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Mighty Cord Trailer Connector Adapter - 4-Way Flat to 7-Way RV Style - 12" Harness

Mighty Cord Trailer Connector Adapter - 4-Way Flat to 7-Way RV Style - 12" Harness

Item # A10-7084VP
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Mighty Cord Wiring - A10-7084VP
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Convert your vehicle's 4-way flat trailer connector to a 7-way RV-style connector. Plug the 4-pole connector into your vehicle and connect the wire leads to get 12V power, electric brake function, and auxiliary or reverse function. Lowest Prices for the best wiring from Mighty Cord. Mighty Cord Trailer Connector Adapter - 4-Way Flat to 7-Way RV Style - 12" Harness part number A10-7084VP can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (68)
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Mighty Cord Wiring - A10-7084VP

  • Wiring Adapters
  • Single-Function Adapter
  • 7 Blade
  • Plug and Lead
  • Mighty Cord
  • 4 Flat
  • 0 - 5 Feet Long

Convert your vehicle's 4-way flat trailer connector to a 7-way RV-style connector. Plug the 4-pole connector into your vehicle and connect the wire leads to get 12V power, electric brake function, and auxiliary or reverse function.


Features:

  • Adapter converts your 4-way flat trailer connector to a 7-way RV-style connector
  • Additional wire leads for electric brakes, 12V power, and accessory wiring
  • Spring-loaded dust cover protects connector from the elements
  • Simple installation
    • Wiring harness plugs into existing 4-way flat connector and hardwires to existing wiring


Specs:

  • Harness length: 12"
  • Wire configuration:
    • Green (from 4-way): right turn signal and brakes
    • Yellow (from 4-way): left turn signal and brakes
    • Brown (from 4-way): tail lights
    • Blue wire: electric brake
    • Black wire: battery
    • Yellow wire: 12-volt power supply or auxiliary
    • White wire: ground wire


A10-7084VP Mighty Cord 4-Way to 7-Way Pre-Wire Adapter Harness - 12"




California residents: click here


Video of Mighty Cord Trailer Connector Adapter - 4-Way Flat to 7-Way RV Style - 12" Harness

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




Video Transcript for Mighty Cord Trailer Connector Adapter Installation - 2013 Thor ACE Motorhome

This motor home came stock with a four-pole flat, which is great for your lights and everything, and maybe a small trailer. But if you've got a motor home, chances are you'll be pulling your car with a flat tow set up. This four-pole, you can do it, but it's not really the optimal way to do it. We'll show you how to upgrade this to a seven-pole connector, which will makes things a lot better.Today, in this 2013 Thor Ace we're going to review and install the Mighty Cord trailer connector adapter. This is our connector from Mighty Cord here. It has a conventional seven-pole connector on the inside, very popular industry standard for many years.

Comes out back. It's going to adapt down to a four-pole connector, which will plug into your four-pole connector on your motor home.This is what the seven-pole looks like once installed in the back of our motor home. You can see it was a fit. We got it sitting up right below the bumper where it fits nice and looks like it's part of the original tow package.Now, a couple of things I want to point out. First off, the seven-way connector, it even says it on the lid.

Look inside. It's got the very common six blades and then the center pin. This is the industry standard to fit all kinds of seven-pole connectors from your trailer, like this one, even though a bit worn out.Quick look at the lid. So we've got plenty of room. It's spring-loaded to help keep it down into place and keep your connector from falling back out.This has a classic durable plastic construction so it lasts a very long time.

You don't have to worry about the metal galvanized versions that still end up rusting out on you. So this is a good match for your vehicle.Next, I'll go ahead and show you how to install it, plus a couple of extra pointers for extra circuits along the way.Now, our seven-pole connector is not going to hold itself up, so we need some extra parts. We'll need our no-drill long bracket here. This is actually clamped to our hitch to help hold it in place. Also, from Mighty Cord we also have a seven-pole connector that fits a wide variety of seven-pole connectors.As you can see, a little piece is already attached to it.

The only modification is I put a slight bend into it. So I put it up on my hitch. It comes down at an angle and clears the bottom of our bumper. Now, our bracket's held in place by a clamp. So it goes through the opening here and around our hitch. Make sure the screw is pointing down to the ground. Makes it a little bit easier to run it together. Push back up. This will engage the threads, and then we can tighten it down.Let's put our seven-bolt into place. We're going to just thread our wires through. We'll connect our lights here. Push them together. Now, I did put a light layer of dielectric grease on the pins here to help protect it because once we put it together, this'll be a semi-permanent connection. It's also a good idea to run a zip tie around it to make sure it doesn't ever come apart again. I'm going to simply run a zip tie between the wires here to keep everything steady. That'll be more than enough.Let's mount this up to our bracket here. Now, this does not come with the hardware. I wish it did, but it does not come with hardware to install it. Put a conventional pan head screw, flat washer, lock washer, and that will be more than adequate for the bracket here. With all our hardware in place, we'll just go ahead and snug them down.For our customer's application, we're not going to require the use of these two wires. So we're not going to worry about them, and we will be using the blue wire here. Now, since I'm making an electrical connection that's going to be outside of the vehicle and especially underneath, I'd like to use a regular heat-treated butt connector that'll seal everything out instead of these conventional ones that are on here. So I'll just go ahead and just cut it and replace it.The other two wires, this can be used, the black, for a trailer or a towed vehicle, for a duel power supply to charge a battery or run an accessory on a trailer. For the yellow wire, on a trailer side only, this is typically used for a reverse light or maybe an auxiliary circuit for some other reason on your towed vehicle.Now, our customer is going to be using the blue wire here for a notification system from his towed vehicle. We'll be using this circuit that's used in the factory tow package on the brake wire that goes up front underneath the dash.Now, we have to get underneath the motor home here and get access to the wiring that's on the passenger side of the frame. Here's a wire harness going towards the back. There's a big connector and a small connector. We want access to the bigger connector here. So this wire harness, we're going to follow it down.I took this apart earlier and actually found some labels for the wire harness here. I got lucky, and it says there used to be a flag here for brake output. So what I did is use another heat-treated butt connector and connect your 10-gauge wire, and I ran it down to my four-pole connector. This way you can run this signal all the way from the front to the back, and you don't have to worry about running an extra wire going up towards the front in the cab of your motor home.Here is the wire that I extended, and it's going right to our blue wire here. We'll apply some heat to it to shrink it up. The last hookup will be a white wire for ground, and that's going to go into some sheet metal right behind the bumper here. This place right behind the bumper will do just fine. So using a self-tapping screw . Once again, it doesn't come with those connectors; you have to supply that on your own. We'll run it in.All right, just about done. We'll tidy up our wires a little bit, kind of organize them, and we'll zip tie them into place. With everything connected, we'll go ahead and try it out. I've got a nice little tester for this, but you could also use your trailer or your towed vehicle for this.This inaudible 00:06:19 lights. First off, we'll do our running light circuit, left-turn signal, our right-turn signal, and we'll double check the brake signal. Now I've finished for the Mighty Cord trailer connector adapter on this 2013 Thor Ace.


Customer Reviews

Mighty Cord Trailer Connector Adapter - 4-Way Flat to 7-Way RV Style - 12" Harness - A10-7084VP

Average Customer Rating:  4.8 out of 5 stars   (68 Customer Reviews)

Convert your vehicle's 4-way flat trailer connector to a 7-way RV-style connector. Plug the 4-pole connector into your vehicle and connect the wire leads to get 12V power, electric brake function, and auxiliary or reverse function.

- A10-7084VP
by:

I have yet to use this product. Examining the product indicates that it is what I needed. The service of Emily was first rate. The delivery of my product exceeded my expectations-delivered in less than 24 hours. 385040



- A10-7084VP
by:

Great product fast shipping high quality thanks so much 460558


Comments
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.
Gary R - 12/16/2018

46778

- A10-7084VP
by:

Easy transaction and delivered as ordered! Fast delivery! Will definitely use etrailers again! 481149



- A10-7084VP
by: 08/05/2020

yeah products are great and work 855983



- A10-7084VP
by:

Product delivered very quickly. Exactly what I needed. 811421



- A10-7084VP
by:

Works like a charm. Easy breezy.. nothing to it. 809220



- A10-7084VP
by:

This worked & was just what was needed. The only problem was II needed 4 pin hook up & had to but con the other ground wire. After that it was spot on. 800653



- A10-7084VP
by:

Works as it’s suppose to! 794593



- A10-7084VP
by:

Product works great, 1 year later everything is still good. 761841



- A10-7084VP
by:

Perfect addition and still have the capabilities of both plugs. 754909



- A10-7084VP
by:

Plug and play! Very easy to install on our Santa Fe. Works as described, and has performed well for one year so far. 728476



- A10-7084VP
by:

Very Good 727478



- A10-7084VP
by:

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. 724970



- A10-7084VP
by:

Easy to install. After year full timing RV still working great 715211



- A10-7084VP
by:

Easy to put on. Still working. 715210



- A10-7084VP
by:

It works exactly as advertised. It is well made and simple to install and use. I am very happy with etrailer's products. 697126



- A10-7084VP
by:

Fast shipping . Good Products. Shipping a little high. But Item arrived on time Thanks 682546



- A10-7084VP
by:

Easy installation. Great product 680175



- A10-7084VP
by:

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 678978



- A10-7084VP
by:

Was just what we needed to finish our project! Works perfectly! 675476



- A10-7084VP
by:

The Mighty cord trailer connect adapter worked perfectly I was very happy! There were a few shipping problems which the staff at etrailer worked out for me I was well pleased. 671643



- A10-7084VP
by:

this is one of 3 plugs on my truck it works great 670991


Comments
I use it all the time
Johnny C - 07/18/2020

94426

- A10-7084VP
by:

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. 669232



- A10-7084VP
by:

Plugs right into my 4 way. Heavy wires to hook up your brake box. Nicely made. 666469



- A10-7084VP
by:

Very pleased! 661246


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Ask the Experts about this Mighty Cord Wiring

  • Is it Totally Necessary to Connect Ground Wire of Mighty Cord Trailer Connector Adapter
    There 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...
  • 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....
    view full answer...
  • Installation of Brake Controller on 2016 Ford Explorer
    To 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...
    view full answer...
  • Wiring Mighty Cord 4-Way to 7-Way Adapter on Tow Vehicle
    The 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...
  • How to Add 7-Way to 2018 Subaru Outback
    If you are looking to add a 7-way to your 2018 Subaru Outback in order to utilize a brake controller you will first need to install a 4-way with Wiring Harness with 4-Pole Flat Trailer Connector # 118467 (although there is not a fit for the Sport model of Outback). After adding the 4-way you will need to install the Universal Installation Kit for Trailer Brake Controller # ETBC7, which will give you the hardware you need to install a brake controller, including circuit breakers, wiring...
    view full answer...
  • Will Trailer Brakes Function By Adding 4-Pole to 7-Way Adapter A10-7084VP
    A wiring adapter such as the Mighty Cord 4-pole to 7-way # A10-7084VP will let you change the trailer connector format from one to the other but by itself it does not add the functionality of a trailer brake controller. To have trailer brake power you still need a brake controller unit. The adapter has three pigtail leads, yellow, blue and black, with butt connectors. These allow you to make the additional circuit connections for 12V auxiliary power, brake controller output and reverse...
    view full answer...
  • Recommended 7-Way Mounting To Hide Wiring Connections
    For 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...
  • How to Tow a Trailer with a 6/7-Way Trailer Connector on a 2016 Toyota Highlander
    The 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...
    view full answer...
  • Can 7-Way to 4-Way Adapter A10-7084VP be Used for Just Trailer Light Function
    For 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...
  • 7-Way Trailer Connector for a 1999 Ford Ranger and Battery Charger for a Camper Trailer
    It sounds to me like you are trying to attach a camper with a 7-way trailer connector to your 1999 Ford Ranger with a 4-way trailer connector. If this is the case then you would want to use Mighty Cord Trailer Connector Adapter part # A10-7084VP. However, if your trailer has brakes then you will need to install the Universal Installation Kit for Trailer Brake Controllers part # ETBC7 along with a trailer brake controller such as the Hopkins Agility Trailer Brake Controller part # HM47295. Both...
    view full answer...
  • Which Wire of Mighty Cord Trailer Connector Adapter # A10-7084VP Is for Charging Battery
    The black wire of the 7-way adapter part # A10-7084VP that you referenced is normally the circuit associated with charging a trailer battery. That said the yellow wire could be too as long as you wired up the trailer to match. From the adapter to your vehicle battery you will need to run 10 gauge wire like part # 10-1-1 (sold by the foot) through a breaker like part # 9510.
    view full answer...
  • 4-Way to 7-Way Adapter Recommendation for 2016 Jeep Wrangler Unlimited
    7-Way sockets are a bit bigger and heavier than 4-way sockets so they are mounted to the vehicle so that they don't sag. If the 4-way on your vehicle was longer than typical you could mount the 7-way of the adapter part # A10-7084VP to the trailer frame and have the 4-way portion reach accross. Otherwise mounting the # 37185 is your best option.
    view full answer...
  • Trailer 7-Way to Car 4-Way Adapter Plug
    Yes, 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...
  • Wiring for Curt Echo Mobile Wireless Brake Controller and Adding Electric Brakes to a Trailer
    The 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...
  • How to Mount 7 Way to 2019 Subaru Outback With Hidden Cross Tube Hitch
    I 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...
    view full answer...
  • Recommended 4-Way Trailer Wiring Harness for 2014 Honda Odyssey Touring with 7-Way Adapter
    For just the 4 way and the adapter for your 2014 Honda Odyssey Touring, I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56378 which will install behind the driver's side trim panel in the rear cargo area. You will install the 10-amp mini fuse and two 7.5-amp mini fuses in the rear fuse panel. I've attached the installation details to assist. Then for your 7-way plug with only the 4-way functions, you only need the Mighty Cord Trailer Connector...
    view full answer...
  • Recommended Parts to Add 7-Way Trailer Wiring to 2018 Toyota Highlander Hybrid
    For your 2018 Toyota Highlander, because you already have the 4-way trailer connector and don't want the brake controller wiring, you simply need to add the Mighty Cord Trailer Connector Adapter # A10-7084VP. Installing this adapter means connecting to your current 4-way and then connecting the white ground wire with the ring terminal to a bare metal connection to the frame or frame mounted panel. Then to add the 12V power, you will use wire # 10-1-1 sold by the foot and connect it...
    view full answer...
  • Comparing 4-Way to 7-Way Adapter and ETBC7L Kit
    The 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
    view full answer...
  • Can 4-Way be Spliced Into Trailer That Has 7-Way
    If 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...
    view full answer...
  • Converting a Trailer with 7-Way to Vehicle with 4-Way
    If the vehicle has a 7-way trailer connector and the trailer has a 4-way trailer connector then you can use the Pollak 7 Pole to 4 Way Connector Adapter part # PK12716 to attach them to one another. However, if the vehicle has a 4-way trailer connector and the trailer has a 7-way trailer connector then you can either use an adapter like the Mighty Cord Trailer Connector Adapter part # A10-7084VP or you can just cut off the 7-way on the trailer and install the Hopkins Endurance Quick-Fix...
    view full answer...

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Info for this part was:

Test Fit:
Joe V
Installed by:
Jeff D
Installed by:
David F
Expert Research:
Jameson C
Expert Research:
Adam R
Video by:
Dustin K
Video Edited:
Chris R
Updated by:
Mary E
Written by:
Amanda M

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