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

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

Item # 277-000141

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277-000141 - Junction Box Epicord Wiring
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  • Wiring
  • Junction Box
  • Epicord
Call 800-298-8924 to order Epicord accessories and parts part number 277-000141 or order online at etrailer.com. Free expert support on all Epicord products. Guaranteed Lowest Price and Fastest Shipping for Epicord 7-Way Molded Trailer Plug with Junction Box - 10' Long. Accessories and Parts reviews from real customers.


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  • Reviews (139)
  • Q & A (240)
  • Videos (2)
  • Photos
  • Why etrailer?

Epicord Accessories and Parts - 277-000141


  • 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

Junction boxJunction box


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

94244







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


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Epicord Wiring - Trailer Connectors - 277-000141 Review

Today we're going to be taking a look at the Epicord 7-Way Molded Trailer Plug with the included junction box. This is going to provide an easier way to get your trailer wired. It provides a 7-way connector for your trailer, that way you can easily get everything connected to the 7-way port on your tow vehicle. The 7-way trailer end connector is already connected to the correct locations within the box. All you have to do is run your trailer wiring inside the junction box, match it up with the correct functions and you're going to be ready to go. This is going to measure 10 feet long. It's a heavy duty cord so it's going to give you the length that you need and it's going to provide the protection to the wires that we're looking for.

It's going to feature a weatherproof and corrosion resistant design, which is going to help insure that this plug is going to last for years. Taking a look at the trailer end plug right here, that's going to connect to the tow vehicle. It's got the finger tabs, which allows for easy connecting and disconnecting, and it's got the tab here on top, we call that an alignment tab and that's going to align in the groove in the socket that would be on the 7-way connector on the vehicle. We're going to take a look inside the junction box real quick. It's got 2 screws here on top that holds the lid on to the bottom portion of the box. They'll be Phillips head screws, we can easily remove those. Then we'll point out some features about the box.

The lid easily comes off. Inside here, you can see that it's going to have the posts. I do want to mention that these posts are going to be color coded, they've got the tips colored. It's going to say the color coding on this side of the posts and on the bottom side it's actually going to label the functions. So right here, it's white, it says white on this side and on the underside it says ground.

So we know that the white wire connects to the white post and that's going to be the ground function. That's going to be our ground wire. Also, I want to point out that on the 2 ports right here to run wires through, we'll see that they've got the rubber plugs. I'll just go ahead and remove all of those so we can get a better look at it. It's going to have set screws located in here so that way, when you run the wiring through, you can tighten down those set screws and it's going to bring a clamp down over the wires which is going to help keep dirt and moisture and any other elements out of the box. It's going to come with solid plugs, that way whatever holes you're not using .. You've got 2 on this side and then 1 on each side of the box.

Whatever holes you aren't using, you can use those solid plugs to cover up. It's going to come with 4 plugs that have pre-cut holes in them already. That way you can run your wires through. That acts as a grommet so it still allows you to run the wires through, but it's going to keep out anything that could pass by the wires. Both of those are included, 4 of each. 4 solids, 4 with pre-cut holes. It seems like a really nice design. Again, weatherproof and corrosion resistant design. Hardware is included for each connection port inside the junction box. Your mounting hardware is sold separately. You can see here on the bottom of the box, we're going to have 2 mount hole locations, 1 on each side. If we take a measurement, the distance between those mount holes, that's going to give us a measurement of 7 and 3/8ths of an inch. The overall length from edge to edge, those mounting tabs, that looks to measure about 8 and 1/8th inches long. The width of the box, that's going to measure about 3 and 1/4 inches. Let's go ahead and put that lid back on and then we can go ahead and give you a measurement of the overall height as well. The diameter of those mount holes is going to measure 5/16ths of an inch. Again, mounting hardware is not included so that will need to be provided separately. We'll take a look at the overall height of the box, we can see that that's going to give us a measurement of about 2 and 1/4 inches. This is CETL and ETL US listed, which means that this product has been tested and meets the safety standards for use in Canada and for use in the United States. That's going to do it for today's look at the Epicord 7-Way Molded Trailer Plug with the included junction box.


Customer Reviews

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

Average Customer Rating:  4.7 out of 5 stars   (139 Customer Reviews)


- 277-000141
by:

Works great ! 565844



- 277-000141
by:

I bought this to replace the cord on my 5th wheel. The original one is OK, but the plug doesn't lock into the new receptacle I installed in the truck bed. This new plug is molded to the cord, and has dual contacts (better electrical connection) and the lug is of the proper dimension to hold it securely in the receptacle. The construction of the terminal box is satisfactory, the wire sizes are adequate, and the cord jacket appears to be thicker than most. The cord is flexible. 412723



- 277-000141
by:

This makes everything easier, particularly when a breakaway is also added to the system. All connections-- brake control wires, lighting wires, breakaway wiring, breakaway battery wiring-- is connected here. I used it on a small 5x10 covered utility trailer, and the cord was way too long. I could have shortened it, but I chose the easier route of wrapping the excess in a big loop and tying to the A-frame. 566060



- 277-000141
by:

My trailer plug with junction box came in a timely manner and was exactly what I was looking for. Very heavy duty and will make my connections much cleaner, excellent price as well. I would highly recommend etrailer. 304786



- 277-000141
by:

all colors matched trailer wiring... I soldered all connectors... there's and mine.. good to go. better then the Factory butt connectors.. 402094



- 277-000141
by:

Great concept, only it came wired incorrectly in the junction box. Got it all wired to the trailer only to find out it was wired wrong. Then had to ohm out all of the pins in the connector to the studs in the box. Really dissappointing. 597069


Comments

There is more than one accepted wiring convention for a 7-way trailer connector, which is why we specifically state which wire color carries which circuit in the product description above.

-- Mike L - 01/14/2019

48546

- 277-000141
by:

Order was complete and delivered in a timely manner. Only problem (minor) was the 7way pigtail was not wired to color code. Had to use test light to get 3 of the wires in correct location. Could be a problem if someone wasn't comfortable with ringing out wires. 375359



- 277-000141
by:

It couldn't be simpler and the look of it is clean! I will say this though, pay attention to the wiring diagram for this, it is not a standard trailer wiring scheme, and until I emailed in and they sent me another diagram I was lost. Once I got straightened out though, my trialer is awesome. Super easy to install and wire. Also the adapter end that hooks up to your car is well made and very durable. 570906



- 277-000141
by:

Used this to allow a plug and play to hook up needed tail and brake/running lights on my LanceCamper. Spliced the female Lance plug into the provided junctions in the box. Worked great. No under the truck cutting into the wiring harness. 572944



- 277-000141
by:

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. 423934



- 277-000141
by:

Epicord 7-Way Molded Trailer Plug with Junction Box. I have purchased many items from etrailer and this product is another example of the quality products they represent. 281557


Comments

Remains water tight and took a unsightly wiring mess and organized it. should have purchased sooner

edgewater - 08/13/2017

27126

- 277-000141
by:

Anthony was very helpful,I needed a trailer pig tail and junction box 7 pole. Was going to order two items.Anthony pointed out that a combo kit was avialable for a substantial savings. Anthony notified me product was not avialable but kept update when it was. He also notified me when it was going to be shipped and it arrivied on time in the best possible condition. I have done business with E-Trailer before by this experience was far beyond just a business tranaction with a customer.Hope all tranactions will be as pain free as this one was.All wire from trailer frame was remove before restoration,new box made rewire easier and neat. The only issue i have is that a wire schematic was not included with the harness and box . Would have made it easier to install for those who don't know the wire paths. Thanks Steve Koza. 325076



- 277-000141
by:

Ordered this to replace the very poor factory wiring on my 18 foot car trailer. Very impressed with quality and with quick delivery of product. I would recommend measuring your trailer to make sure the 10 foot cord is not too long. I didn't measure first but I was lucky and was able to make it work. Only complaint is what many others have said about the wire color. I know wire color may vary based on manufacturer, but the standard wire color chart on this very website is different from the colors in this plug. It is not hard to figure out, mostly just annoying having to use a circuit tester to verify the wires or having the color chart pulled up. Overall great product, Just annoying about the wire color. 396368



- 277-000141
by:

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... 486389



- 277-000141
by:

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. 345179



- 277-000141
by:

Nice quality item, too bad the pin configuration on the plug had all the wires connected incorrectly at the box. What should have been simple "follow the colors" wiring, ended up blowing fuses in my Tahoe and causing me to have to "pin out" the cable and rewire the box entirely. What a nightmare! 572006


Comments

There are many accepted trailer wiring color codes. For this reason we recommend testing the wiring by function with a circuit tester such as part # 40376.

-- Heather A - 10/06/2018

44365

- 277-000141
by:

This is a great part It made wiring in 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. 353210



- 277-000141
by:

Connector was pinout was not correctly color coded. Otherwise a good product 401641



- 277-000141
by:

As always my shipment was delivered on time. Package contents were all in good shape. The instructional tapes are great. The best thing is the price. 339124



- 277-000141
by:

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. 318401


Comments

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

Dakar D - 11/20/2017

31101

- 277-000141
by:

The one I received does not work. The pins inside are different sizes as you can see the smaller ones are spread and only plugged in once. I am contacting etrailer next to resolve. Already cut my wiring for this application. I wanted a weather tight enclosure rather than a house electrical box. 572418



- 277-000141
by:

I got the Epicord plug and junction box. The junction box looks great, it looks to be a little better construction than other junction boxes I've seen. The cord is really nice, heavy duty and well insulated. I wasn't too keen on the plug, the terminals inside were a different style than a lot of the other brands. It did indeed plug in to my truck, but I wasn't really happy with it, so I kept the junction box and ordered a replacement cord that was the same brand as the plug on my vehicle, for consistency. I didn't want to run the risk of re-doing this wiring project later on. I should have just ordered separate products from the start. 553777



- 277-000141
by:

The build quality is great! 568465



- 277-000141
by:

I have had this for a year now on my gooseneck flatbed trailer and have had zero issues. I plan to buy this for my horse trailer as well. The box stays sealed and it is supper easy to add connections to or check wiring with a multi-meter when a light quits working. The end is holding up well and I have no connectivity issues. The cord is long enough for 90 degree turns with plenty of slack (plug is in bed). I definitely recommend this product. 497347



- 277-000141
by:

My daughter bought a used trailer for her horse. The wiring plug wasn't in great shape & there was no junction box, the cable was only connected to the trailer wiring with wire nuts. I bought the Epicord 7-Way Molded Trailer Plug with Junction Box & installed it. It's working great. Also, if there are any electrical issues down the road, I now have a break out box to check voltages, shorts, etc. 425171



- 277-000141
by:

to bad this product is made in china the cable strain reliefs are plastic should be metal 641047



- 277-000141
by:

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. 637437



- 277-000141
by:

Seems well made. Cord is high quality with a rubber molded plug. The junction box makes it very easy to wire everything up without unsightly butt splices. 637379



- 277-000141
by:

Easy setup, worked great! 637001



- 277-000141
by:

Makes wiring super easy and clean. Awesome product. 635563



- 277-000141
by:

Everything arrived in perfect condition and exactly as ordered. One item was backordered and I received a phone call giving me the option of cancelling the whole order, which I didn't want to do, but appreciated the offer and knowing ahead of time. This is a great company to do business with. If I need more parts, will definitely use this company. 633603



- 277-000141
by:

I have been buying products from etrailer for about 5 years now. Ive never been disappointed with any of my parts! I work on a wide range of equipment/trucks / trailers and my latest purchases are exceptional! Great quality at the right price!!! Shipping is a breeze , i recomend anyone who is in the repair business to give them a shot!!!! You wont be disappointed!!! 629564



- 277-000141
by:

Well made and works as it should. 629313



- 277-000141
by:

This product among many that I've purchased from E trailer is high quality and durable. E trailer sells quality products at a fair price. I'm in the process of rewiring my Jeep trailer and installing a new deck. All my electrical items for lights and electric trailer brakes will be purchased from E trailer. Also will be picking up the necessary hardware to secure the Jeep to the trailer suck as e track and accessories. 628821



- 277-000141
by:

Arrived on Time and seems to be very well built. Should work well to upgrade my dirt bike hauling trailer from 4 pin to 7 pin. 625364



- 277-000141
by:

The unit was easy to install, has been working flawlessly and has stood up to constant use for a year. It gets used a minimum of twice a week through rain, snow, sleet and hail. Dirty, dusty, grimey and hot. Can't ask for more! 621644



- 277-000141
by:

Excellent service 616554



- 277-000141
by:

THE ONLY WAR TO WERE A TRAILER I LOVE IT I wouldn’t concede any thing else 609278



- 277-000141
by:

Great quality, easy installation, concise instructions at a reasonable cost. The folks at etrailer are top knotch 608219



- 277-000141
by:

Ordering was simple. Shipping was fast. Got exactly what I ordered. Good product. Just wish they had it in the auto industry standard wire configuration rather than just RV. It will work just the same. Just different wire colors, so pay attention when wiring. 607965



- 277-000141
by:

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. ????? 606861


Comments

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.

-- Mike L - 02/21/2019

49739

- 277-000141
by:

Awesome customer service!!!! 606785



- 277-000141
by:

Everything we’ve ordered from you has met our expectations. We’ve ordered many times and will again. You have great products and excellent service and the prices are great. 606553



- 277-000141
by:

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. 606105



- 277-000141
by:

Easy install and Does what it was supposed to do 602572



- 277-000141
by:

Exactly what the Doctor Ordered 602602



- 277-000141
by:

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. 601817



- 277-000141
by:

Looks to be very high quality. I will be installing over the holidays 589689



- 277-000141
by:

Thank you, I got them and they are exactly what I ordered. Great price and fast shipping 589402



- 277-000141
by:

Worked well. Good quality. 585582


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  • Integrated Brake Controller, Hydraulic Brakes and Trailer Wiring for Boat Trailer
  • If your boat trailer has a mechanical surge actuator coupler like # 8605001 then no trailer brake controller is required. The inertia of the trailer moving forward provides the compression to push hydraulic fluid to the brakes. If on the other hand you have an EOH system, electric-over-hydraulic, such as with an actuator like # HBA-12 for drum brakes or # HBA16 for disc brakes, then you DO still need a trailer brake controller to deliver the electrical signals to the actuator, which...
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  • Electric Brake Conversion from Air Brakes on 15,000 lb Axle Trailer
  • The Dexter Electric Brake Kit w/ Cast Backing - Self-Adjusting - 12-1/4" - Left/Right Hand - 15K # 23-446-447 will fit any 15K axle that have the standard 7 bolt mounting flange. These are self-adjusting brakes so there is no need for manual adjustments after the initial installation. They are labeled left-hand (driver's side) and right-hand (passenger's side) to ensure proper placement. If you need the mounting hardware, I recommend # BRKH122510 for each axle. You will also need...
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  • Re-Wiring 7-Way RV Style Trailer Side Wiring Connector
  • I can certainly help you re-wire your trailer-side 7-Way connector. Thanks for the photo of your connector, it helped verify the style connector and which wires you have! The attached wiring diagram will help you in attaching the wires back to your connector. Based on your photo, the only wire you don't have is the Blue wire that would be for the Brake Controller Output/trailer brakes signal. The Green wire should carry the Tail and Running light circuit, Black is 12V power, Yellow is...
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  • Recommended Actuator and Wiring for Boat Trailer Upgrade From Surge Brakes
  • To add EOH to a surge brake trailer, you will need to add the electric components to make the actuator function. You can get the Epicord 7-Way Molded Trailer Plug with Junction Box - 10' Long # 277-000141 and then wire your actuator into that junction box. You will be able to simply connect to your current hydraulic brake lines. For your actuator, I recommend the HydraStar Vented Marine Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi # HS381-8067 or the HydraStar Vented...
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  • Parts Needed to Add Brakes to Single Axle Boat Trailer
  • You can increase the size of the wheels and tires on your boat trailer so long as you have enough room in the wheel/fender wells. Normal suspension travel usually dictates no less than 4-inches of clearance at the top of the tire. Provided you have enough room to prevent the larger tire from contacting any trailer surface you can go with ST205/75-15 rims/tires; the linked page displays all products that combine a 5-on-4-1/2 rim with a 205/75-15 trailer tire. For instance, part # A15R645SMD...
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  • Wiring Diagram for Home Made Trailer
  • I've linked an article on trailer wiring that includes a diagram you might find helpful. One solution to help wire everything together is to use a junction box with your trailer's 7-way connector, like # 277-000141. This way you can run all of your trailer's wires to the box instead of to the back of the connector. To wire you brakes you'll want to use 10 gauge wiring # 10-1-1. For the lights you can use 16 gauge, # 16-1-1. Both are sold by the foot. When looking into the back...
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  • Can the Capacity of a Trailer be Increased by Upgrading the Axle?
  • Since your trailer currently has a 3,500 lb axle, the restriction of 2,990 lbs max capacity must be due to another component on your trailer that doesn't have the that high of a capacity. This could be your coupler, leaf springs, wheels, tires, or the frame itself. If the frame itself is rated the lowest, then your capacity cannot be increased, but any of the other components does give that ability to increase weight capacity. The weight capacities should be listed on the individual...
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  • Recommendation for Adding Electric Trailer Brakes to Trailer with 3,500 lb Axles & 5 on 5 Inch Hubs
  • For your 3500 lb axles, I recommend starting with the Electric Trailer Brake Kit - Self-Adjusting - 10" - Left and Right Hand Assemblies # AKEBRK-35-SA. These assemblies will self-adjust to ensure you have the best braking without needing to manually adjust them every few months. Then for your 5 on 5 inch hubs, I recommend the Trailer Hub and Drum Assembly - 3,500-lb Axles - 10" Diameter - 5 on 5 # AKHD-550-35-K. If you have the spindles with the integrated grease zerk, then you will...
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  • Parts Needed to Add Electric Brakes to 6 x 14 Cargo Trailer with a 3,500 Pound Axle
  • The brakes I suggest for your 3,500 pound axle are the self-adjusting # AKEBRK-35-SA assemblies. Since they're self-adjusting you need to do an adjustment when you install them but that's it. The hub and drum assembly to match your bearings and bolt pattern is # AKHD-545-35-EZ-K. This includes new bearings, races, grease seal, grease cap, and lug nuts. For the 7-way trailer connector I like # 277-000141. It's attached to a junction box to make wiring everything easier. You'll also...
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  • Parts Needed to Change a Triple Axle Kaufman Trailer from Electric to Electric Over Hydraulic Brakes
  • To change your electric brakes on your Kaufman trailer to an electric over hydraulic (EOH) system you will need to hydraulic brakes, brake lines, an EOH actuator, a breakaway kit (which you should already have), and a brake controller (which you should already have). I highly recommend going with the HydraStar EOH Actuator # HBA-12 which is one of the best options out there and has received great reviews from other customers. We hardly ever see any troubleshooting questions about these...
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  • Electric Brakes for 10" Wheels on a Snowmobile Trailer
  • The Electric Trailer Brake Kit # AKEBRK-2 that you referenced should be the correct size to replace your hydraulic brakes for your 10" wheels. You can quickly verify this by measuring the diameter of your current brakes. You should be able to use the Trailer Hub and Drum Assembly # AKHD-545-2-2K but you need to verify that the # L44649 inner and outer bearings match what you currently have as well as the 5 on 4-1/2" bolt pattern. You also need a 7-Way connector on your trailer like...
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  • Recommended Hubs And Electric Brake Assemblies For Tandem Axle Snow Bird Snowmobile Trailer
  • You can add electric brakes to both axles of your Snow Bird Snowmobile Trailer. To do so you will need new drums only on the axles that don't currently have brakes. You may be able to use your current surge brake hubs for your electric brake assemblies, but often electric hubs on this smaller size require a change due to thickness of the hub. For your hubs, I recommend the Trailer Hub & Drum Assembly - 2,200 lbs. Axles - 4 on 4 # 8-173-16UC3. For your electric brake assemblies, I...
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Info for this part was:

Expert Research:
Jameson C
Video by:
Jacob T
Expert Research:
Adam R
Video Edited:
Dustin K
Installed by:
Cole B
Photos by:
Amber A
Expert Research:
Jeffrey L
Installed by:
Randy B
Photos by:
Zach O
Written by:
Mary E
Updated by:
Sarah W

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