bing tracking image

Hopkins Engager Trailer BreakAway Kit Installation

content loading

Customers compare 20400 to these similar products




Products Featured in this Video



How to Install the Hopkins Engager Trailer BreakAway Kit


Today on our trailer, we'll be installing the Hopkins Engager Trailer Breakaway Kit with Charger and Tester, part number 20400. Breakaway switches and kits are installed for emergency breakaways from the towed vehicle. It will pull the pin and gauge the battery, sending power to the trailer breaking, automatically applying the breaks to your trailer. Here, we have the new Engager Breakaway System with charger and battery. We have the pre-installed wires, our ground, power, and break-V. Built into the case, our attachment points on both sides.

Once we have it in place, we can go ahead and use some self-tapping screws to secure it. Now with our box mounted, we'll go ahead and mount the new switch. The black wire will run to the vehicle battery which was the red wire from our pigtail. Added to that, we'll have the black wire from our breakaway switch. Next, we'll go ahead and hook up the ground circuit. That will be the white wire from our breakaway box and the white wire that's pre-attached to our pigtail.

Then, our last connection will be the blue wire from our breakaway box will connect to the blue wire from the breakaway switch and the black wire from our trailer pigtail. We're going to be using the Deka Yellow Heat-Shrink Butt Connector for 12 to 10-Gauge Wiring, part number DW05745-5, and the Deka Blue Heat-Shrink Butt Connector for 16 to 14-Gauge Wiring, part number DW05744-5. We'll need to heat up the shrinkage portion of the butt connector. Using our heat gun, we'll go ahead and do that now. Note, if you don't have a heat gun, you could also use a lighter or a butane torch. Just keep in mind to keep your heat source moving, so that you don't actually melt the wire.

We'll now go in and put the breakaway switch pin into the breakaway switch. Now with everything connected, we'll go ahead and finish securing our wiring. We'll put the remaining portion of the wire back into the wire loom. At the end, install our digression. I'm going to go ahead and use some black electrical tape just to wrap up my wiring. I'll bundle it up and clean up the install look.

Next, we'll go through operation of our new breakaway system. We can press the green test button to check the battery voltage. You can see it indicated it's recharged, so as our trailer is being towed, the hot lead from the 7-pole connector that connects to the vehicle will supply power to our battery charger, recharging the internal battery. That will complete our install of the Hopkins Engager Trailer Breakaway Kit with Charger and Tester, part number 20400. .


Questions and Comments about this Video

Chris H.

you connected the blue wires from the charger and switch to the black wire on the pig tail. My instructions say to connect all the blue wires, pigtail, switch, and charger. My charger melted when I hooked it up your way.

Etrailer Expert
Reply from Rachael H.

We always recommend wiring by function not strictly by color code. There are many different configurations and variations for trailer wiring. The black wire on the battery box should be connected to the 12V power supply, the white is ground and the blue wire is the brake wire. I have included a link to the installation instructions for your reference.

Info for this part was:

Employee Cole B
Installed by:
Cole B

At etrailer.com 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.