Dexter Trailer Breakaway Kit with Built-In Battery Charger - Top Load

Dexter Trailer Breakaway Kit with Built-In Battery Charger - Top Load

Item # 34-285

lowest price pledge


Our Price: $103.30

You Save: $16.24
Trailer Breakaway Kit

This item qualifies for Free Shipping

Shipping Weight: 6 lbs

Arrives before Christmas with Ground or Free Shipping.
In Stock
34-285 - Top Load Dexter Axle Trailer Breakaway Kit
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
Please enter a valid email address.

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.

pop out icon replay 360 icon
horizontal rotate icon

Product Images

In Use/Installed

Breakaway system is designed to bring a trailer safely to a stop by activating its brakes should it become disconnected while being towed. Built-in charger refuels the included rechargeable battery. Lowest Prices for the best trailer breakaway kit from Dexter Axle. Dexter Trailer Breakaway Kit with Built-In Battery Charger - Top Load part number 34-285 can be ordered online at or call 800-298-8924 for expert service.
  • All Info
  • Reviews (10)
  • Q & A (39)
  • Videos (3)
  • Photos
  • Why etrailer?

Dexter Axle Trailer Breakaway Kit - 34-285

  • Kit with Charger
  • Dexter Axle
  • Top Load

Breakaway system is designed to bring a trailer safely to a stop by activating its brakes should it become disconnected while being towed. Built-in charger refuels the included rechargeable battery.


  • Breakaway system activates your trailer's brakes if the trailer disconnects from the tow vehicle
    • Designed for use with Dexter electric-over-hydraulic brake actuators (K71-650 and K71-651)
  • Built-in charger automatically refuels battery while connected to tow vehicle
  • Top-loading case is easy to access from above
    • Weather-resistant polymer construction protects battery from moisture and debris
  • Lockable lid deters theft (padlock sold separately)
  • Breakaway switch installs on your trailer's frame - drilling is required
  • Department of Transportation (DOT) compliant
  • 12-Volt lead-acid battery is included
  • Made in the USA


  • Application: single- and tandem-axle trailers
  • Case dimensions: 6-5/16" long x 3-3/4" wide x 5-3/4" tall
  • Mounting hole spacing:
    • 7" From center of hole to center of hole horizontally
    • 3" From center of hole to center of hole vertically
  • Battery capacity: 9 amp-hours

Note: A breakaway system is required by law in most states for trailers that are equipped with electric brakes and have a GTW of at least 3,000 lbs.

034-285-00 Dexter Trailer Breakaway Kit with Built-In Battery Charger - Top Load - 9 amp/hrs

Video of Dexter Trailer Breakaway Kit with Built-In Battery Charger - Top Load

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Dexter Axle Trailer Breakaway Kit - Kit Only - 34-285 Review

Today we're going to review part number 34-285. This is the Dexter breakaway kit. This breakaway kit is designed to bring trailers safely to the stop by activating the brakes should the trailer be disconnected while you're driving. This type of safety system is required in most states on trailers that are rated over 3000 pounds. This particular breakaway kit is designed to be used with the Dexter electric over hydraulic brake actuators, part number K71-650 or K71-651. Both of those we do sell separately on our website. This breakaway kit has a 9 amp hour capacity.

It comes with everything shown here. Comes with the battery charger, comes with the sealed 12-volt rechargeable battery, has this nice lockable weather resistant battery box, see where the battery goes in there. Comes with the breakaway switch and the cable. This box can be mounted on the trailer jack or your trailer frame. This kit is designed to work with single and tandem axle trailers with electric brakes and this kit does Department of Transportation specifications. Basically once your box is mounted, your battery would drop right into there and your wires would come out the side here.

Basically when you go to wire this up, now this part right here when you hook it up will help recharge the battery. Basically when you hook this up the black wire goes to your 12-volt power from the trailer vehicle harness. The white wire right here, this attached to the negative post of the battery, this would go to the trailer ground harness and then this black or this orange wire with the black stripe will attach to the orange wire with the black stripe wire coming out of the breakaway switch and the remaining wire, which is the blue wire from the breakaway switch, that'll go to your trailer electric brake feed. Once this is all attached and bolted down, basically this would be attached on to your trailer, you'd run this length of cable, this would actually insert into there and you push it all the way in, it takes about 20 pounds of pressure to pull this out. This part of the cable would attach to your vehicle so basically what happens is if you get into a situation where your safety chains don't work, the trailer breaks away, it would pull this out of here and that would make the brakes activate and stop the trailer from a runaway situation. That should do it for the review of part number 34-285. This is the Dexter breakaway kit.


Customer Reviews

Dexter Trailer Breakaway Kit with Built-In Battery Charger - Top Load - 34-285

Average Customer Rating:  4.8 out of 5 stars   (10 Customer Reviews)

Breakaway system is designed to bring a trailer safely to a stop by activating its brakes should it become disconnected while being towed. Built-in charger refuels the included rechargeable battery.

- 34-285

Products are as described and good quality and like the products that e-trailer carries. Shipping was very fast and like the videos a lot that describe many of the items they carry which helps me determine which products to buy based on my needs. 597586

- 34-285

I used this unit to pair with the Dexter DX Series Electric Over Hydraulic Brake Actuator, as it directly called for a 9mAh backup. This unit works as advertised, and the switch and wiring were easily identified and match the directions that come with the Dexter unit. The only reason I give this unit 4 stars instead of 5 is that it doesn't come with a battery charge indicator, which nearly every other 5mAh unit does. It would be really nice to be able to check the charge of the battery, without having to activate the emergency pull. Just a personal preference, but seems like a missing feature since all the 5mAh options have it. 617911

- 34-285

Excellent service, great product... 707268

- 34-285

I have never been so happy with the Dexter Product that I have installed. I have told everyone. Thank you so much. Your concern for me as a customer is second to none. Thank you at Dexter for the great design and ease of installing. I own a 4 axel boat trailer with Dexter Elec over Hyd Disc on all 4 wheels. Thank you and hope we all have a safe summer. 633766

- 34-285

This is not my first order with etrailer I have always had great service and products received as promised. 519383

- 34-285

Products as described on line. Orders processed and shipped same day as my order. Trailer break away kit wiring instructions not clear, but that is a mfgr issue. etrailer had correct diagram on line with wires correctly identified by color. 515602

- 34-285

Used it with the HBA-10 Hydrastar actua tor 476095

- 34-285

Easy to install built to last. 394438

- 34-285

The five stars are for etrailer service and shipping. My dexter k71-651 e/h controller and the dexter breakaway 34-285 were well packaged and great shipping lables. A phone call after my online order to confirm mailing address and follow-up e-mail my parcel was on its way. UPS tracking ,my SCC parcel pick-up in port huron michigan and my son crossing the borderI had my parts within 48hrs (duty paid). I would like to follow-up with photos of my installation. The dexter E/H controller and breakaway switch is replacing an vacumm / hydraulic disc brakes on in my yard NEW 1977 31ft airstream trailer, This trailer is replacing my 78 airstream that was gutted by fire with a auto parts store solar panel battery maintaining system. Thats another story. THANKS ALL 383764

- 34-285

Like the product. Everything was with the product when I received it. Diagram was easy to follow to setup the unit. 275045


Ask the Experts about this Dexter Axle Trailer Breakaway Kit

Do you have a question about this Trailer Breakaway Kit?

  • Trailer Breakaway Kit Recommendation with 9 amp Hour Battery
  • We don't have a 9 amp hour battery to swap into the battery box of the Engager but I do have a great solution for you. The Dexter Breakaway Kit part # 34-285 is a kit that comes with a 9 amp hour batter and a box large enough to fit the battery size.
    view full answer...

  • Troubleshooting Locked Brakes on 2013 Forest River Salem Travel Trailer
  • If the electric drum brakes on your Forest River Salem travel trailer are locked up then the first thing you can check is the breakaway switch and battery which provide emergency braking in the event of a vehicle/trailer disconnect. it is possible that your breakaway switch has been tripped/damaged or that there is a wiring issue in that system that is sending power to the brakes. First, disconnect the trailer plug from the tow vehicle socket to prevent any chance of your vehicle's brake...
    view full answer...

  • Recommended Hydraulic Actuator to work with Kodiak Disc Brake Kit for a 8,000 Pound Axle
  • The electric over hydraulic brake actuator I recommend is the Dexter # HBA16 (1,600 psi) as it is compatible with the Kodiak disc brake set # K2HR858DE. See the diagram I included of how the unit needs to be wired. This actuator requires a minimum 9 amp/hour breakaway kit like # 34-285. As a side note, you must use a brake controller that is compatible with electric over hydraulic brakes. Just in case you don't have one, I recommend the Prodigy P3 # 90195 because it's very user friendly...
    view full answer...

  • Can Dexter Breakaway Kit for Electric Over Hydraulic Actuators be Used with Regular Electric Brakes
  • Not to worry because you can use breakaway kit # 34-285 with regular electric brakes too. I called Dexter and they confirmed this. So you are good to go you would just omit the electric over hydraulic actuator part of the diagram for installation.
    view full answer...

  • Parts Needed to Add Disc Brakes to Trailer with Dexter 12K Axles w/ Electric Drum Brakes
  • The Kodiak # K2R1258L12 Disc Brake Kit is compatible with a 12K Dexter axle with a 7-bolt brake mounting flange. Your current wheels/hubs should have an 8 on 6-1/2 inch bolt pattern. You'll also need an electric over hydraulic brake actuator, a brake line kit, a break away system and a brake controller that's compatible with electric over hydraulic brake systems. For the electric over hydraulic actuator, I'd recommend going with the Hydrastar # HBA16. Our install techs have found...
    view full answer...

  • Brake Lines and Fittings for electric Over Hydraulic Brakes on a 40 Foot Tandem Axle Trailer
  • Basically you will run the lines back and T-off where needed. A kit like # 9579-2 would work though you may need to add additional brake line (available and auto parts stores) to complete the installation. I have included a picture that shows a basic set up. A system with 1,000 psi is fine for drum brake applications. Since some pressure is always present in the wheel cylinders in drum brakes, larger psi capacities are not needed. I have included a link to the drum brake electric over...
    view full answer...

  • Recommended Parts To Convert Surge Brakes To Electric-Over-Hydraulic Brakes On Tandem Boat Trailer
  • Since you have hydraulic brakes on your trailer, there are only a couple things you will need. The first thing I recommend is the Electric Over Hydraulic Brake Actuator, # K71-651. You will want to make sure you mount this unit as far forward on the trailer tongue to avoid getting it submerged. You will need a brake controller for electric-over-hydraulic systems like part # 90195. This is one of our best brake controllers because it is easy to install and operate. The breakaway...
    view full answer...

  • HydraStar Actuator Breakaway Kit Option
  • If you wanted to order the HydraStar # HBA16 with a breakaway kit you would instead want the part # HS381-9067 which also comes with wiring and a junction box. Otherwise the breakaway battery part # 34-285 would work well as it has more than the needed amp rating.
    view full answer...

  • How To Install and Operate Dexter Electric Over Hydraulic Brake Actuator
  • To install the Dexter Electric Over Hydraulic Brake Actuator, part # K71-650, you would need to install a brake controller that is compatible with a electric over hydraulic brakes and then part # K71-650. To install part # K71-650, you must use at least a 9 amp/hour breakaway kit, like Dexter Breakaway Kit, part # 34-285. To hookup part # K71-650, you will connect the Yellow wire to cold side of breakaway switch, which is the wire that is hot when breakaway occurs. The Black Wire connects...
    view full answer...

  • Compatibility of OEM Brake Control on 2015 Silverado w/ Dexter K71-651 Electric/Hydraulic Acuator
  • The GM ITBC (integrated trailer brake controller) in your 2015 Chevy Silverado 2500 is indeed compatible with the Dexter # K71-651 Electric Over Hydraulic Trailer Brake Actuator. You'll also need a break away kit with a minimum 9 amp/hr battery, like part # 34-285.
    view full answer...

  • Conversion of Air Over Hydraulic to Electric Over Hydraulic Brakes
  • Thanks for including a picture! Actually, the electric over hydraulic actuators have their own reservoir as the brake line connects directly to the unit. The integrated brake controller you have isn't compatible with electric over hydraulic because it won't activate the actuator properly. If you provide me the year of your Ram, I will be more than happy to recommend a brake controller. However, one of our most popular brake controllers is the Tekonsha Prodigy P2 # 90885. It includes...
    view full answer...

  • Compatibility of Dexter EOH Brake Actuator K71-651 With Factory Brake Controller on 2015 Ram 2500
  • According to my Dexter representative, their # K71-651 Electric Over Hydraulic Brake Actuator is indeed compatible with the factory installed brake controller on your 2015 Ram 2500. I'd also recommend a breakaway kit, part # 34-285.
    view full answer...

  • Converting Military Trailer Air Over Hydraulic Drum Brakes to Electric Over Hydraulic
  • You are correct, there are 4 electric over hydraulic braking systems, from 3 manufacturers, that can be used to eliminate the air over hydraulic actuator on your M200A1 trailer. These systems all require a breakaway system to meet DOT safety standards. I will detail each system for you so you can select the one that will work best for your truck and trailer setup. First, the Dexter Electric Over Hydraulic Brake Actuator, # K71-650, would be a good choice because it will work with the...
    view full answer...

  • Why do Trailer Electric Over Hydraulic Brakes only Operate if Break-Away Battery is Fully Charged
  • Your Dexter Electric Over Hydraulic Actuator # K71-651 will need your breakaway battery to be fully charged to operate as you've figured out I'm sure. It sounds like the problem is that your 12 volt power circuit on your 7-way is no longer functioning and its not charging the battery so its dying. Most likely there is a blown fuse on your 12 volt trailer circuit and because of that the breakaway battery is dead and your electric over hydraulic actuator is no longer working. The amperage...
    view full answer...

  • Troubleshooting EOH Actuator That Will Not Release Brakes
  • If your EOH brakes will not disengage the problem could either be mechanical, as in a malfunction with the master cylinder, a clog in the hydraulic lines or broken parts in the brake assemblies themselves. Or it could be electrical in origin, meaning that electrical power is reaching the actuator when it should not. Troubleshooting this type of problem is easiest if you disconnect the trailer and test the tow vehicle and trailer separately. If the brakes release when you unplug the...
    view full answer...

  • Troubleshooting a Trailer Brake Actuator
  • The Dexter E/H 1000 you referenced like # K71-650 could certainly be worn out. 10 years is a good lifespan. I would check the fluid levels and ensure there isn't any cut or frayed wires. Also, you will want to ensure the 12 volt battery the actuator is attached to should be fully charged. A depleted trailer battery could cause the unit to stop working. And lastly, there could be an internal short within the actuator. These reasons could be the cause of the intermittent working and not working. If...
    view full answer...

  • How To Use an Electric Brake Controller With Hydraulic Brakes On Tandem Axle Boat Trailer
  • Your boat trailer has hydraulic surge brakes that uses a surge coupler to activate the trailer brakes. An electric brake controller will activate the brakes by using an electric current, so you will have to either replace the hydraulic brakes on your trailer with electric brakes or use an electric over hydraulic brake actuator like the Dexter Electric Over Hydraulic Brake Actuator, part # K71-650. To use the Dexter actuator you will need to make sure your brake controller can be...
    view full answer...

  • How to Remove Trailer Break Away System Cable From Vehicle When Unhitching Trailer
  • You won't want to remove the break away pin from the switch, as this would activate the trailer brakes and run down the break away system's battery. You'll want to remove the cable from the safety chain loop on the vehicle. The easiest way to do that would be to remove and discard the existing break away cable like # 34-285 and install the # FA80-01-2140 Fastway Zip Coiled Trailer Breakaway Cable. Attach the split ring to the break away pin and the carabiner to the safety chain loop...
    view full answer...

  • Troubleshooting Electric-Over-hydraulic Brakes On Trailer
  • There might be an easy way to solve this issue. Is the display on your brake controller red? If so, then it is probably the older Prodigy model and will not work for the electric-over-hydraulic system you have on your new trailer. That would explain why it works on your horse trailer with electric brakes. It still receives the current from the brake controller, but the controller is not designed to work with electric-over-hydraulic systems. If you have a blue display, then you probably...
    view full answer...

  • Brakes Not Activating When Breakaway On Dexter Breakaway Kit # 34-285 Is Pulled
  • I contacted our representative at Dexter about the issue you were having with the Dexter Breakaway Kit # 34-285 on you 36 foot tandem axle gooseneck trailer. The Dexter representative informed me that the Breakaway Kit is not designed to lock up the brakes, but to stop the trailer. If you have electric brakes on your trailer, you will have to roll the trailer about a foot or two for the electric magnet in the brakes to activate. If, after rolling the trailer the brakes do not activate...
    view full answer...

  • Is a Parking Brake Required for an Electric Over Hydraulic Trailer Braking Setup
  • It would not be required that your trailer have a parking brake when using an electric over hydraulic braking system. You may be thinking of a breakaway system that will stop the trailer in the event of it becoming uncoupled from the tow vehicle. The Dexter Electric Over Hydraulic Brake Actuator, part # K71-651, for the disc brakes will require a minimum 9 amp/hour breakaway kit like the Dexter Breakaway Kit, part # 34-285. This breakaway kit is designed to work with the Dexter...
    view full answer...

  • Will Titan BrakeRite Actuator # T4813100 Work on a 2010 Dodge Ram with a Brake Controller
  • The Titan BrakeRite Actuator, part # T4813100, will work with an aftermarket brake controller on your 2010 Dodge Ram towing an Airstream trailer with disc brakes. If you have the factory brake controller on your Dodge Ram you will also need to use the Titan BrakeRite EHB Adapter, part # T4846000. This adapter allows the factory brake controller, which is designed to only work with electric brakes, to be able to communicate with the BrakeRite actuator that is designed for electric-over-hydraulic...
    view full answer...

  • Will Factory Brake Controller 2015 Ford F150 Work w/ HBA-12 Electric Over Hydraulic Brake Actuator
  • The OEM brake controller on a 2015 Ford F150 is compatible with the Hydrastar Electric Over Hydraulic Brake Actuator, part # HBA-12. A wiring kit like # HS381-9000 would be an excellent addition. Many different break away kits would work, but I like the # 34-285 from Dexter Axle because it provides a 9 amp/hour battery, almost twice as powerful as what's seen from the 5 amp/hour batteries provided with other break away systems.
    view full answer...

  • Recommendation of Electric Over Hydraulic Actuator For 6,000-Lb Tandem Axle Trailer with Disc Brakes
  • For an electric over hydraulic brake actuator for your 6,000-lb tandem axle boat trailer with disc brakes, I have the Dexter Electric Over Hydraulic Brake Actuator, part # K71-651, that you have referenced and the Carlisle HydraStar Electric-Hydraulic Actuator, part # HBA16. They will both require a breakaway kit like the Dexter Breakaway Kit, part # 34-285, or the Carlisle Breakaway Kit, part # HBA-EBA. The breakaway kit is required to apply the trailer brakes should the trailer become...
    view full answer...

  • Will Existing Break Away Kit Work When Converting Electric Brakes To Hydraulic Disc Brakes
  • The break away kit you have on your trailer should be fine if you have at least 9 amp/hour on your system, as this is what is required by the Dexter Brake Actuator, part # K71-651. It sounds as though you should be okay with two batteries hooked to your system now. If you are using the trailer connector for your batteries, they will only have the charge maintained, and will not increase the charge of the batteries. I have attached a link to our product page for battery chargers. If your...
    view full answer...

  • Wiring the Breakaway Switch to Dexter Electric Over Hydraulic Drum Trailer Brake Actuator
  • The orange/black wire does connect to the positive battery terminal on the breakaway battery from kit # 34-285. The blue wire connects to the yellow wire on the actuator, # K71-650. I have included a picture showing how everything gets wired up.
    view full answer...

  • Selecting Breakaway Kit and Replacement Brakes for 8 X 16 Enclosed Trailer
  • A trailer breakaway kit such as the Dexter Kit # 34-285 that you referenced should be selected based on the type of brakes on your trailer. If it uses electric-over-hydraulic brakes then the Dexter's higher 9-amp-hour capacity is called for. Your axles' capacity should be indicated on a sticker or plate attached to them. Once you know the axle capacity and type of brakes (electric or hydraulic) you can use the link provided to view our replacement brakes. Filters in the left margin will...
    view full answer...

  • Replacement Breakaway Cable for Trailer with Dexter Brakes
  • I do have options for you but just because the trailer has Dexter brakes does not mean it will also have a Dexter breakaway kit. If you want to replace just cable and pin then I will need to know the brand and model of your breakaway kit which can be found on the top of the switch. That said, breakaway kits are universal so it would be easiest to just replace both the switch and cable/pin with the Replacement Breakaway Switch with Cable and Pin part # K71-691. There are only two wires that...
    view full answer...

Do you have a question about this Trailer Breakaway Kit?

  • Why

    At we guarantee:

  • Highest quality trailer breakaway kit 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 trailer breakaway kit 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:
Reno H
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Jeffrey L
Video Edited:
Dustin K
Updated by:
Sarah W
Updated by:
Brian T
Test Fit:
David F

At 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.