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Pro Series Push to Test Breakaway Kit with Premium Integrated Charger

Pro Series Push to Test Breakaway Kit with Premium Integrated Charger

Item # 50-85-315
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Pro Series Trailer Breakaway Kit - 50-85-315
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Lowest Prices for the best trailer breakaway kit from Pro Series. Pro Series Push to Test Breakaway Kit with Premium Integrated Charger part number 50-85-315 can be ordered online at or call 1-800-940-8924 for expert service.
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Pro Series Trailer Breakaway Kit - 50-85-315

  • Kit with Charger
  • Pro Series


  • Push to Test: LEDs indicate fully charged, charging or recharge
  • Breakaway system for 1 to 3 axle trailers with electric brakes
  • 5-Amp battery included
  • Built-in multi-stage battery charger offers a fast charge to quickly bring voltage up
  • For up to 3 axles
  • Limited 1-year warranty

5085315 Pro Series Breakaway Kit with Premium Integrated Charger

50-85-315 Pro Series Push to Test Breakaway Kit with Premium Integrated Charger

Installation Details 50-85-315 Installation instructions

Video of Pro Series Push to Test Breakaway Kit with Premium Integrated Charger

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

Video Transcript for Review of Pro Series Trailer Breakaway Kit - Kit with Charger - 50-85-315

Jeff: Hello everybody. This is Jeff at Today we're going to take a look at this Reese Towpower Push to-Test Breakaway Kit with the Integrated Charger. Now, this breakaway system will activate your trailer's electric brakes if your trailer happens to disconnect from your tow vehicle. It does include this 12-volt rechargeable battery in the box with the charger and the breakaway switch with the cable.Now, this is a push-to-test battery feature on the top here, which will offer fast and easy battery testing. This test button right here, the blue button, it says push to test, this will indicate with LED lights if it will display the battery status.

So right now if I push it, I don't know if you can see it, but I push it and you can see the green button over here is lighting up. The green means that it's charged, so it's 12.8 volts or higher right now. If I pushed it and it showed yellow, that would mean it would be charging. And then if I pushed and it showed red, that would mean low battery and it needs to be charged.It does have a built-in charger which will automatically refuel the battery. It has a float mode which will maintain voltage while you tow without overcharging to prolong battery life and then a smart adjust feature which automatically switched to the float mode when the battery is fully charged.

This is a top loading case. You can see right here, you just push in on it. I'm going to pop it open for you. There you go. If you push it in, it'll pop open.

There's your battery and your connections all made and then when you close it, it'll snap shut. If you notice, it's a nice polymer construction, protects the battery from moisture and debris.Now the mounting hardware to install this is not included and this is a lockable lid. You can see the holes line up here. You could actually put a padlock through there to prevent theft. The padlock we do sell separately.

Also on top of the lid, they do have the wiring code. It shows you that to white wires . There's three wires that need to be connected. The white wire goes to ground, the black is to the battery for power and the blue goes to one of the wires on the breakaway switch. Now this breakaway switch this will install on your trailer's frame. Drilling is required to install this.You can see this cable here. This will attach to your tow vehicle and what happens in a runaway situation where it comes disconnected, it would pull this pin out which would activate the brakes to stop the trailer. There are two black wires on this. One goes to the blue wire on the battery box and the one connects to the electric brake trailer feed. The wire feed length on these is about 7-1/2" and the cable length, if I undid that, it would go out to about 4' long. Now, this is DOT, Department of Transportation compliant application. Application - this is for single, tandem and triple axle trailers with electric brakes. The battery capacity in this is 5 amp hours.Give you a few dimensions on this, on the battery box itself. Overall length, top is about the widest. It's 5-1/2". Width on it, 4-1/4" wide and the overall height is about 4-1/4" tall. The mounting holes on the back here that should mount to your trailer, distance between those center-to-center horizontally is about 5-5/8". And vertically center-to-center is right about 1". It does come with a nice set of detailed instructions that'll describe how everything hooks up and how it operates. But that should do it for the review on the Reese Towpower Push-to-Test Breakaway Kit with the Integrated Charger.

Customer Reviews

Pro Series Push to Test Breakaway Kit with Premium Integrated Charger - 50-85-315

Average Customer Rating:  4.8 out of 5 stars   (132 Customer Reviews)


Easy installation; Works as advertised! I added this to electric-over-hydraulic disc brakes on my 18' boat trailer to replace surge brakes. I highly recommend this system. My thanks to George for the help!

Huge improvement over surge brakes! Great addition to my boat trailer - Im in complete control!
Jeff - 03/09/2022


I installed the breakaway kit on my sailboat trailer. The trailer is completely submerged for launching and loading. The shape of the case allowed for attachment to the trailer so that the battery may be easily removed and reattached when it’s submerged.


just like the quality of material used and ease of installation


Nice product but poor packaging by trailer. Product arrived damaged and since I needed to use my trailer the next day, I repaired it myself. Etrailer should have place the thin product box inside a better shipping box. They may have saved cost on their end but now have an unhappy customer.

So far so good, i trust it to be a solid unit should i ever have a breakaway.
Sal F - 05/26/2016


Both Products arrived in a timely matter. Packaged to be shipped safely and received in excellent condition. Extremely simple to install in about 30 minutes time. Highly recommend the products and etrailer .com to everyone who asks me where to get trailering products and equipment needed to tow their trailers safely.


This was very easy to install and works great. I put it on a boat trailer and has been under water several times, no issues. The level check is great for piece of mind, and knowing you need to throw it on a charger at the beginning of the season.


I was recommended this drop hitch by an etrailer employee (to use with a trailer that I completely refurbished, with parts almost exclusively from, and have been using it for a year now. It has been absolutely fantastic, and just what I needed. I am always confident that I'm using a quality product to tow my trailer with, which is imperative when my fur babies are along for the ride! My only complaint, is that the hitch does not come with a square cap to prevent water from sitting within the tubing of the hitch - it's cheap and not hard to find, but would be nice to accompany the hitch at the time of purchase.


I have been having trouble with my trailer brakes and noticed that the existing battery was no longer bolted to the trailer, but was loose in the storage compartment. Since it was several years old I decided to replace the whole system. The new one has a charging system , which will keep the battery charged. I will have to do some rewiring,but that will not be a problem. Thanks . This looks like a good system and i can't wait till I get some good weather to work on the trailer.

If you click the provided link, you can see our help article about trailer breakaway systems.
-- Etrailer Expert Mike L - 12/21/2018


Great website, easy to find what you need
Check out is fast
Delivery was on time
Phone no. available for questions or problems
Would recommend to a friend


Very easy to install. The quality looks to be very good.


This is a direct replacement for the unit that came with my trailer. Came in perfect working order and battery was fully charged. Would buy again when the need arises.


This break away kit is nice and easy to install. The indicator buttons on the top, are a really nice feature. It works good.


Wow, can't believe it has already been a year...This item replaced a VERY old system that had served me well...Easily installed...Luckily, have not had to try it out, but with the handy battery condition check button, I know the battery is charged and ready to work if needed.


Can't really say much except no issues! Good instructions. Good price from etrailer. Complete kit... Hopefully I will never have to find out "how well" this works. I like the charge indicator light. I'd say very good product for a very fair price for a lot of insurance (and required in CA). A year with no issues. Battery charges. Light indicates. Decent enough instructions to wire it up. "Easy and done"


The breakaway kit is exceptionally well made and priced far below most other suppliers of trailer parts.

A year later and its in perfect shape. The good news is that I havent had the need for the kit, but I know its ready should the trailer come loose.
Mike - 06/01/2020


Battery was fully charged when received, but put it on a float charger for a day just to be sure. Nice kit, easy to check the charge using the button and LED indicator on the top of the battery box. Install was easy (deciphering the rats nest of wiring in my cargo trailer was another story - thanks Pace America!). Should work well going forward and will be easy to check the charge before trips, like the fact that the controller will handle charging the battery while underway on the road as well.


I have not installed the break away switch

installation kit (wiring harness) was time consuming. All parts required were provided. The instructions were clear and concise.

Brake controller is well design with all necessary features. Instructions were easy to understand. Easy installation.


I have not installed the break away switch

installation kit (wiring harness) was time consuming. All parts required were provided. The instructions were clear and concise.

Brake controller is well design with all necessary features. Instructions were easy to understand. Easy installation.


Easy install works great! fair priced products!

great, holding up well.
Jim M - 04/29/2021


This was a great replacement for the old battery box that came on the trailer. I like that it charges the battery. There is a light on the top that doesn't serve a purpose really, It tells you that the battery is charging. There is a button to push to view it the battery is charged or charging, I am always worried that the light staying on will drain my battery on my truck.
Other then the light staying on I would have given it 5 stars.


I have been working on a horse trailer rebuild. I recently purchased brake drum assemblies, For this order I needed support to help determine the proper parts for the brakes. John provided a fast, knowledgeable response that helped insure that I was ordering the correct part numbers for my trailer. As usual, the order was processed quickly and was delivered fast. All the parts were delivered complete and no damage. Product quality is exceptional.


The breakaway battery and charge works great! It keeps the battery charged all the time. I don't have to charge the battery with another charger its automatic as long as you use the trailer once in a while or at least hook it up to a vehicle for a while.


The product was received and was as described on the website. Installation was easy, but only due to using the video from etrailer. The enclosed instructions had different wire colors than what was on the unit. I then referred to the video and all was well. I find etrailer to be a great resource for both parts and install questions. Their tech staff is top notch, and they speak English....


Product was exactly as described, easy to install, with great instructions. Everything I needed to complete installation on my livestock trailer. Battery charges while hooked to tow vehicle, and is still working great!


I have not installed this yet, but it is built well. All of the internal wiring is complete and it includes the battery. There are only 3 wires that exit the box that need to be hooked up to the trailer.

Show More Reviews

See what our Experts say about this Pro Series Trailer Breakaway Kit

  • How to Tell if Breakaway System Came On After Pulling Trailer with Breakaway Pin Pulled
    If you were dragging the camper you would probably have noticed. The tires would also have flat spots. But if the brakes were worn and not adjusted out then the tires could have kept rolling. The drums though would have been extremely hot and you would likely see discoloration on the armature surface in the drum (the armature surface is where the brake magnet makes contact with the drum). It is also possible that the breakaway system didn't do anything. That could happen because of a depleted...
    view full answer...
  • Breakaway Switch Installation
    The breakaway switch on the Pro Series Push to Test Breakaway Kit with Premium Integrated Charger # 50-85-315 will need to be attached the same way it was installed. The accompanying photo is a cutout of the linked instruction manual which details how to install the breakaway switch. What follows is what it says: - Switch location should be selected to ensure unobstructed line of pull in event of vehicle separation. - Bolt breakaway switch bracket to frame of trailer or battery case bracket...
    view full answer...
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  • Breakaway Kit Recommendation for 2006 Fleetwood Trailer
    Breakaway kits are universal since they all install on trailers in the same way. They are required too by law so you will want to install a kit on your 2006 Fleetwood like the # 50-85-315 which is our most popular and highest rated. I attached an install video for this kit for you to check out as well.
    view full answer...
  • Can Breakaway Battery Be Submerged on Boat Trailer
    The battery/battery box for the Pro Series Breakaway Kit # 50-85-315 that you referenced (along with most other units) is weatherproof meaning it's designed to be mounted outside and can handle exposure to rain and splashes but it's not waterproof. Because of this I don't recommend actually submerging this or any other breakaway battery for even a short period of time. I know it will mean moving it to a less convenient location but I highly recommend mounting the battery in a higher spot...
    view full answer...
  • Can Trailer Breakaway Kit Use Battery of Trailer
    DOT really will only care that the breakaway system battery will be capable of holding the trailer brakes fully engaged for at least 15 minutes at any given time. It's wiser to use a dedicated battery for this so that you don't deplete the main trailer battery with other accessories and then when needed it not be able to fulfill it's duties to stop the trailer. I'd recommend using a kit like the part # 50-85-315 that you referenced which includes a dedicated battery.
    view full answer...
  • Should Pin of Trailer Breakaway Kit be Able to be Pulled and Trailer Move
    Sounds like your breakaway battery is dead and that's why even with the pin pulled the brakes aren't locking up like they are supposed to. You'd still be able to tow your trailer around as it is but by law you are going to need to have your breakaway system working. For safety reasons and because if DOT pulls you over and checks your breakaway system like they sometimes do you'll get in some trouble if it's not working. Or you may just want to replace the entire thing with the part # 50-85-315...
    view full answer...
  • Can Trailer Break-Away Kit Battery Box Be Mounted at Any Angle
    The battery included in the Break-Away Kit # 50-85-315 is a sealed-type power cell that can be oriented in whatever manner is most convenient for your particular trailer application. The included u-bolt hardware allows mounting on either the trailer frame or the jack tube.
    view full answer...
  • Do Trailer Breakaway Systems Usually Power from Separate Trailer Battery
    Typically breakaway systems on trailers like yours will be powered from a separate smaller battery than the two larger ones you have on your trailer. You can trace the wiring of the switch back to see where it ends, but typically the breakaway system is in a box that is somewhat near the nose of the trailer. I attached a chart that shows how a breakaway system usually wires up as well. I also attached a help article on trailer breakaway systems for you to check out as well.
    view full answer...
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  • Do Drum Brake Assemblies Have Emergency Brakes?
    For an emergency brake system, we recommend a break away kit like the Pro Series # 50-85-315, because trailers aren't designed exactly like passenger vehicles that come equipped with an extra parking brake. This breakaway kit has a battery attached and will send a power signal to your brakes to engage when the unit senses the pull cord has been removed. I have linked a helpful picture of what the inside of the pull pin unit looks like for you to better understand how it functions. The...
    view full answer...
    Image 1 for
  • Where to Attach Break Away Cable for Pro Series Breakaway Kit # 50-85-315
    The breakaway cable assembly that is part of the Pro Series Breakaway Kit # 50-85-315 will mount to the front of your trailer tongue so that the vehicle end of the cable can reach to the safety chain hook on the tow vehicle. If you click on the link provided you can see the entire installation process for this kit on a goose neck trailer. Even if your trailer is a different type the installation steps are the same. The video also includes instructions on how to wire the breakaway to your...
    view full answer...
  • Length Of Safety Cable on Trailer Breakaway System Recommendation
    The best length for the cable of a breakaway system like the Tow Ready Trailer Break Away Kit # 50-85-315 that you referenced will be slightly longer than the safety chains. The breakaway cable should be longer than the safety chains according to RVIA Recreational Vehicle Industry Association. This will activate the brakes in the event you lose the trailer connection and the safety chains fail.
    view full answer...
  • Do All Trailers with Electric Brakes have to have a Breakaway System
    No, but your local and state laws may require one. You will need to check anywhere you will be towing the trailer to determine if a breakaway system is required by law. They are also just a good idea in general because they will stop a run away trailer should it get disconnected from the tow vehicle. We have several different breakaway options which I have linked to the right. I have also included a link to our help article on breakaway systems for you.
    view full answer...
  • Should Charge Light Stay Lit on Tow Ready Breakaway System when Disconnected from Tow Vehicle
    No, the charging light on the Tow Ready breakaway system should turn off if it is not getting a charge from the vehicle. If it stays lit up that could indicate a short somewhere that is drawing power. It could be due to corrosion in the trailer side connector. Make sure the trailer side connector is clean and free of corrosion inside and out. Check all connections for any loose or pinched wires/connections or frayed wires that might be touching bare metal. It could also be a ground issue....
    view full answer...
  • What are the DOT Requirements for Trailer Breakaway Systems for Miltary Trailers
    I can certainly help. You will want to look at DOT/FMCSA regulation 393.43, specifically paragraph (d). This regulation should have everything that you need for what the Navy requires. In general, a breakaway system needs to be sufficient enough to apply the trailer brakes on fully for at least 15 minutes.
    view full answer...
  • Brake Controller Does Not Detect Trailer when Breakaway System is Connected
    The most common issue with breakaway systems occurs because of the wiring. They do not always make it as straight forward as it could be. Starting from the trailer side connector the brake output wire will go to the brakes and to the breakaway switch. The other wire from the switch will go to the brake output wire on the breakaway battery. The power wire to charge the breakaway battery will connect to the 12 volt wire from the trailer connector. And the battery ground wire should be grounded...
    view full answer...
    Image 1 for Image 2 for
  • Can a Trailer Breakaway System be Installed on a Tow Vehicle Instead of a Trailer
    Trailer breakaway systems have to be mounted on the trailer. This is because the power source, the battery, has to be on the trailer. Presumably if the trailer where to break away from the vehicle it would no longer have the power source and the system would not function. I have included a couple of links on breakaway systems for you.
    view full answer...
  • How to Charge Battery in Pro Series Trailer Breakaway System # 50-85-315
    The # 50-85-315 Pro Series Push to Test Breakaway Kit includes an integrated charger that will keep the battery charge maintained using the 12-volt circuit from the 7-way. I've linked you to a video showing how the kit is installed.
    view full answer...
  • Where Does the Cable for the Break Away Switch Attach on the Tow Vehicle
    The cable loop for the breakaway switch in the Trailer Break Away Kit With Built-In Tester and Battery Charger, # 50-85-315, does not attach to the ball. Run the pin through a safety chain loop on the hitch. Pass it through the loop on the other end of the cable, and then plug it in to the break away switch.
    view full answer...
  • When Would a Trailer Break Away Kit Be Required By Law
    Many states in the U.S. and provinces in Canada require break away kit. In order to determine the specifics for where you live and where you plan to travel, you can check with the state and federal departments of transportation for the area. Specific weights or trailer types may change from state to state, so it is important to check for every state in which you plan to be towing. A break away kit is just a good idea in general, whether it is required or not. It is a fairly simple system....
    view full answer...
  • Where Does Breakaway Kit Attach to on Trailer
    The breakaway cable should be longer than the safety chains according to RVIA Recreational Vehicle Industry Association. This will activate the brakes in the event you lose the trailer connection and the safety chains fail which will bring the trailer to a stop.
    view full answer...
  • Mounting Hole Spacing for Pro Series Trailer Breakaway Kit
    Manufacturers do not provide us with spec drawings for their products. However, if it's just the mounting hole spacing you need, they're spaced 5-11/16 inches across and then vertically they're 1 inch. I've linked a video that shows the measurements being taken.
    view full answer...
  • Troubleshooting Trailer Breakaway Switch Where Wiring Causes Light to be Yellow all the Time
    I believe the problem is the connection of the switch on your breakaway. You said you went from blue brake output on the trailer to the blue wire of the switch and then on the other side of the switch you went to a black wire. You should have went to the blue wire of the battery box. The black wire of the battery box goes to the 12 volt power of the 7-way which is typically red. Check out the diagram I attached for more info as well.
    view full answer...
    Image 1 for
  • Troubleshooting Trailer Brakes that Are Activating but Not Stopping Trailer
    Sounds like you installed new brakes and they aren't wanting to grab and stop your trailer. Most likely you just need to adjust the assemblies so that they will actually grab. If they are self-adjusting brakes all you would need to do is make several brake applications with the trailer moving and they will set themselves. To see how to manually adjust trailer brake assemblies check out the video I attached, fast-forward to the 4:35 mark of the video. I also attached a help article on...
    view full answer...
  • Trailer Breakaway Kit Recommendation for Gooseneck Trailer
    I would go with the Pro Series kit part # 50-85-315 as it has the best price, has a built in charger and battery tester, and because of it's many great reviews. I attached an install video for this for you to check out as well.
    view full answer...

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Info for this part was:

Employee Mike L
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Employee Michael H
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Michael H
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Employee Adam R
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Employee Zack K
Video Edited:
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Employee Jeff D
Installed by:
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Employee Cole B
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