


Image of the Hopkins Trailer Breakaway Kit with Battery, Pin Switch and Cable. So, mounting those parts properly, and connecting them for each trip is critical. Pulling the pin connects the battery to the trailer brakes. In reality, the pin pull switch and the cable (which connects the pin to the tow vehicle) are the critical parts. OK, that’s the quick overview of the parts. Here’s a quick unboxing video to show the parts and give a little more explanation. The switch has a cable that attaches - one end to the tow vehicle, and the other end to the switch - so if the trailer gets too far away from the tow vehicle, it pulls the pin to ‘Flip’ the switch.

There is a pin switch that turns the brakes ‘ON’ if the trailer does disconnect. The trailer gets a battery so it has power to apply the brakes if needed. It works with all Electric brakes and with the Electric over Hydraulic systems. While there are Hydraulic systems that can do this also, this article is for electric brakes. Please Note: This article discusses the electrical breakaway, not other systems. This includes a lot of trailers built from plans we offer. In most cases, this applies to trailers of more than 3000 lbs. While there are arguments both ways, it’s the law for now, and until we have something better, this is what we do. The idea, I guess, is that (hopefully) stopping a trailer is less of a hazard. It applies the trailer brakes if a disconnect does happen. Either way, that’s where the trailer Breakaway Kit comes in. People forget to tighten the hitch, or don’t get it on totally. We’ve seen how terrible this is - and even more terrible - it’s not that uncommon for a trailer to unhook. The concept of the “Breakaway” is to automatically apply brakes if a trailer comes disconnected from the tow vehicle. However, there are some nuances, and for some in DIY, they are a little intimidating. What in the world is a Trailer Breakaway Kit? If you pull a “larger-ish” trailer, you should definitely know, because it’s a legal requirement in many jurisdictions.
