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Durable polypropylene box creates a fast, easy way to connect the wires from the trailer connector to the wiring for either a 6-way or 7-way connector. Makes replacing your trailer's connector simple.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Shane: Hi, I'm Shane with etrailer.com. Today, we're going to be going over the junction box for trailer wiring. This box is going to be a polypropylene box, very durable plastic. It's made to be mounted on the frame of your trailer. And what this does, this allows you to wire your 7-pole plug separate from your trailer wiring. So, say we have our 7-pole wiring, it comes loose, drags the ground, or gets damaged.
We're not going to have to cut it off of our wiring coming from our trailer in order to replace the plug. We can simply take it off of the pegs here, replace our plug, and add new ring terminals, stick it right back in the box and connect it directly to our wiring.And with a trailer this size, or larger trailers, if you maybe want to add a breakaway switch, it's very easy to run that wire over and connect it directly on to the brake wire coming off the 7-pole plug, without having to cut the wire coming out of there and splice them together. Depending on how your trailer is set up and how your 7-pole plug wiring is done, it's going to have to be tested. Your box is going to come with a sheet inside, it's going to look like this, on how it has to be set up.However, this is not always accurate with the plug itself. If you have the 7-pole plug, it may be wired just a little bit different than this.
Trailer wiring needs to match whatever the functions are coming off of your 7-pole plug coming from the vehicle. You're going to have a power wire coming in. You're also going to have ground. The ground coming off the center post needs to be grounded to the frame. So you're not only grounding the 7-pole plug, but you're also grounding this setup here on the box.The box is going to come with five rubber knockouts.
You can either cut these or they will also come with another set that already has a hole already open. I, myself, just like to cut an X in it and run my wires through it, it kind of helps it seal a little bit better. These will seal underneath the lid. Each place that your wire comes in, you're also going to have a metal clamp with two screws, and that's to hold your wiring in place to keep it from coming out. The lid you can see here, it's got a groove, and what that does is it seals around this edge to keep any water or anything like that out.It's going to come with two large screws to hold your lid in place.
Again, I'm Shane with etrailer.com. That's going to do it for our look at the trailer wiring junction box..
Average Customer Rating: 4.7 out of 5 stars (219 Customer Reviews)
Durable polypropylene box creates a fast, easy way to connect the wires from the trailer connector to the wiring for either a 6-way or 7-way connector. Makes replacing your trailer's connector simple.The junction box provides adequate room for wiring terminations and weatherproof covering of them. The harness for transmitting power to the trailer is of robust design with LED lights indicating proper power to the various end uses. A stainless steel u-bolt was used to secure the harness to the trailer frame and thereby eliminate stress on the junction box. Stainless steel machine screws were used to attach the Breakaway Battery Box to the trailer frame. A stainless steel quick connect will be used to secure the Breakaway switch to the vehicle. The red lead supplies 12 volt power to the Breakaway battery.
All new wiring on a trailer rebuild. These junction boxes make the job so much easier and faster. Now when i troubleshoot wiring issues im chasing one wire at a time. Oh and now the wiring goes in a location that works for me
I sold the trailer,but could not return electrical. No hard feelings.
Nice junction box. Used this as a junction/access point for my ‘18 Equinox flat tow setup. It houses my 5way conductors for tail lights, the Roadmaster battery charge line circuit breaker and fuse lead to my accessory +12v port that I’ll plug my Brake system into. Also added a cut off toggle switch on the charge line when not in use.
An inexpensive but very nice unit. Quality of fasteners could be better and should have come with 2 nuts per post instead of one. Do not like the lag bolts for fastening the cover. And what should have been a sticker for identification of posts was not a sticker. Other than that, the box works.
have been satisfied with everything that we order from e-trailer
This is the mechanism to rewire an elderly auto hauler, that has wiring faults.
Better to spend the $$ and do the job correctly, than faulty shortcuts. The old Junction mechanism is not viable. This should fit the bill.
Will comment further after the dasterdly deed has been done
The junction box is identical to the one I managed to destroy while hooking up my trailer. It was just a matter of pulling the old box out and screw in the new one
solved the nasty wire mess problems,, you have bolts to tie each ring terminal to...
works great for my trailer.
Doing business with Trailer is good.
Correct product at a fair price.
1 1/2 days from phone call tilll delivered. What else could you ask for, that was fast!!!
Awesome piece of equipment!! EXACTLY what I was needing!! Replaced the old torn up box and this box worked perfect!! Fast shipping and great communication, as usual!! Thank you etrailer!!
Brianb
6/17/2020
One year later and the box is still holding up strong! Great product!
This is an excellent junction box.
It worked out well. Better than trying to just splice on a new plug & cable.
Great products delivered on time. Professionally packaged, not seen often.
Works well, like the connections out of the weather
Trailer sits outside 24/7, always bone dry inside. I put a little silicone around the rubber grommets for good measure.
Beside using these boxes on trailer tongues, they're also handy at the rear of trucks. Heavy duty trucks also use seven wires. Different plug, round pins. I've used similar boxes to tidy up the wiring on many big vehicles. These seem to be decent quality at a fair price. I got this one to add a trailer connection on a school bus converted to a camper. It was shipped promptly, UPS sat on it for a few days.
Chuck
1/31/2021
A year later, all is well.
The terminal box is handy little item to have when wiring a new 7 way plug on your trailer.
I have not installed yet, but the product arrived in good condition. There are lots of options for installation and lots of grommets for the wiring to access the terminals.
Fast shipping and seems to be good qual ity
All my trailer parts for a new build keep coming in from etrailer , my go to online store. Everything needed for building and maintaining trailer etrailer has. I have been dealing with etrailer for several years now and have never been disappointed.
Just what I was looking for, needed to rewire my Army truck tail lights and this box fits a treat. and is the size that I can hide from the rivet counters. Thanks again and other items I have had from you in the past.
John B.
5/19/2020
Still working great!!need one for a new build coming up. Thanks E Trailer.
Perfect! Works like a champ, for years I've used plastic conduit and electrical tape, it never holds up and looks bad. This junction box made my trailer rebuilt project look professional!
Jon
7/25/2021
Great! Still water proof and working fine.
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Sandie
3/17/2024
Working like a champ. Completely satisfied.