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  1. Custom Fit Vehicle Wiring
  2. Mighty Cord
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 7 Round - Blade
  6. No Converter
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
Our Price: $48.98
Custom Fit Vehicle Wiring
Orders above $99 qualify for Free Shipping
Shipping Weight: 2 lbs
In Stock
Mighty Cord 7-Way RV Style Trailer Connector w/ Molded Cable - Trailer End - 8' Long No Converter A10-7W8
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Replace the 7-way, blade-style connector on your trailer with this plug and lead to sync the brake lights and turn signals. Cable hardwires to your existing trailer wiring. Curved grips make it easy to disconnect from your vehicle's 7-way socket. 1-800-940-8924 to order Mighty Cord custom fit vehicle wiring part number A10-7W8 or order online at Free expert support on all Mighty Cord products. Great prices and Fastest Shipping for Mighty Cord 7-Way RV Style Trailer Connector w/ Molded Cable - Trailer End - 8' Long. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (41)
  • Q & A (0)
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  • Why etrailer?

Mighty Cord Custom Fit Vehicle Wiring - A10-7W8

  • Custom Fit
  • Trailer Hitch Wiring
  • 7 Round - Blade
  • No Converter
  • Mighty Cord
  • 8 Feet Long

Replace the 7-way, blade-style connector on your trailer with this plug and lead to sync the brake lights and turn signals. Cable hardwires to your existing trailer wiring. Curved grips make it easy to disconnect from your vehicle's 7-way socket.


  • 7-Way, blade-style connector hardwires to your trailer and plugs into the 7-way on your vehicle
    • Syncs your trailer's brake lights and turn signals with your tow vehicle's
  • Curved finger tabs allow for simple disconnect
  • Molded PVC housing with rubber sheathing protects the terminals and wires from moisture and debris


  • Harness length: 8'
  • Wire gauge:
    • Brown, red, yellow, and green: 14 AWG
    • Blue: 12 AWG
    • Black and white: 10 AWG
  • Wiring configuration:
    • Brown: passenger side brakes/turn signal
    • Red: driver side brakes/turn signal
    • Green: tail lights
    • Yellow: auxiliary/reverse lights
    • Blue: electric brakes
    • Black: 12V battery charge
    • White: ground
  • 1-Year warranty

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

California residents: click here

Customer Satisfaction Score:

Customer Reviews

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

Average Customer Rating:  4.8 out of 5 stars   (41 Customer Reviews)

Replace the 7-way, blade-style connector on your trailer with this plug and lead to sync the brake lights and turn signals. Cable hardwires to your existing trailer wiring. Curved grips make it easy to disconnect from your vehicle's 7-way socket.


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.

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


The Mighty Cord 7-Way RV Style Trailer Connector w/ Molded Cable was spot on! After perusing through numerous websites and [online vendor] looking for this very specific cable and molded connector with 10,12, and 14 gauge wires, I was finally directed to Valterra which actually showed the product on their website. But they do not sell the product. The gal who I talked to told me to go to and Bingo I found what I needed. Shipping was fairly quick and after comparing the wires on the existing cable to Mighty Cord the gauges and colors match--making splicing a breeze!


Easy to install the connectors are smaller than original and hard to push in but will get easier with more use.. overall a good replacement


Exactly what I needed and fast shipping. Great replacement for my OEM pigtail.


Contacts corroded worse than anything I have ever seen in my life after one dip in the ocean. Might be acceptable for fresh water but it's definitely not ok for saltwater use.

My recommendation to best protect trailer wiring from salt water is to use split loom, spiral wrap or braided sleeving to protect your trailers wiring. Use heat-shrink tubing - the kind with the melting inner wall - or liquid electrical tape. On incandescent-bulb sockets, use dielectric grease to protect against water and eventual corrosion. We offer wire loom, heat shrink tubing, liquid electrical tape part # SWC50122
Liquid Electrical Tape
, and dielectric grease part # 11755
Dielectric Grease for Electrical Connectors, 2 oz.
-- Etrailer Expert Jenny N - 02/20/2022


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

1 year later the cord has been subjected to all types of weather & along with road debrisfrom our motorhome. The cord still looks new. No damage to insukation or connectors. Thanks for delivering a lasting product.
Denver S - 06/10/2021


I wish the product was here to review but it was never delivered. Neither the past office nor the neighbors know anything so i guess i’m out of luck


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.


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


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.

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


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


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


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.


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.


Great service, order received promptly. Linda H has very good customer service skills.


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


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


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


When you’re up there and it still working flawlessly

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


Excellent 7 wire plug. Repair went very well.


Just what I wanted.

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


Excellent customer service. Ease of doing business.


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


Highly recommended excellent product


Show More Reviews

See what our Experts say about this Mighty Cord Custom Fit Vehicle Wiring

  • Can the Mighty Cord 7-Way RV Style Trailer Connector Be Trimmed
    Yes, you can trim the Mighty Cord 7-Way RV Style Trailer Connector part # A10-7W8 down to your specific length. If you have a set of heavy duty snips you can simply cut the cord at once but if not you'll need to use a razor to remove a section of the jacket and then snip each wire individually.
    view full answer...
  • How Is the Mighty Cord 7-Way RV Style Trailer Connector w/ Molded Cable Pinned
    In regards to replacing a trailer connector on a trailer with an option like the Mighty Cord 7-Way RV Style Trailer Connector w/ Molded Cable part # A10-7W8, you need to match wires by function not color. In other words, if there is a green wire on the trailer, you should apply power to that wire to see what light it activates. Then attach this wire to the trailer connector based on the function of the light and how it matches up with the diagram for the trailer connector attached below....
    view full answer...
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  • Wire Missing For 7-Way Trailer Side Connector
    I have attached the wiring diagrams for the different 7-way connectors used on trailers. I find it best to not reference wiring by color but instead function since depending on who made the wiring harness and who wired the trailer they can vary. As the white wire is typical of a ground connection the person who wired the trailer the first time may have not used it hoping that the ball connection would provide the ground that they needed to the vehicle. You may need to replace the 7-way...
    view full answer...
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  • 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...
  • How To Wire A Trailer To Connect To The Tow Vehicle Electrical System
    When wiring up your trailer you'll want to install a junction box # e99009 to have a nice organized place for your wiring connections. The 7-way cable # A10-7W8 will go from the junction box and connect to the 7-pole socket on your tow vehicle. Each wire is labeled in the wiring diagram for the cable and will go to the corresponding posts in the junction box. From the junction box you'll then run the wires to you battery and other corresponding components. I've attached a video below...
    view full answer...
  • 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 etrailer 7-Way Molded Trailer Plug with Junction Box , # e99011. 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 and house...
    view full answer...
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Info for this part was:

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

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