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This kit includes a junction box so you can quickly and easily connect the wires from the included trailer connector to your trailer's wiring.
Features:
Specs:
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
Very nice junction box. I like all the options included for trailer wiring installation.
Junction Box is flimsy, difficult or impossible to seal and the studs inside rust.
Over-all it seems good. I was missing one nut on one electrical connector and the plastic seems a bit cheap. I will wait to see if it holds up over time.
Product is great easy installation. Would recommend to anyone.
Direct replacement good quality
Nice quality and fast shipping, if you have any questions about a product the friendly staff are very knowledgeable and helpful
The etrailer web site is so easy to navigate and ordering is super easy. The delivery is really fast.
Good assembly
A quality made item. The description was not clear to me. I misunderstood the RV Connector therfore I couldn't use the item
Still waiting for this backorder.
I will be returning it because it’s too short to hook to a pick up truck
This 7-way upgrade kit with junction box came a mere 2 days after I ordered it, which is great. The entire connector set came nicely assembled and it has everything I need to easily connect it in place of my damaged 7-way cord & connector. This upgrade will assure easy replacement should I squish my cord with my tailgate again. All I will need to do is solder the provided connectors to my existing wire set and get 2 bolts to bolt the box to the 5th wheel hitch. This kit is very robust and is even better than I expected.
This item was shipped in the same box as a 12K jack. The junction box was destroyed. After calling etrailer, they promptly shipped out a new junction box so I could finish wiring my trailer.
The product is great and service on your end is great. The problem I have is shipping. I ordered on Thursday afternoon and shipped immediately. It did not arrive until Wednesday afternoon next week. Also the tracking is lacking. If you could use UPS instead of USPS might help.
Thanks
I went with etrailer over taking a risk with a similar Amazon product because I felt I could trust etailer's products better. I wasn't disappointed. Great quality and all the parts you need to do the job.
My wire colors did not match. Old plug did. The correct light function I had to use trail and error.
Excellent fit and function. 2024 Brinkley z2900.
Ordering was easy and delivery was on time. The cable came with the terminals wired in, saving me some time during installation. Very good quality cable and components.
the junction box and cord are great unfortunately i had to retune it it would not work for my trailer i needed to replace the whole power cabel
Rang out the harness to verify the pin out. And, that made wiring up the harness to the trailer easy.
Great product, very well made and designed. It makes for a much cleaner configuration especially when you have multiple electrical components. I no longer have a bunch of wire crammed into my battery box.
1. Web site description tells you the function of the Black, Yellow, Red, Green, Brown and Blue wires. My wiring harness came with White, Black, Yellow, Pink, Cyan, Brown and Blue wires. Is white ground? Is Pink supposed to be Red? Is Cyan supposed to be Green? Someone with little or no wiring experience can find this intimidating.
2. Mounting hardware would have been nice.
This seems well constructed. It solved my problem of having a torn wire harness on my trailer. While the color scheme didn't align with the wiring on my current trailer, I simply used an ohm meter to identify the wire color for each terminal on the existing plug and did the same for the new plug, then matched the wires in the box accordingly. I loved having a simple terminal strip in an enclosed box for fixing my problem. It is a little unfortunate that there isn't a weather-resistant gasket or seal between the box and the lid, but I was able to mount it in such a manner that I don't think water can get into the box. I recommend this and would buy it again if I need one for another trailer. I will be buying a similar product to upgrade a wire junction box on our RV.
Makes adding interior lights and brakes very easy. You can quickly identify and diagnose wiring circuits and issues.
The eTrailer 7-way junction box was a correct fit for the upgrade of my 4500-lb, dual-axle trailer with EOH control of the new disc brake system. The junction box was mounted on the trailer winch brace, allowing close proximity to the EOH controller and the breakaway kit. The box has multiple wiring ports, rubber grommets, and a heavy-duty, 7-pin wiring harness to reach the tow vehicle. The terminals within the box allows for proper connections of lighting, DC systems, EOH brake wire using crimped eyes mounting on solid terminal screws. Very clean, watertight, and easy to troubleshoot for any bad connections.
Do you have a question about this Trailer Wiring?
Info for this part was:
At etrailer 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.
Mike L.
4/23/2026
If you were to use the # HM20041 cable and a # PK52249 junction box, you'd have a bit more than 8 feet of reach. If that still isn't long enough, you can use the # A10-7W10 which is 10 feet in length.