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  4. Trailer End Connector
  5. 7 Round - Blade
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Epicord 7-Way Molded Trailer Plug - 8' Long

Epicord 7-Way Molded Trailer Plug - 8' Long

Item # 277-000143
Our Price: $41.27
Trailer Wiring
Shipping Weight: 2 lbs
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277-000143 - Trailer End Connector Epicord Trailer Wiring
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Great Prices for the best trailer wiring from Epicord. Epicord 7-Way Molded Trailer Plug - 8' Long part number 277-000143 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (90)
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Epicord Trailer Wiring - 277-000143

  • Trailer Connectors
  • Trailer End Connector
  • 7 Round - Blade
  • Plug and Lead
  • 6 - 10 Feet Long
  • Epicord

  • Epicord 7-way molded trailer plug
  • 8' Long heavy-duty cord
  • Weatherproof and corrosion resistant
  • 1-Year Warranty
  • cETL and ETLus Listing

Wiring Code
Molded Connector Function Usual Trailer Wire
White WireGroundWhite Wire
Red WireLeft Turn and BrakeYellow Wire
Brown WireRight Turn and BrakeGreen Wire
Green WireTail LightsBrown Wire
Blue WireBrake PowerBlue Wire
Black Wire12 Volt (hot lead)Black Wire
Yellow WireAux. -

RV078-8 Epicord 7-Way Molded Trailer Plug - 8' Long


Customer Satisfaction Score:

Customer Reviews

Epicord 7-Way Molded Trailer Plug - 8' Long - 277-000143

Average Customer Rating:  4.7 out of 5 stars   (90 Customer Reviews)


Promising product with the terrible customer service. Order arrived damaged so the customer service initially promised the full replacement which never happened. After the delayed communication the customer service decided to process it under the warranty claim which never happened. Never recommend to do business with this company again.


Cord is made of sturdy material and comes with 8' of length to attach to your trailer. The molded plug is solid and connects great to the receptacle on my truck. You will not be disappointed in this product, I also purchased a terminal box that made install a breeze and looks good too.

Richard P.


Excellent sturdy wiring and harness, It is still holding up strong.


Seems like very good construction. One could only hope for more options like this with the “traditional” trailer wiring standard. I guess its Brown to Green, Purple to Yellow, Yellow to Red for me!


I used this cord to replace the intermittent cord on my enclosed trailer. I have been using this for over a year and it is still working fantastic.


Beware! The colors don’t match up. Why the heck can’t I just connect brown with brown and green with green or yellow with yellow? The cord itself is fine, but having to open the junction box again and swap things around is irritating. If you need a new cord for a new rewire, this one is great other than the colors are off.


Item # 277-000143. And distribution box. Been on trailer about a year now, cord and all contacts in box have no rust or corrosion, GREAT for tracking down shorts. Lost one star because, the wires on cord are not correct colors, so had to use mutimeter to chk right connections. Would definitely recommend these products


Exactly what was needed for the trailer. Very durable, would highly recommend this part and this company


excellent construction. Fixed my loose plug problems.


The wire and plug seem to be of good quality, and it was easy to install on my trailer using some crimp tabs. It's sufficiently long to accommodate drop hitches and other unusual circumstances. So far it works great!



After a year the plug is still working great. We dont use it that often but it sits under a cover to protect it from sun and rain.


Soldered it up and it worked fine.



Etrailer Expert

Jenny N.


Oh my goodness! I would say that this not typical to hear with this harness. Customer Service will be touch with you.


It was the exact part we ordered and it fit perfect!!


I pinched my camper's original harness, cutting 3 of wires. This harness is a direct replacement. Works great.



Not issues with this trailer wiring harness after one year of use.


As it has been in the past, it is always an excellent experience shopping through Products shipment fast and exactly as expected, customer service and order follow up starts immediately after the order takes place. Returning to shop with etrailer is a no brainer!

Hector C.


Great perfect fit, exactly what I needed after damaging OEM on a tight turn when it got pinched. ETRAILER is my no.1 place to go with fast shipping and accurate information. Thanks


Very well constructed. The wires are good quality and the plug connects securely to the receptacle in my truck. The old connector had a replacement plug on it and it was shorting causing issues with the lights and brakes on the trailer. Rather than trying to put on a new plug I went with a whole connector assembly and it works great.


Perfect! Works like a champ, for years I've used plastic conduit and electrical tape, it never holds up and looks bad. This cable and a junction box made my trailer rebuilt project look professional!


Good gauge wire, prongs have lasted with out damage. standing up to the sun and dust so far has not been a problem. Gets up to 100* + Fahrenheit up in the high desert. No cracks or drying up yet. When we get snow the cable does get a little stiff with the cold. It does not get colder then 29* F out here so cant tell you how stiff it gets bellow that temp.


Great coming with awesome products. Great prices and excellent customer service. Unfortunately 3 days after I wired in the 7 way pigtail I bought debre on the road rip the cord out of the truck and the asphalt ate the plug end at 75 mph


Had to do a few minor modifications to get them to work, but i was happy to use your products. I thought that modifying electric brakes to work on boat trailer would involve some minor modifications.Over all i was very satisfied with the quality of your components. Thanks.


I like this item a lot, it seems good quality and is exactly what I needed. The only downside is that the wire colors are not standard. I was aware of this from other reviews, so I made sure to verify which wire was which before connecting them permanently. As always etrailer's service, prices and selection is top notch. I give the product 4 stars, but etrailer is still 5 stars in my book!


I purchased a trailer tow electric cable for my camper.
The quality of the cord is excellent, the price is very affordable and delivery of cord came days earlier than expected. Installation was done in less than an hour.

Overall I am very pleased with the product and the customer service that I received from dealer! Will definitely be a return customer !


This is a very well made trailer plug and it makes very consistent connections between the truck and the trailer.


I ordered the junction box and trailer cable plug. Both arrived very quickly and were easy to install. Great company to deal with as I have ordered several times and have always had good experiences.


Product worked great! Easy to install.


Rapid delivery. Good quality product.

Show More Reviews

See what our Experts say about this Epicord Trailer Wiring

  • Will Epicord 7-Way Molded Trailer Plug # 277-000143 Fit 7-Way Connector on 2017 Mercedes Sprinter
    Assuming that your 2017 Mercedes Sprinter 2500 has a 7-Way trailer connector (either factory or aftermarket) then yes, the Epicord 7-Way Molded Trailer Plug # 277-000143 will plug into the van's trailer connector. I have linked a video review of this connector for you.
    view full answer...
  • Is there A Back Up Light Function on the Epicord 7-Way Molded Trailer Plug?
    Yes, this Epicord 7-Way Molded Trailer Plug # 277-000143 has all the functions of a 7-way. Including the back up circuit of vehicle's wiring harness to the Back up lights of the trailer. I have also attached a help article on the functions of a 7-way.
    view full answer...
  • What Gauge Wires are Used Epicord 7-way Connector part # 277-000143
    The Epicord 7-Way Molded Trailer Plug part # 277-000143 has three different gauge wires in the cable. There are two 10 Gauge wires (black/white) there is one 12 gauge wire (blue) then there are four 14 gauge wires (yellow,green.brown and red). These sizes are typical of most 7-way trailer end connectors.
    view full answer...
  • Will Epicord 7-Way Molded Trailer Plug # 277-000143 Work with the 7-Way on Chevy Trucks
    You should not have any issues using Epicord 7-Way Molded Trailer Plug # 277-000143 with the 7-Way on your Chevy truck. It is a standard 7-Way just a slightly different design for the pins like you said. This design allows for more contact between the pins on the truck's 7-Way and trailer 7-Way. We have not heard any complaints from our customers on this part either. I have included a link to a video review of this wiring harness for you.
    view full answer...
  • Troubleshooting Trailer Wiring Install Where Blinkers Activate Both Sides of Trailer
    Sounds like you might have swapped the turn signal circuits and the running light circuit on your trailer wiring. This would cause both of the blinkers to flash when you put on either blinker. So what I would recommend you do is start over with the wiring connects. Use a jumper wire from a 12 volt battery positive post to run voltage to each of the trailer wiring circuits so that you can identify what all of the circuits are. And then use the diagram you found already to make the connections...
    view full answer...
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  • Replacement 7-Way Plug and Lead to Replace Damaged One that Got Drug While Driving
    You'll want to install a new plug and lead on your trailer to replace the damaged one. Would be a good idea to go with a longer one than you have now. The the adapter you referenced has a 7-way I am fairly certain that's the type of trailer connector you have. Especially since that's very common on camper trailers like you have. We have the part # 277-000143 which is a 7-way that has an 8 foot long lead that would work well.
    view full answer...
  • Solution for Wiring in 7-Way to Vehicle Wiring and Trailer Lighting Functions Stop Working
    Since not all trailer wiring colors match your best option is going to be to use a circuit tester like part # PTW2993 to identify all of the functions of the wiring on your vehicle and then using the attached diagram wire it up accordingly. I attached a video that shows how to test the wires as well.
    view full answer...
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  • Replacement 7-Way Recommendation for Trailer with Damaged 7-Way Wiring
    We have a replacement 7-way tha has an 8 foot long lead section you can use to wire to your trailer's wiring as part # 277-000143. For a pack of 10 butt connectors then we have the part # DW05745-10.
    view full answer...
  • Recommended 7-Way Trailer Wiring Harness for Featherlite Car Trailer
    For your Featherlite car trailer you referenced, I recommend the Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector # HS381-9000. This will allow you to connect the wires within a junction box to avoid in-line splicing.
    view full answer...
  • Making 7-Way to Camper Shell Third Brake Light Adapter
    You can use 7-way trailer wiring with the module part # PP20-702 to provide power to the third brake light of your camper shell/cap. Basically the stop/turn circuits of the trailer wiring need to run to the yellow wires of this module and then the green wire goes to the third brake light. For an 8 foot 7-way plug and lead you'd want the part # 277-000143. The wire colors of this you'd run to the module are red and brown.
    view full answer...
  • Can Pacer PP20-702 Logic Module Separate Brake Lamp Signal for 3rd Brake Light on Camper Shell
    It looks like you're on the right track. The # PP20-702 module will separate the brake signal out from the turn signals and the # 277-000143 can be plugged into the 7-way in your truck bed and will provide access to the turn signal circuits for the module, as well as a constant 12V circuit. I'll provide a copy of the wire color codes used by the # 277-000143.
    view full answer...
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  • Parts Needed to Replace Trailer Connector on 2018 Rockwood A122s Pop Up Camper
    I have a solution for you, but there is not a "plug and play" type wiring solution available for this so you would need to cut your existing wires. Once you've done that, you can use the etrailer # HS381-9000 which has a cord and comes with a junction box. If you wanted to go with something slightly shorter, like the # 277-000143 that you were looking at, you can use that 7 way and add the Junction Box # 3375601101 to complete the wiring on your 2018 Rockwood A122s pop-up camper.
    view full answer...
  • Is There a Plug-In Adapter for Trailer To Use EZ Connector
    In order to replace the 7-way trailer connector on a 5th wheel with the EZ Connector you must cut off the old one and splice on the new one such as the EZ Connector Magnetic 7-Way Trailer Connector part # 319-S7-07 as there isn't a plug and play adapter.
    view full answer...
  • 7-Way Socket to Go with 7-Way Plug and Lead # 277-000143
    For a 7-way socket to match the part # 277-000143 the part # A10-7082VP is a great option. Both of these fit the standard RV blade style 7-ways.
    view full answer...
  • Troubleshooting Trailer 7-Way Plug that Wants to Disconnect from Vehicle Connector
    The standard 7-way trailer connectors have always had the same diameter. There isn't a smaller diameter size that's out there that your trailer would have and be causing the problems you mentioned. Most likely your best solution is to replace the 7-way plug on your trailer like with the plug and lead part # 277-000143. Or for just the plug you could use the part # PK12706 and you'd be good.
    view full answer...
  • Recommended Replacement Molded 7-way Trailer Plug and Cord
    The Epicord # 277-000143 7-way plug you'd looked at would indeed make a better connection than something like the # H20044 that just has the single contact. Keep in mind, the wire color coding on this plug/harness might be different than what you already have, so be sure to look at the chart on the # 277-000143 product page that lists the wire colors and their purpose. Are you having issues with the plug not staying fully seated? Because the spring loaded lid for the trailer connector...
    view full answer...
  • 7-Way Connector and Fusion LED Trailer Lights Functions by Wire Color
    I can tell you which wires on each the light and plug are for, though you will want to use a circuit tester such as # PTW2993 to verify the functions. The Fusion LED Trailer Taillight # STL211XRFHB has a 4-wire pigtail. The white wire is ground, brown wire is backup light, red wire is brake light and black wire is taillight. The Epicord 7-Way Molded Trailer Plug # 277-000143 is a 7-way connector that has the same functions as you see in the accompanying diagram. The yellow wire on this...
    view full answer...
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  • Can 7-Way and 4-Way Both Install on Trailer for Separate Wiring Circuits
    When you say rear lights do you mean like utility lights so that you could see in the dark? If so you could just use the 12 volt accessory circuit of the 7-way to accomplish that. But aside from that you certainly could have two different connectors on your trailer for two different sets of lights. For a 7-way plug all you'd need is the part # 277-000143 and then for a 4-way part # A25W2GWB for 25 feet.
    view full answer...
  • Parts Needed to Install Tekonsha Prodigy P3 Brake Controller on a 1969 Chevy C10 Pickup Truck
    The Tekonsha Prodigy P3 Trailer Brake Controller # 90195 is essentially a universal fit (like pretty much every other aftermarket brake controller) and while there isn't a plug and play connector, you can still install it by connecting the wiring from the pigtail to the following functions on your 1969 Chevy C10 pickup: Blue - 7-Way Output to Trailer Black - 12V Power White - Ground Red - COLD Side of Stop Light Switch (only gets hot when brake pedal is pressed) If you don't already have...
    view full answer...
  • Brakes, Hubs, and 7-Way Plug for Viking Popup Camper
    We can most likely help with what you need but we need more info from you to pick out what you need. For hub/drum replacements I need to get the bearing numbers from your old hubs or the dimensions of the spindle on your trailer axle. From there we will be able to determine which brake assemblies you'd need. Then for wheel and tires I need the bolt pattern of your wheels and the tire size that's on the sidewall as well. Do you have a 4-way or a 7-way connector?
    view full answer...
  • Converting Hydraulic Surge Brakes to Electric Trailer Brakes on Boat Trailer
    If you want to convert from hydraulic to electric brakes, you will need to replace the entire brake assembly including the backing plate. The assemblies will come with the shoes, magnets, and backing plate. Then you will need brake wiring # 10-1-1 to run up to a 7-way. The easy connection is to use a molded cord like # 277-000143 and some heat shrink connectors like # DW05745-10. I recommend disconnecting your wiring prior to launching or loading your boat at the ramp. Water and...
    view full answer...
  • Parts Needed to Add Electric Drum Brakes to Boat Trailer with 3500-lb Axle
    The Axle Tek 10-inch electric trailer drum brake assemblies # AKEBRK-35L-SA and # AKEBRK-35R-SA are the left- and right-hand drum brake mechanisms only and do not include hubs/drums. The pair has sufficient stopping power for a 3500-lb-rated axle. An example of a compatible hub/drum assembly is the Axle Tek # AKHD-545-35-K, which has the popular 5-on-4-1/2 wheel bolt pattern and that uses inner bearing L68149 and outer bearing L44649. Adding electric drum brake to a trailer requires a...
    view full answer...
  • Why Do Some 7-way Plugs Use Dual Contact Surfaces
    A 7-way (female) vehicle socket like # PK12-707E has a single blade contact; these fit in between the dual contact surfaces in a (male) trailer plug like # 54006-059, # 277-000143 or # A10-7W10 and the connector (type BB) shown in your photo. Some 7-way male plugs will use a single blade contact, such as the plug on Hopkins 7-way extension # HM20049. This item's female socket and male plug happen to both use the single contact. Both types are compatible with each other. The Bargman Double-Ended...
    view full answer...
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  • Parts Needed To Install 7 Way Plug on Trailer
    Since a 4 way connection does not provide you with the capabilities to control the trailer's brakes, you would need to convert your boat's 4 way connector into a 7 way using something like the Epicord # 277-000143. In order to make wiring a bit easier and more organized, I also recommend using a Junction Box like the # 38656 so that you can connect all of the trailer wires to the box and then neatly wire the Epicord to the box. This will help ensure that all of your wiring is cleanly installed...
    view full answer...

Do you have a question about this Trailer Wiring?

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video by:
Joshua S
Employee Cole B
Installed by:
Cole B
Employee Brent H
Installed by:
Brent H
Employee Chris R
Video Edited:
Chris R
Employee Mary K
Written by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B

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