Trailer Wiring Junction Box - 7 Terminals - Polypropylene

I have used these before and they are great for a trailer wiring project. However, you must be careful when mounting to ensure that you do not crack the housing. If the mounting surface is not perfectly flat and/or the mounting tabs flex it will crack. i mounted two on my trailer and one cracked the other did not. A little silicone will seal it up! 692400

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. 581695

I like what I got 570227

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. 643411

Used this box under my truck to connect both the bumper rv plug, and the fifth wheel rv bed plugs to the truck wiring. Made the job easy!! 678314

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. 652889

A good way to consolidate and terminate trailer wiring. I mounted it on the front of the trailer in an easy to reach place. Built in cable clamps are a nice feature. 593748

Great product. Great price. Fast shippi ng. 634656

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!! 658136

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all of the items I ordered are Just what I needed for a complete rewire of my flatbed trailer. and I was blown away by how fast it arrived. it's too bad more of America's businesses aren't operated like etrailer! 663177

Excellent product, well built ,had a friend use my trailer and dragged the trailer plug down the road for the second time ,so decided to install the junction box to make the repair easier 592645

Everything was as expected and delivered on time. Thank you. 721052

Good quality with easy installation options . 717368

installed on a car trailer to make plug hook up cleaner. good product worked like i wanted 652653

quick service. 646381

We were very impressed with etrailer. Our order was well packed, in great condition upon being received. All parts were there and in good condition. We will be using etrailer a lot more for our farm needs. Now, to just get it all put together, lol 643392

Just What We Needed perfect thank you very much 634239

every thing looks good will install soo n 633084

Exactly as described!!! 614511

Just as advertised 591490