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Mighty Cord Trailer Connector Adapter - 4-Way Flat to 7-Way RV Style - 12" Long
(154 reviews)
Price: $21.96
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Mighty Cord Trailer Connector Adapter - 4-Way Flat to 7-Way RV Style - 12" Long
Part Number: A10-7084VP
In Stock
$21.96
Retail:$40.19
You Save: 45%
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- Reviews (154)
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Mighty Cord Custom Fit Vehicle Wiring - A10-7084VP
- 4 Flat to 7 Blade
- Universal Fit
- Wiring Adapters
- Plug and Lead
- Mighty Cord
Convert your vehicle's 4-way to a 7-way with this wiring adapter. Flat, 4-pole connector plugs into your vehicle and additional wire leads pull 12V power for accessories and send signals for the electric brakes and auxiliary or reverse.
Features:
- Adapter converts the 4-way flat trailer connector on your vehicle to a 7-way RV-style connector
- 4-Way flat trailer end plugs into the 4-way flat on your vehicle
- 7-Way RV-style connector plugs into the 7-way on your trailer
- Additional wire leads for 12V power, electric brake function, and auxiliary or reverse function
- Blue wire connects to your brake controller to send braking signal to your trailer's electric brakes
- Black wire pulls 12V power from your vehicle's battery to help maintain the trailer battery or power accessories
- Yellow wire sends the signal to your trailer to activate the reverse light or an auxiliary circuit
- Spring-loaded dust cover protects the 6-way connector from moisture and debris
Specs:
- Harness length: 12"
- Wiring configuration:
- Green (4-way): passenger side brakes/turn signal
- Yellow (4-way): driver side brakes/turn signal
- Brown (4-way): tail lights
- Blue: electric brakes
- Black: battery
- Yellow: 12V power supply or auxiliary
- White: ground
- 1-Year warranty
A10-7084VP Mighty Cord 4-Pole to 7-Pole Adapter Plug - 12" Harness
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
- Wrong item was ordered
- Did not arrive in time
- etrailer mistake
Ratings & Reviews
4.6
154 reviews
by:
Christopher
10/09/2025
Super cheap and who sells a trailer wire connector that doesn’t have a mount for it? Must be a scam so you have to order a special mount to put it on.
by:
John
05/06/2025
Knowledgeable salesman, the best of the best.
by:
Brandon
03/18/2026
I don’t have an issue with the item and it was shipped quick, delivered quick. I never received a tracking number.
by:
Kjell
07/06/2026
Adapter worked a
by:
Eric
11/30/2019
Plug and play! Very easy to install on our Santa Fe. Works as described, and has performed well for one year so far.
by:
Jennifer L.
07/22/2016
I ordered this product for my 97 Chevy 1500 Pickup. I use it to haul a two horse trailer made in 2007 with new plug adapter. I am female and know absolutely nothing about vehicle/trailer wiring. Hooked it up, everything worked great. Did not have to change a thing. The 97 Chevy is my farm truck and is not used very often. Did not have to touch a thing, plugged right in and went on down the road. Fast shipping.
Jennifer L.
7/24/2017
Still works great!
by:
Stephen
09/12/2021
The 4-pin to 7-pin adapter doesn't work. I'll have to fix the wiring. None of the trailer lights work. The ground in the 4-way cable was clipped. The outside ground wire was the only one connected - not what I wanted/needed. I had to replace the flat 4-wire connector to get the wiring I wanted. I expexlpected a flat 4-wire connector to round connector adapter. That isn’t what was delivered.
Heather A.
10/12/2021
This adapter is designed to make it easier to hardwire a 7-way plug with all of the functions on your vehicle if you already have the 4-pole flat. If you only needed the 4-pole flat functions, you can simply ground the white wire and tuck the other wires away.
by:
Donald
01/18/2021
A very nice, high quality, well-made product, except when I had trouble with lights working, I traced the white ground wire from the 4-pin flat plug, inside the plastics wire wrap, and discovered that it stopped half way inside the wrap — it was not connected to the ground in the round 7-pin plug. It relied on the separate white grounding pigtail to the 7-pin round for the ground.
I spliced the White from the 4-pin flat plug, into the white pigtail to the 7-pin round, sealed and rewrapped it, and now I have continuous ground between the flat 4 and the round 7. Now I have plug-in ground from 4 to 7.
I spliced the White from the 4-pin flat plug, into the white pigtail to the 7-pin round, sealed and rewrapped it, and now I have continuous ground between the flat 4 and the round 7. Now I have plug-in ground from 4 to 7.
by:
Tomr
11/10/2019
For this adapter to work, for me, I had to disassemble the plug and connect the "Flat Four" ground to the 7 pin plug. Logically if you have a flat four plug you are not going to be running trailer brakes and don't need the hard ground. As it was sold the lights don't work, which is all I needed. My connector runs direct to my truck harness. I don't leave this adapter connected. When I tow the trailer, in question, I plug in the hitch, this harness adapter and go. When done I unplug the harness adapter, the hitch, and throw them back in the truck.
by:
William
06/01/2019
Made converting my 2011 pathfinder from 4 flat to 7 round very easy.
The one I ordered was delayed, and they gave me a substitute that was even cheaper.
Great company.
The one I ordered was delayed, and they gave me a substitute that was even cheaper.
Great company.
William
6/1/2020
No issues at all. Everything still good
by:
Mike
06/01/2019
Great product, awesome price!
This adapter allows me to use my 18ft utility trailer with my 4Runner with light loads so I do not have to get out my big truck, which saves me alot of hassle!
The 4Runner has a 4 flat connector and my trailer has the 7 round...perfect marriage of utility and convenience!
I deducted one star only because there are no diagrams for the extra four wires. (B+, Brakes, Aux and Ground) Granted, it easy enough to ring out with a multi meter and I will not even be using them...however, they should still be identified either on the wiring or package labelling.
Still, fantastic solution and under $20!
This adapter allows me to use my 18ft utility trailer with my 4Runner with light loads so I do not have to get out my big truck, which saves me alot of hassle!
The 4Runner has a 4 flat connector and my trailer has the 7 round...perfect marriage of utility and convenience!
I deducted one star only because there are no diagrams for the extra four wires. (B+, Brakes, Aux and Ground) Granted, it easy enough to ring out with a multi meter and I will not even be using them...however, they should still be identified either on the wiring or package labelling.
Still, fantastic solution and under $20!
by:
Bill K
03/23/2018
I boat a boat that came with a trailer that had the 7 way round trailer plug, which of course doesn't work with my 4-way flat plug on my Jeep that I use with my other boat. So, I went by the big [trailer rental] store in town to buy an adapter. However they only had adapters that assumed the round plug was on your vehicle and the 4-way flat was on the trailer and I had the exact opposite problem. So, I went to [big online retailer] where I usually can find most anything and they didn't have an adapter either.
A Google search found etrailer.com and they had exactly what I needed. I ordered it and had it a few days later. I was a little apprehensive when I hooked it all up, but it works flawlessly! Now I can easily hookup either boat and I avoided having a second connection installed or modifying one of the trailer plugs. I'm very satisfied with a solution that cost much less than either of my alternatives!
A Google search found etrailer.com and they had exactly what I needed. I ordered it and had it a few days later. I was a little apprehensive when I hooked it all up, but it works flawlessly! Now I can easily hookup either boat and I avoided having a second connection installed or modifying one of the trailer plugs. I'm very satisfied with a solution that cost much less than either of my alternatives!
by:
Walter
03/16/2018
I have installed the connector on my Cadillac XT5. I had the 4 plug connector already installed with a blue wire for un-locking the solonoid on the brakes then I installed all wires to match the colors of the 5 & 7 pole. I cut out a hole in the plastic bumper cover and installed the connector with four screws.
You could make a new product like this one for the Cadillac XT5 connectors for all boat trailers, this is an easy hook up to the XT5, SRX, and other GM cars. I now use the round type 5-7 pole connector for my boat trailer to lock out the brakes when backing up my trailer.
You could make a new product like this one for the Cadillac XT5 connectors for all boat trailers, this is an easy hook up to the XT5, SRX, and other GM cars. I now use the round type 5-7 pole connector for my boat trailer to lock out the brakes when backing up my trailer.
by:
John H.
07/14/2018
I think this will work nicely for what I have in mind. My plan is to relocate my car hauler from my home in Arizona to my home in California. The trailer weighs in at 2,000 pounds and my 2010 explorer has a tow rating of 3,500 pounds. The car hauler has electric trailer brakes on it that I will not need when I haul it empty. So I bought this adapter which will allow me to use all the light functions without the trailer brakes. This will save on fuel costs for the big truck to stay at home this time. Thank you for all you do!
by:
Mike
08/06/2025
Great quality product, but it turns out I don't need it, how do I submit a return request?
Brooke M.
8/7/2025
Hey Mike! No worries. Let me make sure this gets started for you :)
by:
Steve
07/12/2019
I can always find the products I need, at the best prices, on etrailer.com. The items I purchased were shipped the same day, I promptly received emails about order status and tracking, and the items always arrived on-time, quickly, and in great condition (even the hitch). Etrailer is now the first place I go to look for towing equipment.
by:
M. Ted
07/31/2019
In this day and age of scams, baseless promises, and much less than quality products and misleading web sites boasting of claims never realized, it has been an extreme pleasure doing business with etrailer. The Mighty Cord Trailer Connector Adapter was exactly what was displayed on the web site and the quality of the connector was "top of the line". Shipping was just as stated and efficiently shipped at a very reasonable cost. To say the least I am very pleased with etrailer service and their products. I highly recommend doing business with this firm. Ted Johnson
by:
John T
08/22/2018
The Website is very easy to use. Looking up what you need is difficult on any site because you have to enter the correct description of what you need. I appreciate the quality of the products. I really appreciate the descriptions and help videos. Everything I need in one site. The pricing is very competitive and shipping is fair. With this connector I can add the brake controller with ease. Thank You!
by:
Greg
10/05/2016
I have an older truck with simpler connector and no trailer brake controls, and a newer truck for the robust brake connector. After extensive internet searching for an adapter, I again came to etrailer.com and ordered/received a robust part that works great.
by:
Randy
06/26/2018
Lighting harness has worked perfectly and the installation video specific to my vehicle was top notch. etrailer is great at what they do and provide!
by:
Dean E.
05/20/2019
I choose this particular cover because here in Iowa we have every kind of weather - sunny & hot, rainy & humid, cold & snowy, and usually windy. The Adco tyvek cover has done well so far on my Aliner hardside popup, as it breathes well enough that the camper has always stayed dry inside. I project 3 years use before replacement, and will replace with same model.
by:
Walter
09/14/2018
Product arrived via snail mail. Product did not work upon arrival. After examination determined the ground wire was not connected at the factory. Once wire was stripped and properly connected it did work. Poor quality control at the factory.
by:
Gary
12/15/2017
Great product fast shipping high quality thanks so much
Gary R.
12/16/2018
The cord has worked great it extends the reach of our rv power cord and allows us to park further away from the power source.
by:
Phil B.
06/15/2022
Great product - super easy to install and has worked perfectly for over a year - recommended! etrailer has great service and the best prices around on this stuff - my go-to for trailer parts.
by:
Vince D
08/14/2017
As always etrailer delivered a high quality adapter plug for my tent trailer which I will be pulling with my sienna. It appears to be high quality and arrived in a timely manner. Thank you.
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See what our Experts say about this Mighty Cord Custom Fit Vehicle Wiring
- Parts Needed To Add 7-Way To 2015 Honda CR-VHello Ginny, thanks for reaching out. It sounds like you are trying to add a 7-way trailer plug to your 2015 Honda CR-V. We do have the parts needed for this. The # A10-7084VP technically could be used for this, but there would be several other parts necessary to make it work. If you wish to add a fully-functional 7-way along with a 12v power pin, here are the parts you will need: - Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56158 - Universal Installation...
view full answer... - Wiring for Curt Echo Mobile Wireless Brake Controller and Adding Electric Brakes to a TrailerThe Curt Echo Brake Controller part # C51180 is a great choice because of its convenient and simple installation. The 7-way connector that you mention part # A10-7084VP pugs into the 4-way connector you purchased part # C56217. The white wire from the 7-way plug needs to be grounded to a clean bare metal surface on the vehicle's frame. You are correct, the black wire from the 7-way connector needs to be extended from the plug into the engine cavity and to a 40 amp circuit part # 9510...
view full answer... - Parts Needed to Tow Trailer with Electric Brakes with Semi TruckThe Hayes air actuated electric brake controller part # HA100400C that you referenced is a component you will need as this can convert the air brake intensity of your tow vehicle to electric current for your trailer's brakes. You will need a 7-way that you'll wire to your current trailer brakes like the # A10-7084VP but the semi truck taillight wiring has the turn signals and stoplights on separate circuits so you would need a converter to combine them to match your trailer wiring. For...
view full answer... - How to Mount 7 Way to 2019 Subaru Outback With Hidden Cross Tube HitchI understand the frustration, manufacturers are making hitches more hidden and sleek. It's nice having the cross bar hidden, but it does make it challenging to mount wiring because that's the traditional spot. You can route the 4 pole wire out to the bumper through a grommet that is under the spare tire. I have done that many times to get the wires out towards the hitch, you'll just want to make sure the wire is protected and to seal the grommet up with some silicone # LT37467. You can...
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- Can 4-Way be Spliced Into Trailer That Has 7-WayIf you don't want to use a vehicle adapter like the Mighty Cord Trailer Connector Adapter - 4-Way Flat to 7-Way RV Style # A10-7084VP on your vehicle with a 4-way to adapt it to your trailer's 7-way, then yes, you can splice into your trailer's wiring to add a 4-way if your like. You can use the trailer side connector you mentioned, the Hopkins Endurance Easy-Pull Harness with 4-Pole Flat Trailer Connector # HM38136. To splice it you can connect your wires with the Deka Heat Shrink Butt...
view full answer... - Installation of Brake Controller on 2016 Ford ExplorerTo install a brake controller on your 2016 Ford Explorer, if you have the factory 4-flat you will need to hardwire the rest in. I am not certain which brake controller you have specifically but the black wire is generally the power wire and run to the positive post of your battery through a 20- or 30-amp circuit breaker, and you also want to connect the blue wire coming out of the brake controller to the brake wire and the red wire from your controller will be what you connect to the wire...
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- Recommended 7-Way Mounting To Hide Wiring ConnectionsFor the Mighty Cord Trailer Connector Adapter # A10-7084VP and your Curt # C13182 trailer hitch, I recommend the 6 and 7-Way Trailer Connector Mounting Box for Round or Square Tube Hitches # 18159 along with some simple zip ties like # 853-3194-02. This will allow you to keep the connections hidden and also keep the wiring on the back side of the hitch or tight under the frame.
view full answer... - Can a Vehicle with a 4-Way Tow a Trailer with a 7-Way Correct, a 4 to 7-way adapter will allow your friend to tow the trailer. The lights will function therefore making it legal to drive but the brakes would not be able to be engaged without a brake controller. The best and most cost effective solution would be to use part # A10-7084VP on the vehicle therefore no alterations will need to be made to the trailer or vehicle. Once you plug the male 4-way on the adapter into the female 4-way on the vehicle, there will be 4 wires remaining. The...
view full answer... - Recommended 7-Way to 4-Way Adapter Just for Trailer LightsIf you don't care about brakes all you need is the Mighty Cord Trailer Connector Adapter item # A10-7084VP. You would plug your Honda's 4-way into the adaptor's 4-way and then plug it into the 7-way of your trailer. The lights will function but nothing else will. You will want to tape up the extra wires or cut them off if you have no intention of ever using them. This is the simplest and least expensive way to do what you are wanting.
view full answer... - Wiring Mighty Cord 4-Way to 7-Way Adapter on Tow VehicleThe Mighty Cord Trailer Connector Adapter # A10-7084VP referenced in your question is exactly what you need to connect the 4-Way flat on your tow vehicle to the 7-Way on your trailer. After plugging the 4-Way on the adapter to the 4-Way on your vehicle, the only wire that NEEDS to go somewhere is the white ground wire, which you will securely attach to a bare metal surface on the vehicle's frame. The additional black, blue, and yellow wires can be simply taped off if you don't need them....
view full answer... - Is it Totally Necessary to Connect Ground Wire of Mighty Cord Trailer Connector AdapterThere is a ground wire that is present in just the 4-way section of the # A10-7084VP which will be for just the trailer wiring and an additional ground wire for the other three circuits if ever active. If at all possible I would recommend attaching the white ground wire as well but you should have no problem activating just the lighting without connecting it.
view full answer... - Comparing 4-Way to 7-Way Adapter and ETBC7L KitThe main difference is just what you said, the # A10-7084VP is only the adapter and the # ETBC7L includes the bracket, connectors, a circuit breaker, and 20 feet of wire. The other significant difference is the adapter included with # ETBC7L has a 4-way and a 7-way so you don't lose the existing 4-way on your vehicle which is important to some people. It's similar to part # C57672 which also includes the bracket but not the other parts of the # ETBC7L
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view full answer... - Can 7-Way to 4-Way Adapter A10-7084VP be Used for Just Trailer Light FunctionFor what you are looking to do the part # A10-7084VP will work just fine. You would plug your vehicle's 4-way into the adaptor's 4-way and then plug straight into the 7-way of your trailer and all of the trailer lights will function. You could tape up the extra wires as they aren't needed or you could cut them off.
view full answer... - Trailer 7-Way to Car 4-Way Adapter PlugYes, I have a solution for you. You can use the Curt # C57672 7-way to 4-way adapter. Your 4-way plugs into the back of it and wiring is included for additional connections. These are usually for trailers that have a 7-way plug but only need lighting. I have included a link to this product, and a link to a video that explains the connections and install. This product would be good for trailers that do not require a 12v charging line or electric trailer brakes. If you want to pull...
view full answer... - How to Add 7 Way Trailer Connector to Vehicle with 4 Way ConnectorI have a solution for you, but there is not a true adapter for a vehicle with a 4 way connector to adapt to a trailer's 7 way. You will need to install a 7 way connector to your tow vehicle using the existing 4 way connector and something like the Mighty Cord Trailer Connector Adapter - 4-Way Flat to 7-Way RV Style - 12" Long # A10-7084VP. You'll plug your vehicle's 4 way into the 4 way vehicle end on the Mighty Cord and then make connections for the remaining needed functions for your...
view full answer... - 7-Way Running Light Circuit Powered On With Lights Off on 2015 Kia SorentoThe diode should not have anything to do with it, and there are only a couple of possibilities I can think of. First things first, check the ground of the connector on your '15 Sorento; it is common that a bad or insufficient ground can cause the issue of one of the functions bleeding through and continuing to have power. Another potential issue is there may have been some corrosion on the 7-way of your Kia Sorento, and that corrosion bled to the inside of the 7-way on the running light...
view full answer... - Wiring In A Tekonsha Prodigy RF And Mighty Cord 4-To-7 Pin Adapter Hey Randy. You can install the Mighty Cord Trailer Connector Adapter # A10-7084VP and cap off the blue brake controller output wire with some electrical tape since the Prodigy RF will not be connecting to it. This system detects deceleration and activates the brakes accordingly and the remote gives you the ability to read errors and manually activate the brakes. The yellow wire on the # A10-7084VP can also be capped off with some electrical tape unless you need a reverse light signal....
view full answer... - How to Tow a Trailer with a 6/7-Way Trailer Connector on a 2016 Toyota HighlanderThe Mighty Cord Trailer Connector Adapter part # A10-7084VP would work for you if the trailer has a 7-way trailer connector. However, if it has a 6-way trailer connector like you mentioned then you would want to use the Mighty Cord Trailer Connector Adapter part # A10-6034VP instead. Please keep in mind that both 6 and 7-way trailer connectors are used for trailers with brakes. If your trailer has brakes then the better option for you would be the Universal Installation Kit for Trailer...
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John
5/7/2026
Shorting out cant fix