
    The brake controller # 90195 will work with your truck. You will just have to tie the brake wire into the brake signal wire on your truck. I recommend the Hayes Air Actuated Trailer Brake Controller # HA100400C. You can add a # ETBC7 to your truck and this will allow you to plug trailers with a 7 pole plug into it. Another option that people are turning to for trucks with air brakes is the Curt Echo Wireless Trailer Brake Controller # C51180. This brake controller will plug directly...
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  • Brake Controller for Semi w/ Air Brakes Towing Gooseneck Trailer w/ Electric Over Hydraulic Brakes
    Using an electric over hydraulic brake system-compatible brake controller like the # 90885 Prodigy P2 or the # 90195 P3 would make for an easier installation than an air over hydraulic controller such as the # HA100400C which would involve tapping into the air lines for the braking system. The Prodigy or the P3 interfaces with the brake lamp switch atop the brake pedal that causes the brake lamps to illuminate when the pedal is pressed, which is a simple electrical connection. The primary...
    view full answer...
  • Using an Electric Brake Controller with the Air Brakes of a 2017 Freightliner XC-Series
    There are options to utilize the air brakes on your 2017 Freightliner XC-Series to control electric brakes like the Hayes Air Actuated Trailer Brake Controller, part # HA100400C. However, we mostly recommend just using an electric brake controller since they tie into the stop light switch of the tow vehicle, making it irrelevant what kind of brakes it has. I recommend the Tekonsha Prodigy RF Wireless Trailer Brake Controller w/ Bluetooth, part # TK94FR. It has a very simply method...
    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...
  • 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...
    Image 1 for Image 2 for
  • 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...
  • How to Tow a Trailer with Electric Brakes Using a Tow Vehicle with Air Brakes
    It sounds like you have a tow vehicle with air brakes and are trying to tow a 5th wheel trailer with electric brakes. If that is the case then you can use an air to electric brake controller like the Hayes Air Utility Brake Control part # HA100400C but this requires splicing into the vehicle's brake lines which is easy but unnerving to some. If you don't want to splice into your air lines, I recommend just using an electric brake controller like the Autowbrake Electric Brake Controller...
    view full answer...
  • 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...
  • 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...
    Image 1 for
  • 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...
  • 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...
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  • 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 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...
    Image 1 for
  • 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...
  • 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...
    Image 1 for
  • 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...
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    Image 1 for
  • Air to Electric Trailer Brake Controller
    We have the Hayes Air Actuated Trailer Brake Controller # HA100400C which is an air to electric brake controller like you need. This will connect to the air brakes of a trailer and allow you to operate electric trailer brakes.
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  • Brake Controller Recommendation for Vehicle with Air Over Hydraulic Brakes
    Easiest solution to activate electric trailer brakes is an electric brake controller. Even though you have a different style of vehicle brake system than most vehicles an electric brake controller doesn't "care" as long as you have a 12 volt system and can find a signal wire that only carries 12 volts when the brakes are applied this would be the easiest solution by far. For a brake controller I would recommend the Prodigy P3 Brake Controller part # 90195. This is our best selling brake...
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  • 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...
  • Installing a Brake Controller on a 2003 Sterling Acterra Dump Truck
    I will be happy to explain how to install an electric brake controller in your dump truck. First, if the truck does not have a trailer connector at all you will need to add a 4-Way first. If the truck has the brake lights and turn signals on the same bulb then you can use # 18252. If the dump truck has separate turn signals from the brake lights you can use # 119178KIT. Next you will need to install a 4- and 7-Way installation kit # ETBC7. This kits includes the 7-Way and the wiring/accessories...
    view full answer...
  • Brake Control Recommend for a Sterling Tractor with Air Brakes and a Trailer with Electric Brakes
    Yes, you can install this Hayes Air Utility Brake Control, part # HA100400C, onto your 2000 Sterling Tractor and it would activate your electric trailer brakes. On the Air Utility Brake Control, in addition to connecting to the air brake system, there are also 3 wires that will need to be connected and a 4th wire for the brake light switch that is optional. The blue wire will go back to the rear your Sterling Tractor and attach to brake controller circuit of your vehicles trailer...
    view full answer...
  • Brake Controller Recommendation for a 2015 Freightliner Coronado with Air Brakes
    For your 2015 Freightliner Coronado with air brakes you can still use a regular electric brake controller if you have a brake light wire to splice into. The type of braking system on the tow vehicle will not determine the type of controller you can use. We do however have the Hayes Air Actuated Trailer Brake Controller # HA100400C which is designed for this application. A brake controller will have to be hardwired in since there isn't a plug and play harness for your truck. The first...
    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...
  • 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...
  • 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...
  • 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...
  • Can an Electric Brake Controller be Used on a 2004 Freightliner Columbia with Air Brakes
    You can install a brake controller on a large vehicle with air brakes like your 2004 Freightliner Columbia. The only issue that you might run into is you may not have a brake switch at which to get the proper signal for the brake controller red wire. In that scenario you would need to find another dedicated, brake light only circuit somewhere. There isn't a plug-in wiring harness available for this particular vehicle so the controller will have to be hardwired in. White is ground, goes...
    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...

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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 Laura H
Written by:
Laura H
Employee Cole B
Installed by:
Cole B

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