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Mighty Cord 7-Way RV-Style Trailer Connector w/ Molded Cable - Trailer End - 8' Long

Mighty Cord 7-Way RV-Style Trailer Connector w/ Molded Cable - Trailer End - 8' Long

Item # A10-7W8
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Wiring A10-7W8 - Trailer End Connector - Mighty Cord
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This molded, 7-way, RV-style, trailer-end connector allows you to connect your trailer to your vehicle. Durable molded rubber construction and corrosion-resistant terminals withstand the elements. Lowest Prices for the best wiring from Mighty Cord. Mighty Cord 7-Way RV-Style Trailer Connector w/ Molded Cable - Trailer End - 8' Long part number A10-7W8 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (22)
  • Q & A (3)
  • Videos (2)
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Mighty Cord Wiring - A10-7W8

  • Trailer Connectors
  • Trailer End Connector
  • 7 Blade
  • Plug and Lead
  • Mighty Cord
  • 6 - 10 Feet Long

This molded, 7-way, RV-style, trailer-end connector allows you to connect your trailer to your vehicle. Durable molded rubber construction and corrosion-resistant terminals withstand the elements.


  • 7-Way blade-style plug allows you to connect your trailer to your vehicle
  • Durable molded rubber construction
  • Corrosion-resistant terminals withstand the elements
  • Simple installation
    • Hardwire to existing trailer wiring


  • Harness length: 8'
  • Wire gauges:
    • Red, brown, green, and yellow: 14 gauge
    • Blue: 12 gauge
    • White and black: 10 gauge
  • Wiring configuration:
    • Yellow: auxiliary and reverse lights
    • Green: tail lights
    • Brown: right turn and brake lights
    • Blue: electric brakes
    • Black: 12V battery charge
    • Red: left turn and brake lights
    • White: ground
  • 1-Year warranty

A10-7W8 Mighty Cord 7-Way Blade-Style Molded Trailer Wire Connector - 8'

California residents: click here

Video of Mighty Cord 7-Way RV-Style Trailer Connector w/ Molded Cable - Trailer End - 8' Long

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

Video Transcript for Mighty Cord 7-Way RV-Style Trailer Connector Installation

Speaker 1: Today we'll be having a look at, and showing you how to install the Mighty Cord, 7 way RV style trailer connector. Part number A10-7W8. Now your cord can become damaged in many ways. Most commonly, you forget to unplug it when you uncouple from your fifth wheel trailer or your other type of trailer that you have, and it breaks off or tears. Something of that nature. Or it drags on the ground somehow when you're towing your trailer and it wears holes in the wire.

That's a good situation where you're justified replacing it.Now the replacement cord that we have here today is a molded design. What that means is that our connector is molded onto the cable end to help prevent moisture from getting inside. We have a total length of eight foot of wire to go to our junction box or our unions where our wires will meet the rest of the wiring on our trailer.This is an ideal replacement for broken, damaged, worn out, frayed connectors for your trailer. This will work with fifth wheel trailers, gooseneck trailers. Any trailer out there with a seven way connector, this will work for it.

This seven way connector is available in various different sizes to fit your needs or your application. It's super easy to plug in. Just line up the tab on the top of it, and slide it into your seven way on the back of your vehicle.Here's what it looks like installed in conjunction with a junction box. A junction box makes it easier for you to add replacement lights down the road, or to add additional lights or other features to your vehicle or trailer that can work off of your seven way connector. Now that we've gone over some features of our Mighty Cord seven way connector, we'll show you how to get it installed.

We're going to cut off our existing seven way wire past all the damaged section, making sure we leave enough slack in it to reuse our junction box.You want to make sure that you have your batteries disconnected on your trailer at this time if you have any. This is the junction box we're using. We're going to take our cord, measure a little bit less than the full length of it, and we will cut off the outer sheathing. Okay, once we have it cut all the way through, we can pull back the sheath, exposing our wires inside.Now, we'll open up our junction box. Now inside the junction box, you can see it's labeled with the corresponding colors.

You have your white, your black, your yellow, your red, green, brown and blue and the corresponding functions which are correct in most applications. But because we're just using this to combine our old seven way wiring with the new seven way connector, we'll just match them up by color.Now we'll take one of our grommets that comes with the junction box. Slide our wires through it. Make sure the sheathing goes inside of it. Take our junction box now, take out one of the knock outs, slide the grommet into that hole. Okay, now we'll secure the wire with a clamp and our provided screws and we'll tighten these down so the wire can't be pulled out. On our replacement seven way, I went ahead and cut off some more of the sheathing. I'll slide another one of those grommets over the wires and down onto the sheathing itself. We'll go through another hole and we'll clamp it in place just like we did the other one. Now I'll pull back and make sure it's secure.Now we can start stripping back our wires, cutting them to length, and matching up with the corresponding colors. We'll start with our blue ones first. We'll strip back some insulation from both blue wires and on each blue wire we will attach some small yellow ring terminals which we have available on our website, clamp them in place. Slide them over the stud for our blue terminal. Place on one of our star washers followed by a nut, and we'll tighten that down.We'll continue this process for all of our colored wires, matching them up color to color. All right, with them all secured and matched up properly, we now have a proper electrical connection and if we need to add any accessories later to our trailer such as extra lights, we can easily do it inside of our junction box.With all of our connections made, we'll put the cover on, resecure the screws and now we're going to mount our junction box up next to this other electrical box in our king pin box. We'll be using a couple self tapping screws to secure this. Just like that, with our screws installed, our junction box is secure, and is readily accessible in case you need to make any repairs or add any electrical accessories such as additional lights.Now that we have everything installed, we'll take our new plug and we'll plug it into a seven way in the back of a truck the test out all of our functions to make sure everything is working correctly. Okay, we'll start by turning our headlights on. See our taillight running lights are working properly. Do a left turn signal. That works. Right turn signal. That works. Step on the brakes. Those are working. While we're stepping on the brakes, we'll make sure our turn signals work correctly.That's all good. Everything is working properly. That completes our look at and showing you how to install the Mighty Cord Seven way RV style trailer connector, part number A10-7W8.

Customer Reviews

Mighty Cord 7-Way RV-Style Trailer Connector w/ Molded Cable - Trailer End - 8' Long - A10-7W8

Average Customer Rating:  4.9 out of 5 stars   (22 Customer Reviews)

This molded, 7-way, RV-style, trailer-end connector allows you to connect your trailer to your vehicle. Durable molded rubber construction and corrosion-resistant terminals withstand the elements.

- A10-7W8

When you’re up there and it still working flawlessly 688225

One year later, Still working great
Austin B - 08/18/2020


- A10-7W8

Highly recommended excellent product 453493

- A10-7W8

I ordered a 7-way trailer wire for my camper to replace a damaged one. Easy installation and worked as if it was factory installed. Very pleased with this product and etrailer.com 652249

- A10-7W8

Works fine and seems to be made well. Have to push hard on the plug to seat it on the connector for the cap plug latch to engage the plug body. 629454

I purchased this item to provide charging for the boat battery while the boat is towed. No issues with the item currently.
Phillip G - 04/18/2020


- A10-7W8

Just what I wanted. 268266

Still working great. 19 thousand miles on trailer since installed.
Dennis - 07/05/2017


- A10-7W8
by: 09/29/2020

One year of use, and it works great with no issues at all. Nice and beefy, and the connection to the vehicle is really solid. No complaints at all. 894389

- A10-7W8

Cable recd today without any labels, paperwork, or schematic detailing what the normal wiring represents. All was not lost as I searched etrailer.com & found wiring instructions for detailed usage. Cable, wiring, & connector all of good quality. 810067

- A10-7W8

5 star product with 5 star customer ser vice! 776064

- A10-7W8

Excellent 7 wire plug. Repair went very well. 768374

- A10-7W8

Quality heavy duty molded cord. Easy to install. Had to replace previous cord that dragged on highway. Order shipped immediately and arrived well packaged. 708094

- A10-7W8

I used this connector harness to add electric brakes to my trailer. With the color coded wires, it was an easy task to connect everything up. The socket connects up to the 7 way factory connector on my F150 pickup. I recommend this connector harness for similar applications. 674330

This is a very durable connector and has served me well over the last year.
TomD - 07/24/2020


- A10-7W8

I usually dont do product review but thought I would give a shout out to an outstanding company. George and the team have delivered everytime I've ordered from them. Excellent service. Will continue to order from this great company. 647967

- A10-7W8

Excellent customer service and ease of ordering. Lori B. is very helpful when we had issues and provides exceptional customer service. 644125

- A10-7W8

This worked very well to replace my plug and wire that was dragged down the road accidentally. The cord is sturdy and flexible. It installed easily. After 1 year it is still working great. Be sure to use dielectric grease on the contacts. 641077

- A10-7W8

Excellent customer service. Ease of doing business. 614099

- A10-7W8

high-quality products, exactly as advertised and at a good price. Received the items in a timely fashion. Will definitely use them again 609637

- A10-7W8

Exactly what I was looking for at a surprisingly low price. 595286

- A10-7W8

excellent product great company to do business with i recommend e trailer to everyone 583969

- A10-7W8

Exactly what I needed. Insytalled with no problems. 516994

- A10-7W8

Boy did I order longer then needed. worked good. 504827

- A10-7W8

I'm restoring a1963 shasta astroflyte. The product had heavier gauge wire then I through it would have. Received the item fast 481204

- A10-7W8

Worked perfectly after I had shredded my original. (Here's a tip...don't let the cable drag while towing :) )Quickly installed using existing wire nuts. 30 minutes start to finish. The plug end seems like it doesn't lock in quite as securely to the truck socket as my original did. Time will tell 405657


Ask the Experts about this Mighty Cord Wiring

  • Wiring the Traditional Trailer 7-Way to 7-Way RV Standard
    The Mighty Cord 7-Way RV-Style Trailer Connector, # A10-7W8, will have the same wiring configuration as the Hopkins 7-Way Molded Trailer Wire Connector, # H20046. I recommend the Epicord 7-Way Molded Trailer Plug with Junction Box , # 277-000141. The junction box will allow to easily connect your trailer wiring to the new 7-way cord. Using 7 of the Ring Terminal - 12-10 Gauge Wire, # 44-5310A, you can connect your trailer wiring to the junction box. The box can attach to the trailer...
    view full answer...
  • Recommended Trailer Side 8 Foot Long 7-Way Harness with SAE Listing
    I reached out to my contact at Mighty Cord and she stated that they don't have any particular safety listings for their 8 Foot 7-Way # A10-7W8. For an 8 foot long trailer side 7-Way that meets SAE standards we do have the Hopkins # HM20041. I have attached a short video review on this product below that you can also check out.
    view full answer...
  • Parts Needed to Make 8 foot Long 7-Way Extension
    The part # 50-67-210 really would be considered more of an "umbilical" adapter between two 7-way sockets like what are used in flat towing. What you are in need of is more of an extension which would have a plug on one end and a socket on the other. You could cut off one of the plugs and then wire the harness to the # HM48480 and have more of a traditional extension. Or wire the # HM48480 to the # A10-7W8 instead.
    view full answer...

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Info for this part was:

Installed by:
Jeff D
Installed by:
Brent H
Video by:
Joshua S
Video Edited:
Chris R
Updated by:
Mary E
Updated by:
Halie H
Written by:
Amanda M

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