Trailer Wiring Junction Box - 7 Terminals - Polypropylene
(143 reviews)
Price: $24.76
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Trailer Wiring Junction Box - 7 Terminals - Polypropylene
Item # 3375601100
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Buyers Products Accessories and Parts - 3375601100
- Trailer Wiring
- Junction Box
- Buyers Products
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.
- Electrical junction box consolidates your truck's wiring
- Polypropylene construction
- Number of terminals: 7
- 1-Year warranty
5601100 Buyers Products Electrical Junction Box - 7 Terminals - Polypropylene
Video of Trailer Wiring Junction Box - 7 Terminals - Polypropylene
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Video Transcript for Buyers Products Trailer Wiring Junction Box Review
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..
Customer Reviews
Trailer Wiring Junction Box - 7 Terminals - Polypropylene - 3375601100
Average Customer Rating: 4.8 out of 5 stars (143 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.by: Jennifer 07/03/2022
My new towing vehicle required a longer cable so I purchased the cable below as well as this junction box to make my life easy. Installing this junction box allowed me to make some corrections based on vehicle side wire colors and trailer wire side colors which differ. I mounted it on the side of the trailer to hold it in place firmly and it works perfectly. This is a great way to have a neat installation that looks like it is completely sealed from weather and insects. Highly recommend this.
Hopkins 7-Way Blade-Style Connector w/ Molded Cable and LEDs - Trailer End - 6' - Auto Standard
by: Gene06/28/2022
This junction box was a great addition to my trailer wiring as it provided a watertight location to make up connections without splicing wire. A suggested enhancement would be stainless mounting screws to eliminate the rust potential.
by: Jeff03/09/2020
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.
by: BrianB06/14/2019
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!!
Comments
One year later and the box is still holding up strong! Great product!
BrianB - 06/17/2020by: Raymond 08/17/2022
All the items I ordered were as shown and described on the etrailer Web site. They came the second day after placing the order. Prices were better than anything local. Great people to work with. I will be using them again.
by: Rambozo05/16/2022
I use these all the trailers here. The polypropylene stands up much better to sun, weather, and bumps than the ABS versions. Makes it real easy to change out the trailer plug when they inevitably get damaged.
by: AD Metal Works08/22/2022
Use on many of our trailers, Great prod uct
by: Steven 07/30/2022
Helped make my trailer project look very professional.
by: William08/10/2022
Great website. Detailed information on products. Easy Ordering and fast shipping.
by: Thomas 01/22/2022
Used when replacing connector and breakaway switch on my enclosed trailer. Was easy to use and install.
by: Jon07/25/2020
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!
Comments
Great! Still water proof and working fine.
Jon H - 07/25/2021by: Paul 09/01/2022
Excellent company to work with. Very knowledgeable and always on time shipments.
by: David 07/19/2022
quality construction
by: Phil 09/05/2022
It's well built a good design
by: Chris 01/23/2022
Very good junction box for the money. I used it to wire in a 7 pin RV and 6 pin round to vehicle.
by: Rick 05/23/2021
well made, attention to details with grommet sizes.
Comments
Working perfectly, highly recommend
Rick - 05/23/2022by: Herald02/01/2022
These make it so much easier to troubleshoot trailer wiring and are a really clean solution.
etailer gets them to you faster than expected.
Great product, great price.
by: Severin05/17/2020
My trailer's stock surge brakes worked pretty well but dragged the brakes driving down hills, did not work while backing down boat ramps, and provided no backup if my vehicle brakes failed... So I got this EOH system to solve those problems.
I only test-drove the finished upgrade once but it seemed to work fine. Note that in my 2018 Ram 1500 with integrated trailer brake control, I needed to set this up as "EOH heavy" even though my boat + trailer are under 6000 lbs.
I wanted a solid, clean install, so I had a bracket made and welded to the trailer out of harm's way and above the possible high water level, even though it's all theoretically waterproof.
Other considerations:
- I was able to re-route the stock steel brake line right to the brake unit.
- I had to buy a new 7 pin trailer harness to replace the stock 5 pin one. I made a conversion harness to go from the new wiring to the stock trailer wiring.
- I locked out the original surge system by replacing its guts (master cylinder, spring, etc) with a steel bar that goes between the front and rear pins.
- I hid the breakaway switch inside the tongue and ran the new breakaway cable where the original one went.
- I safety-wired the brake reservoir cap to prevent its loss or vandalism. It just didn't seem secure to me. Easy fix!
I think it looks good and seems to work well. I expect it will last many years. I gave it only 4 stars as the brakes have some lag (1/2 second?) before I can feel them working. I was led to believe the brakes would be instantaneous and I "would not feel the trailer" (possibly like the electric brakes on my other trailers) but it's not quite that perfect. But maybe I'm being picky! I'd choose this very system again.
by: John05/18/2019
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.
Comments
Still working great!!need one for a new build coming up. Thanks E Trailer.
John G - 05/19/2020by: James06/04/2019
This terminal strip box is well designed. It has seven studs with washers and nuts plus a very clever arrangement for getting cables into the box - two on one end and one on each of the other three sides. Each hole has a blank (closed) or holed opening to accept a cable. Pretty clever. The slots in the box fit these plastic grommets and allows either an opening or a covered slot to be used.
I mounted the box in a horizontal position on the bulkhead near the battery supply for the breakaway switch. I ran the main 7-wire cable to the bottom and spread it along the studs according to the diagram for the color scheme. I ran the cable from the trailer to the right side (where the two cable entries are located) into the upper access hole and distributed each wire to the appropriate stud. This allows any other application to access the power source such as lighting or other accessories. I used only lights, but I had to connect the power for the lights to the blue wire out of the battery box since it is the only wire with 12 vdc on it all of the time.
When the cable is hooked to a vehicle, the 12 vdc connection has 12 vdc, but when it is not connected, the 12 vdc connection is not used and shows only 1.5 vdc. This is the black wire on the battery box. The white wire is ground - between these is the power for the battery charger. The blue wire, however, has 12 vdc on it at all times, so disconnect the battery before hooking it up. And don't connect the blue wire to the blue wire of the cable from the vehicle. The blue wire must be connected to one of the wires on the breakaway switch (I used a red wire to the switch and a black wire back to the box) and the return wire is connected to the blue wire for the brakes. So when the plug is inserted in the breakaway switch, the switch is open and no power applied from the battery to the brake solenoids. When the plug is removed, the switch is actuated and 12 vdc is applied to all of the brake solenoids in parallel. The one side of the switch is hot all of the time unless the battery is disconnected.
by: Mrk03/18/2022
Part arrived and was a day earlier than promised. I will install it this weekend and hope my installation is as good as the product.
by: Terry 11/15/2021
I think the product is exactly what I ordered and exactly what I wanted. The 1 star is for filling up my inbox with junk mail. It made me not want to do business with etrailer.com again.
by: Chuck01/30/2020
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.
Comments
A year later, all is well.
Chuck - 01/31/2021by: Michael09/03/2021
Overall product looks good but would liked to have received mounting screws and wiring clamps that were advertised as part of the whole assembly.
Comments
This hardware is supposed to be included. Customer Service will be reaching out to you soon.
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Sierra K - 09/13/2021by: Brian11/10/2018
I chose this box because it was economical and I didn't need it to be water-tight because I mounted it inside my old camper. My priority was to organize a mess of wiring and to make it simple to switch the type of tow-vehicle connector. I'm very happy with the result. Those little nuts that fit on the terminal posts are 3/8 inch - so get a socket that size to help you screw them on and off (with your fingers not a wrench). And be prepared for those nuts to fall down and roll into hard-to-reach places inside the box. If you have a magnetic retrieval tool you can save some frustration.
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Installed by:
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Installed by:
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Video Edited:
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Edited by:
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Written by:
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