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Trailer Wiring Junction Box - 7 Terminals - Polypropylene

Trailer Wiring Junction Box - 7 Terminals - Polypropylene

Item # 3375601100

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Trailer Wiring Junction Box - 7 Terminals - Polypropylene Junction Box 3375601100
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  • 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. Call 800-298-8924 to order Buyers Products accessories and parts part number 3375601100 or order online at etrailer.com. Free expert support on all Buyers Products products. Guaranteed Lowest Price and Fastest Shipping for Trailer Wiring Junction Box - 7 Terminals - Polypropylene. Accessories and Parts reviews from real customers.


  • All Info
  • Reviews (15)
  • Q & A (5)
  • Videos (1)
  • Photos
  • Why etrailer?

Buyers Products Accessories and Parts - 3375601100

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 Wiring 3375601100 Review

Speaker 1: Today we're taking look at a trailer wiring junction box. This is a durable polypropylene box that creates a fast, easy way to connect the wires from the trailer connector to the trailer wiring for either a six-way or a seven-way connector. It also makes replacing your trailer's connector simple, if and when needed.The electrical junction box consolidates all the wiring connections on your trailer. It mounts to a secure area on the trailer frame. Number of terminals that this one has is seven. Comes with a flat washer and nut for each post.Basically the way that you would connect your wires to the post is you would take the wire from the trailer plug, strip it back a little bit, put a ring terminal on it.

And then take the corresponding wire on the trailer, put a ring terminal on it and connect to the same post. And you'd do that for each function.It comes with the hardware kit. So in this bag is the hardware to secure the lid to the box. Also there is strain relief brackets and screws. And it has the rubber plugs.

So you have one, two, three, four, five different access areas for your wiring to feed into. Now some people, what they like to do is remove the plug completely and just have the area for the wiring to be able to pass through into the box. What I recommend doing to keep the elements out - dirt, grime, and moisture - is just to cut an area in the plug itself for the wiring to pass through.And then it has your strain relief brackets and the actual mounting areas for the strain relief brackets. What that does is that puts tension on the wiring that's passing through and reduces any type of stress or strain placed on the actual wiring. So it's nice that those are already included.We'll go over the measurements real quick.

So taking a look at the overall measurements, going edge to edge, mounting area to mounting area. This direction measures about 8 and 1/2 inches. Side to side, going this direction, is about 3 and 5/8 inches. The overall height is about 2 and 1/2 inches. The mount holes on the unit, these mounting tabs right here, these are separated on center by seven and 13/16 inches.That's going to do it for today's 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   (15 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.

- 3375601100
by:

Great product. Great price. Fast shippi ng. 634656



- 3375601100
by:

I like what I got 570227



- 3375601100
by:

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



- 3375601100
by:

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



- 3375601100
by:

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



- 3375601100
by:

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



- 3375601100
by:

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



- 3375601100
by:

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



- 3375601100
by:

quick service. 646381



- 3375601100
by:

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



- 3375601100
by:

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



- 3375601100
by:

Just What We Needed perfect thank you very much 634239



- 3375601100
by:

every thing looks good will install soo n 633084



- 3375601100
by:

Exactly as described!!! 614511



- 3375601100
by:

Just as advertised 591490


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Ask the Experts about this Buyers Products Accessories and Parts
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  • Battery Disconnect Switch for Use on Travel Trailer
  • You can use the Marine Battery Switch # 277-000403 for your application but since this item is not rated for outdoor use I recommend using a junction box like # 3375601100 to provide a degree of protection from moisture. The switch housing (not including the knob) is about 1-1/4-inches deep so you'd want to use hardware that is about 2-inches long. If space is available in your battery box you might be able to mount the switch there. In this case a better choice might be the Epicord...
    view full answer...

  • Ways to Install New 4-Pole Trailer Connector
  • Four flat trailer wiring, also called 4-pole wiring, uses four wires and pins configured as shown in the linked photo of a trailer side 4-pole connector. The one pin that is different from the other three (on both trailer and vehicle side connectors) will be the ground pin and this usually has a WHITE wire that will ground to a clean bare metal spot the trailer frame with a ring terminal. The next pin is for the running light circuit and this typically uses a brown wire to activate...
    view full answer...

  • Junction Box Terminal Post Size for Part # 3375601100
  • The ring terminals you want to use with the junction # 3375601100 are the # 44-5310A which have an inner diameter of 3/16 of an inch.
    view full answer...

  • Replacement 4-Pole Trailer Connector for Utility Trailer with 5-Wire Wishbone Wiring Setup
  • When a 4-pole (4-pin) flat trailer connector actually has 5 wires this simply means it is a 'wishbone' style connector with dual running light wires. These dual wires just make it easier to connect to the running lights on both sides of the trailer. Examples of such items are # A35W42B, # A20WB and # A10-4225VP. If your trailer wiring is still okay and you just need a new 4-pole plug to re-connect the leads from the trailer you can use Hopkins Endurance Quick-Fix Replacement 4-Way Flat...
    view full answer...

  • Creating 7-Way Trailer Connection Adaptor for 13-Way European Bike Rack Lighing
  • We do not have any European 13 way adapters to make your bike rack lights compatible so you will need to rewire it. So you would need to create a custom adapter using a 7-way connector and probably a junction box to protect an external converter box that you will need to separate the stop light from the turn signal for your 13 way bike rack wiring. For this conversion, I recommend the Vehicle to Vehicle Tail Light Converter # 118158 along with the Wesbar Adapter - 7-Way RV to 4-Way or...
    view full answer...


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Info for this part was:

Expert Research:
Jameson C
Installed by:
Cole B
Edited by:
Daron K
Written by:
Brian T

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