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Epicord 7-Way Molded Trailer Plug with Junction Box - 10' Long

Epicord 7-Way Molded Trailer Plug with Junction Box - 10' Long

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Epicord Trailer Wiring - 277-000141
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  • Reviews (243)
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Epicord Accessories and Parts

  • Trailer Wiring
  • Junction Box
  • Epicord

  • Epicord 7-way molded trailer plug and 7-gang junction box
  • 10' Long heavy-duty cord
  • Wire gauge and function:
    • White (ground): 10 gauge
    • Black (12V power): 10 gauge
    • Yellow (reverse/auxiliary): 14 gauge
    • Red (left turn and stop): 14 gauge
    • Green (tail and running lights): 14 gauge
    • Brown (right turn and stop): 14 gauge
    • Blue (brake): 12 gauge
  • Weatherproof and corrosion resistant
  • Hardware included
  • cETL and ETLus Listing
  • Junction box dimensions: 8" long x 2-1/4" wide x 3-1/2" tall
  • 1-Year Warranty

Junction boxJunction box

RV078-10X Epicord 7-Way Molded Trailer Plug with Junction Box - 10' Long


Item # 277-000141

Customer Satisfaction Score:

Customer Reviews

Epicord 7-Way Molded Trailer Plug with Junction Box - 10' Long - 277-000141

Average Customer Rating:  4.7 out of 5 stars   (243 Customer Reviews)


The trailer plug/junction boxes worked out very well! Using them made it a lot easier to rewire the trailer.


Very disappointed that the plug molding is too long for my truck's factory plug outlet. Look at it wrong and it'll fall out of the outlet. I tried trimming it down so the door would hold the cable catch, but the rubber is too soft.


I installed this product yesterday and it is a really nice product. It would be a great product if the darn wire colors from the plug were the same as the industry standard. But if you go by what is on the small mount that the wires screwed to it is accurate.

I got the longer 10' cable as I wanted to mount it further back than the stock metal electrical box that they mount all the stuff in from the factory. I ended up mounting it on the bottom side of the cross braces on the bottom side of the trailer.

I also installed a seperate fuse box to individually fuse all the circuits so that if anything on the trailer shorted out it wouldn't blow the fuses in the truck.

Dakar D.


I loved that I got the longer replacement so I was able to move it to a more easier place to access.


I do business with many prevailers but I have yet to find one equal to E trailer. They are fantastic people to do business with and quality parts. Thanks for being in there.


It was just as expected. Good quality and no hidden issues.

For everyone else’s essay, the studs are 5mm. So, for the best fit grab you some 5mm heat shrink ring terminals. 1/4in for the mounting hardware. This went on my boat trailer, so I grabbed some stainless steel 1/4in hardware and used nylon lock nuts. I used extension cord for my wire runs. A grounded extension cord will give you your 3 wire runs for the tail lights, a standard 2 blade extension cord for any marker/running lights. Heatshrink adhesive butt connectors on all connections. The wiring info that ETrailer provides was correct for my 2019 F150.

Overall makes for a solid trailer light setup. Highly recommend this junction box.


Used this to convert a trailer from 4 pin to 7 blade connector so that I could add brakes. Gives a nice place to terminate your wires. The wire color guide on the product page was very helpful when it came to wiring up the trailer. Plan on putting some type of sealant around the wires because unless you use a large 7 conductor wire there will be a gap where water could get in.


This product is great!! It is probably overkill for my little utility trailer but I was tired of re-wiring it for shorts in the crappy standard wire that came with the light sets. This junction box feels very sturdy and has the cable/plug is very hefty as well. Easy to setup. The colors didn't match what my car was but it is very simple to swap the terminals to what you need. I forgot to take more pictures through out my install.


Little over a year since install and no problem thus far with this product. The rubber grommets supplied with it keeps everything water tight. Wires are not colored coordinated! I overlooked that detail in product description and had to rewire everything, lol.

Etrailer Expert

Mike L.


Actually, theres more than one accepted wire color convention when it comes to trailer wiring color codes which is why we list the function for each terminal/wire color in the product description.


This is worth every penny as far as im concerned. Makes wiring up everything on trailer from plug to tail light so much easier. The junxtion box also makes finding shorts easier since it is the hub for all accessories.


Great all in one unit


Last project built. Used etrailer for almost all parts, 7 pin wiring harness, junction box, tail lights, jacks vent cover and so. Love the leveling jacks. Friend wants one now so started another one. I will be getting all the parts from etrailer...


This is a great part It made wiring
the trailer very easy. It fit underneath the gooseneck and mounted up real nice. I recommend it to anyone that needs to rewire their trailer.


I needed to completely rewire my landscape trailer because of the poor quality of the original components. This is quality hardware. The only issue I had was the color/functions of the new component did not exactly match with the color/functions on my trailer. It was not a difficult issue to overcome.


I took delivery today and installed it onto the body of my slide in camper immediately. Installation was simple and effective. There's multiple slots for every applications. Everything works great.


Absolute Garbage!!! Why would they not follow the 7 pin color code?? Red is reverse, green is running, brown is left blinker, yellow is right blinker??? Why would etrailer sell this garbage?


I just finished mounting this to my trailer frame and it really seems to be a top notch product. It's so much cleaner looking and sealed connections.


STOP!!! Wiring colors are non-standard.

wiring colors do not match the standard. All of the colors are there, they are just rearranged. I hooked it up thinking that it was a color to color matchup like EVERY other product for 7-pin connectors and now I have to replace a special $xx fuse in my truck that I cannot get for 2 days. Not to mention the troubleshooting time.

There are standards for a reason, the products that you sell should adhere to them, or be clearly marked that they DO NOT. Simply listing the colors and hoping that someone notices they're wrong when they're ordering is insufficient.

I have 7 trailers and all of them follow the standard, except this one now.


Excellent product one more step to simplify our trailer building process


Very happy with this product. I'm looking forward to installing it on my trailer. Very solid and well made.


Paul was Fantastic !!! Great customer service !!




Cord was excellent. I was concerned about the wiring of the plug, but the wiring was completely compatible with my 2015 Ford Expedition and Airstream Trailer. (Yellow auxiliary center wire) No changing around of colors on the wire ends. Great!! It would be nice if Etrailer also sold this cord without the box, as I have a great box inside the Airstream for wiring, and had to remove the box to run the cord through the frame tube. But, for the price of the entire product, the box was really a nice "gift" for those who need it. Thanks, Etrailer.

Dale S.


It was very well made and we have had NO problems with it. Thanks.


Can you provide a pin out / wire color vs location on the 7 way plug Epicord 7-Way Molded Trailer Plug with Junction Box - 10' Long - 277-000141 I ordered. I'm seeing several installs where the wire color on this plug dose NOT match standard trailer wire color. Also it did not come with any paper work or instructions stating this. Example yellow is standard trailer for left turn. This 7 way plug looks to maybe use yellow for aux power going by other install photos and research.

This will be a major set back as my trailer has already been compleated and went by standard trailer wire color. ?????

Etrailer Expert

Mike L.


There is more than one accepted color code/wiring convention for a 7-way trailer connector. The color code for the Epicord 7-way plug/junction box is as follows: °White ground: 10 gauge °Black 12V power: 10 gauge °Yellow reverseauxiliary: 14 gauge °Red left turn and stop: 14 gauge °Green tail and running lights: 14 gauge °Brown right turn and stop: 14 gauge °Blue brake: 12 gauge. This is shown on the product description page on our website.


This new cable and distribution box will make the wiring job quick and easy. Trailer previously had a 4-wire system (no brakes) and was not up to current standards for lighting, so I'm replacing everything electrical and adding the brakes. This will help immensely.



This project turned out great! I really like buying from etrailer. They always have what I need, along with great customer service and fast shipping.


Love the 7 way barrel plug! Was easy to mount the junction box and connect the correct wires to the terminals once ring lugs were attached to the wires. Great light/brake trailer system cable and box!!!


Will M.



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Info for this part was:

Employee Mike L
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Employee Jameson C
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