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Hopkins Replacement Break-Away Switch, 7" Lead Wires

Hopkins Replacement Break-Away Switch, 7" Lead Wires

Item # HM20010
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HM20010 - Switch Hopkins Trailer Breakaway Kit
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Hopkins Accessories and Parts - HM20010

  • Trailer Breakaway Kit
  • Switch
  • Hopkins


Replacement Switch for Break Away Kits

  • 7" lead wires
  • Pin and cable included

NOTE: For replacement pin and cable, use HM20051.



20010 Hopkins Replacement Break-Away Switch, 7" Lead Wires




California residents: click here


Video of Hopkins Replacement Break-Away Switch, 7" Lead Wires

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




Video Transcript for Hopkins Replacement Break-Away Switch Review

Hi there safety conscious haulers. Today we're going to be taking a look at Hopkins replacement breakaway switch. Your breakaway switch will apply the brakes in your trailer in the event of a catastrophic disconnect. It does this using a tethered cable that connects to the switch itself, and the other end would attach to your vehicle. In the event the trailer separates from the vehicle, the cord would be pulled, pulling the pin, applying the brakes on your trailer, helping it come to a safe stop.It's good practice to test your switch at least once every year, or before you go on a long trip, and an easy way to do that is to just pull the pin and then go back to your brakes and listen for a hum. If you hear a slight humming, then your brakes are probably being applied.

The best way to check it though would be to jack up the wheels, spin them, pull your pin, and then verify that the brakes do apply and stop the brakes. You can also do this to help determine if you have any issues with your brakes while you're doing it. If you just listen for the hum, you're really just verifying that at least one of the brakes back there is working, but you want to make sure that each wheel on each axle is also working.Coming off of your breakaway switch, you'll have two wires, a blue and a black, one of these wires needs to be hooked to a power source, and the other one would hook to your trailer brake circuit. This way, when the pin is pulled, the pin is actually currently keeping the two circuits separate from one another, but when you pull the pin, the contacts inside close, bringing the power source directly to the brake circuit to apply the brakes. The wires coming off the back, each measure about seven inches in length.We're going to be mounting our breakaway switch up.

The length of wires are pretty short, so you may need to extend those depending on where you choose to mount it. We're going to be mounting ours on top of the frame right next to our battery box here, so that way our wires can poke inside of our battery box and we can make all our connections inside. We're going to be attaching it just using a self tapping screw right into the top of the frame. Now a screw doesn't come included with your breakaway switch, but you can pick up self tappers here at etrailer.com.Sometimes it's a little easier to make the mounting portion of it, if you just pull the pin out of it, that way you don't have the wires hanging there. And again, we're going to put it there due to the wire lengths so it'll fit in our box.

Now we're just going to take ourselves tapping screw and run it down the single hole here in the back. When tightening down your breakaway switch, you want to make sure it does still have some movement, as it does need to swivel for proper operation.We're just snugging it down and then just verifying that it can move. We just don't want it to be so tight that it's very stiff. That's pretty good there, it can move with enough ease, because if your breakaway switches cocked at an angle, or it's not right, when you have a catastrophic disconnect, it can pull crooked on your pin, which could just break the end of your pin, so we want it to be able to move the breakaway switch to where it's in a position where it can pull it straight.Now that we've got our breakaway switch mounted, you can go ahead and plug the pin back in. We're going to route our wires into our battery box here, and you may not have a battery box exactly like this, but the main goal is that these two wires need to go to a power source, and then the other wire's going to connect to your brake circuit.

The charger here is in-line, and this is going to be the output from the charger for our power, so we're going to connect to that one to the blue wire. We can go ahead and strip both of these back, and just crimp them together again using our heat shrink butt connectors.Then the other wire here coming off of our breakaway switch is going to be the output going to our brakes on the trailer, which we know is this wire here. Even though these are blue and black wires on the breakaway switch, it doesn't really matter which wire you connect to which one. We could have hooked the black one to power and then the blue to the output, it really doesn't matter in the switch, it's just completing a circuit. We're going to strip both of these back. The main intention is that you have one of the wires hooked to power and the other one hooked to the break output. We're just going to butt connector those two together, and then we'll hook these two together. Now that we've made all of our connections here, we can use a heat gun to shrink down all of our butt connectors.We're now back here at the wheel and you can see that I can spin it. I've got it jacked up, and now I'm going to go up to the front, I'm going to pull the breakaway pin, and we want to verify that our wheels no longer spinning, that our brakes did apply. Gone ahead and pulled the pin, now it's here in my hand, and yep, they are locked up so we are good to go, everything's working properly.Another way that we can test out our breakaway switch to ensure that it's working properly, is we can check the output from our breakaway switch to the brake signal circuit, which is located right here, and it's typically the blue wire coming off of your seven way connector. I'm going to touch the battery first on the positive, just so you can see that our test light light lights up when we touch the battery. This is our brake signal circuit down here going to the trailer brakes, and I'm going to go ahead and pull the pin now, and you can see that it lights the light when I pull the pin. I'll just stick it back in.That completes our look at Hopkins replacement breakaway switch.


Customer Reviews

Hopkins Replacement Break-Away Switch, 7" Lead Wires - HM20010

Average Customer Rating:  4.8 out of 5 stars   (116 Customer Reviews)


- HM20010
by:

Arrived in good time and installation was easy enough. The 7" lead wire for the brake was too short and I had to add wire to make it reach.



- HM20010
by:

I accidentally let my Breakaway unit go with a Jeep I sold. Therefore I needed a new one for my new Jeep which I tow behind my motorhome. Brake Buddy wanted close to $80 for a replacement Breakaway unit and this one cost me less than $10 and a little bit of wiring. Works great.


Comments
Great
Sally C - 08/29/2019



- HM20010
by:

Great quality, much better price than I could get for an original switch and will serve the same purpose. This switch is to replace the one that was missing from a Brake Buddy that I bought used. Fast shipping and would recommend this product.


Comments
Still working as good as original equipment. Great quality, would buy again
Robert - 09/09/2018



- HM20010
by:

This product works excellent and is many times less expensive than the one you can purchase from the supplemental brake system manufacturers. The service was excellent and I look forward to checking out other etrailer products.



- HM20010
by:

excellent replacement breakaway switch for my snowmobile trailer. accidentally pulled the original one out with the lawnmower, this on replaced it exactly. Thank you!



- HM20010
by:

Great addition to my military surplus trailer. Substituted the Hydrastar for the old surge brakes, and works like a champ!



- HM20010
by:

Nice price for this needed item. I do wish that Hopkins would make them with a ring on the end. I always cut the cables and put a ring in them for use with the coiled breakaway cable I have. This is about the 4th vehicle I have installed one of these, always having to cut the cable. Cable is Item # FA80-01-2140 at eTrailer, by the way.



- HM20010
by:

Wet similar to the failed switch on my KZ sportsman. Wires were not the same color, wiring diagram is for Hopkins system. It comes with. I instructions but easily found on line. Just wanted to confirm the blue wire was the same as original orange wire on my old switch.



- HM20010
by:

Seems to be reasonably well-made and is easy to install. When adding brakes to a trailer the constant recommendation is to use 10-gauge wire. Odd, then, to see smaller gauge wire on the brakes themselves and on this switch. Since it, at worst, only has to work once, I suppose it isn't a big deal, and it does make splicing those short little wires easier.


Comments
Seems to be fine - havent tested it but no obvious corrosion.
Mike R - 09/16/2015



- HM20010
by:

The order arrived in good time and turned out to be very good quality, exactly like the web pic, at a great price Very pleased with etrailer.



- HM20010
by:

Didn't want to spend $70 for one of these for my brake buddy. Crimped these onto the correct ends and it works perfectly.



- HM20010
by:

Great product. Great price. Great speedy delivery! Thank you!



- HM20010
by:

I discovered etrailer.com scrolling for parts for trailers and am very pleased with the very prompt reply that my order is being filled and shipped in a day or two and it was, I received the order sooner than I expected and it is exactly just right to replace my broke Break-Away Switch, I have not installed the new Switch yet since the trailer is not in use at this time. THANK YOU etrailer.com



- HM20010
by:

Does the job with a couple of modifications to be able to use the original Brake Buddy setup.



- HM20010
by:

PERFECT replacement for original equipment. Simple install and performs just great!



- HM20010
by:

Cable was a little long but I had a retractable coiled safety tether so I just saved it for another side project



- HM20010
by:

As advertised. Always good prices and fast shipping with etrailer.com!



- HM20010
by:

Installed OK - haven't had breakaway occur so cant say that it does or doesn't work when the going gets tough. Worked OK Manually.



- HM20010
by:

Emergency break-away brake switch..... Lets hope we never have to use it! Remember to make sure it works before every trip... A little silicone keeps it working smooth and reliable.



- HM20010
by:

As good as the original that was on the trailer



- HM20010
by:

I received the item exactly as described. The order was processed in a timely manner and placed into the USPS system. I received it with no damage. Thank you.



- HM20010
by:

Works great. Has a nice O-ring seal on it to keep the water out of it.



- HM20010
by:

Great replacement for my ALKO axle!



- HM20010
by:

Seems to be a good quality replacement for my old beat up original.



- HM20010
by:

Price is very good compared to Brake Buddy replacement. Delivery was good, as well. I have not installed or used product, yet.


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Show More Reviews

Ask the Experts about this Hopkins Accessories and Parts

  • How to Install an Aftermarket Breakaway Switch on the Demco Stay-IN-Play
    The Hopkins Replacement Break-Away Switch part # HM20010 has a normally open circuit which means there will not be any current that passes through the breakaway switch while the pin is intact. Once the pin is pulled the circuit then becomes closed and power is able to pass through the switch and send power to the trailer brakes. It does not matter if you hook the blue wire on the switch to the blue wire on the Stay-IN-Play or the black wire on the switch to the blue wire on the Stay-IN-Play....
    view full answer...
  • Does a Vehicle Being Flat Towed Need a Breakaway System
    When flat towing a vehicle the supplemental braking system being used will have a specific breakaway switch that goes with it. Supplemental braking is required by law in most states so if you are not using one you will want to look into getting one. The breakaway switches will not work with vehicle brakes directly because they are hydraulic and the switches work with electric systems. If you have a braking system, let me know which one it is and I can explain how a breakaway system gets...
    view full answer...
  • Will a Hopkins Breakaway Switch Work with a BrakeBuddy Braking System
    A breakaway switch is a very basic device so you can use switch # HM20010 with your braking system. But I recently learned that the BrakeBuddy switches use banana clips to connect to the BrakeBuddy itself. To use this switch you would need to obtain those clips from an electrical supply store. Likewise, the coiled cable, # RM-8603, can be used on any system that has a loop in the breakaway cable that it can attach to so it will work with # HM20010.
    view full answer...
  • Replacing Break Away Switch Used with Brake Buddy Classic Flat Towing Braking System
    According to my contact at Hopkins Manufacturing, the # HM20010 break away switch you referenced would be a good choice to replace your damaged breakaway switch. Make sure that your connections to the existing wiring are protected from the elements using heat shrink tubing or electrical tape.
    view full answer...
  • How to Replace Pin for Trailer Breakaway System Without Knowing Model of Switch
    Unfortunately, we don't have a way to tell which breakaway system you have. However, the only part that the pin is specific to is the switch. So instead of getting a new pin you can get the replacement switch # HM20010 which isn't much more in cost.
    view full answer...
  • Could an AC Power Surge Cause Trailer Breakaway Switch to Melt
    The DC wiring system and the AC wiring system in a trailer does have protective features between the two; mostly handled by the transfer switch and fuse/breaker panels. But I suppose that it is possible that a power surge could have worked its way through somehow. But I think a more likely scenario is that some how the pin got pulled out some causing the contacts inside to touch which completes the circuit from the breakaway battery to the trailer brakes. The battery will keep apply...
    view full answer...
  • Troubleshooting Smoking Brake Controller and Melting Wires
    A trailer brake controller should never smoke up like how you described. The first thing you will want to do is determine what caused this so it doesn't happen again when towing a trailer. The most likely culprit is an internal short on the brake controller itself, which would just require a full replacement. You will also want to make sure that the wiring connections are all correct. The red wire from a brake controller should go to the cold side of the brake light switch in the vehicle....
    view full answer...
  • Solution for a Lost Trailer Breakaway Cable
    Since the breakaway cable you would need would be specific to the breakaway system you have installed on your trailer I have a better solution for you that I can guarantee will work. You will want to replace the entire breakaway switch as they all wire in the same. For that you would want the Hopkins Breakaway Switch part # HM20010. To see a diagram of how breakaway systems install and wire to a trailer see the attached picture and FAQ.
    view full answer...
  • Why Would Trailer Breakaway Battery Only Charge When Pin Is Pulled
    Sounds like you might have some of the wires of your breakaway kit reversed. If you check out the picture I attached you'll see how the kit is supposed to be wired. Most likely your issue is between the connections to the blue and red wires of the trailer in the diagram.
    view full answer...
    Image 1 for
  • Replacement Breakaway Switch or Pin For Trailer
    The plunger can be put back in place without any other functions needed to reassemble. In fact, that is exactly how you test the system for function. If the pin is not able to be put back in place so that the brakes don't lock up, then you can simply disconnect the breakaway battery. As long as there is no power going through the system the brakes will only be active when there is power from the trailer brake controller. If the way the system was wired, makes the system lock the...
    view full answer...
  • Replacement Cable And Pin For Hopkins Engager Break-Away System
    I spoke with my contact at Hopkins about your Engager Break-Away system. They told me that there was a change to the pin about 3 or 4 years ago and the pin on the newer systems is actually shorter than the previous switches. If your break-away system is one of the newer models then part # HM20051 would work well for you. This is the 48 inch cable with the pin that attached to the break-away switch. If you have an older model with the longer pin, then part # HM20010 would be...
    view full answer...
  • What to do When Breakaway Pin is Stuck in Breakaway Switch
    If you cannot get the pin for your breakaway system out of the switch then your best bet would be to just replace the whole unit. The Hopkins # HM20010 will accomplish this and provides you with a cost-effective repair.
    view full answer...
    Image 1 for
  • How to Find Breakaway Battery on Fifth Wheel Camper
    I really wish we had a diagram or a way to pull up where it'd be. Most likely under the overhang near the landing gear jacks as that's the most popular place. Check there first and then trace the wiring from the breakaway switch to see where they go as they will lead to the battery.
    view full answer...
    Image 1 for
  • Replacement Breakaway Pin & Cable for Hopkins Break-Away Switch HM20010
    If you are referring to the pin for a breakaway kit like # HM20010 that you referenced we do sell a pin and cable on its own as part # HM20051. This replacement pin/cable works with many Hopkins breakaway kits, all of which are listed on the page for part # HM20051.
    view full answer...
  • Does It Hurt a Trailer To Have the Breakaway Pin Pulled While Sitting
    If the breakaway pin was pulled and the brakes were active for multiple days on the trailer while sitting then there are a few things that could have been damaged, the magnets and or brake controller assuming the vehicle was attached during this time as well. I recommend you insert the pin back into the switch to make sure the brakes release and then do a few tests using the brake controller. If all works well then you are good to go. If the brakes don't release or do not re-engage then...
    view full answer...
  • Why Would Breakaway Plug of Trailer Cause Trailer Battery to Drain
    If your breakaway system uses the same batteries as the rest of your trailer it wil drain the batteries when the pin is pulled since that will activate the trailer brakes at full voltage. To prevent the drain for the time being you'll want to cut the breakaway switch off of your trailer wiring and tape up the wiring on both sides. This will prevent your batteries from being able to drain from activating the brakes. I attached a diagram that shows how the switch and system normally wires...
    view full answer...
    Image 1 for
  • Can Breakaway System of Trailer be Used as Parking Brake
    If you pull the breakaway pin on your trailer it will lock the brakes up until the battery is drained. Breakaway kits shouldn't be used as parking brakes. You'd need a chock like the part # MT70073.
    view full answer...
  • Solution for Missing Trailer Breakaway Switch Plunger
    I wasn't able to track down any information on the particular Bargman breakaway switch that you have so your best option is going to be to simply replace the switch assembly. Cables and pins/plungers are pretty specific to the models they are deigned to fit but the switches are typically universal across the board. This means you can simply replace your switch with the Tekonsha # 420000, which will include the cable, switch, and plunger/pin.
    view full answer...
    Image 1 for
  • Once a Trailer Breakaway Switch Pin has Been Pulled is the System Reusable
    Yes. The way that a breakaway switch such as # HM20010 works is that the pin inside holds two pieces of metal apart. Once pulled out it allows the 2 pieces of metal to touch completing the circuit between the breakaway battery and the trailer brakes. All you would have to do to reset the system is put the pin back into the switch. I have included a couple of helpful links on breakaway systems for you.
    view full answer...
  • Troubleshoot/Repair Damaged Trailer Break Away Braking System
    It looks like the interior of the switch was damaged. It's not a big deal assuming it's an electric breakaway system. You can just replace the switch assembly very affordably. The switches use two wires to connect, so they're not system specific. I like the switches offered by Fastway that use a coiled cable that won't drag and feature a carabiner that makes it simple to attach to the tow vehicle. The switches are available with a 4 foot cable as part # FA80-00-2040 or a 6 foot cable as...
    view full answer...
  • Should Dead Trailer Breakaway Battery Cause Trailer Brakes to Not Work
    You do want to charge the battery of the breakaway kit so that in the event you need it the brakes would activate like they need to. That being said that shouldn't affect trailer brakes performance as long as it was install properly. Your best option would be to go over the wiring of the breakaway kit to see if it somehow is interrupting the brake controller output circuit for the trailer. I attached a chart that shows a diagram of how the kits are supposed to install as well.
    view full answer...
    Image 1 for
  • Troubleshooting Melted Trailer Breakaway Wiring
    Melted wires is typically due to a short. It's hard to say exactly what caused your short but you will need to check wiring of your breakaway setup, specifically where the wires connect to the battery, to see if you can find a short and fix as needed. If I had to guess it sounds like the wire that attaches between the switch and the battery has a short to the frame of your trailer and that is what melted it.
    view full answer...
  • Breakaway System Has Power with Pin in Switch but No Power when Pin is Pulled
    Where are you seeing the voltage at? A breakaway system battery would be connected to the switch on the trailer side and the brake output circuit from the brake controller would be on the vehicle side. It could be seeing voltage from the breakaway battery or from the brake controller or even a charge if equipped. It depends on how everything is wired up. When the pin is pulled out it will complete the circuit and allow power to go from the breakaway battery to the trailer brakes. If...
    view full answer...
  • Should Breakaway Kit be Used as Wheel Chock for When Trailer is Stored
    Since the breakaway kit will only activate the brakes of your trailer till the breakaway battery eventually dies (which will not take a long amount of time), I'd say the advice you recieved was not solid. Especially if you are using the breakaway kit as a wheel chock type setup to keep the trailer from moving. You'd be better off using a wheel chock like the part # AM3620.
    view full answer...
  • Easy Solution for Lost Trailer Breakaway Pin and Cable
    Sounds like you are looking for a breakaway switch pin. You can send me a picture of what you have but most likely the easiest solution is going to be to replace the switch with a new one like part # HM20010. Since the new switch will wire in just like you old one it would be able to replace what you have and would save you from trying to track down the exact tether or pin that you would need.
    view full answer...
  • Coiled Break-Away Switch Cable for Hopkins Brake Buddy Supplemental Braking System
    You can get it from etrailer.com! We've got exactly what you're looking for, part # RM-8603. The coiled cable will work great with the break-away switch used by your Hopkins Brake Buddy.
    view full answer...
  • Breakaway Switch Recommendation to Replace a Bargman Breakaway on a 1976 Nomad Trailer
    The Bargman breakaway switch that you have is still sold to this day. Basically, you can use any breakaway switch that you would like. They are a very simple device. Once the pin is pulled it completes the circuit from the breakaway battery and the trailer brakes which applies the trailer brakes. What I recommend is a system that comes with a charger. Take a look at the Engager Trailer BreakAway Kit, # 20099. This is our most popular kit. It comes with the switch, a battery, a box, charger,...
    view full answer...
  • Troubleshooting Trailer that Has Locked Up Brakes After Disconnected from Trailer
    I attached a help article that details how to test a breakaway system, but basically it sounds like your breakaway switch has gone bad or the pin of it has partially unplugged itself so your system is locking up the brakes. If you cut the wire leading to or from the breakaway switch itself the brakes should release. For a replacement switch that would fit nearly all systems you would want the # 2005-P. To pick out the correct brake assemblies for your trailer you need to know a few...
    view full answer...
    Image 1 for
  • Can I Wire a Toggle Switch on My Breakaway System
    There would be no way to install a toggle switch on a breakaway system to activate the circuit at your leisure. The circuit is normally open until the breakaway pin is pulled and then it becomes normally closed which causes power to be sent to the brakes. This all happens inside the breakaway switch and I cannot recommend you modify this for your application. I guess you could then pull the breakaway pin each and every time you tilt the bed of your trailer but this would wear out the pins...
    view full answer...
  • Break Away Switch Replacement Recommendation for Brake Buddy
    According to my contact at Hopkins Manufacturing, the # HM20010 break away switch you referenced would be a good choice to replace your damaged breakaway switch. A breakaway switch basically only completes the circuit between two wires so I am not sure why your setup would have three wires.
    view full answer...

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