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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. Custom Fit
  4. Fifth Wheel and Gooseneck Wiring
  5. 7 Round - Blade
  6. 7 Feet Long
Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long

Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long

Item # C56070
Our Price: $78.95
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Custom Fit Vehicle Wiring

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Mount this 7-way, RV-style connector in your truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56070 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long. Custom Fit Vehicle Wiring reviews from real customers.
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CURT Custom Fit Vehicle Wiring - C56070

  • Custom Fit
  • Fifth Wheel and Gooseneck Wiring
  • 7 Round - Blade
  • CURT
  • 7 Feet Long

Mount this 7-way, RV-style connector in your truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole.


  • Provides 7-way, blade-style connector in your truck bed for hassle-free hookup of 5th-wheel and gooseneck trailers
    • Connector mounts in truck-bed sidewall, tailgate post or wheel well
  • Retains factory 7-pole trailer connector at rear of truck (if present)
  • Plugs into factory wiring - no cutting or splicing
    • 7' Long, insulated wiring harness reaches from rear bumper to truck bed
    • Requires that truck have factory tow package
  • Custom fit for your vehicle
  • Includes zip-ties and self-tapping screws for installation


  • Harness length: 7'
  • Limited 1-year warranty

56070 CURT Fifth Wheel and Gooseneck OEM Extension Harness - 7-Way RV Blade Plug - 7' Long

Compare to Bargman 54701-003

Installation Details C56070 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Video of Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long

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

Video Transcript for Curt 5th Wheel Wiring Harness Installation - 2021 Ram 2500

Hey everybody, Ryan here at etrailer. Today on our 2021 Ram 2500, we're gonna be showing you how to install the Curt 7-way Round in-bed Wiring Kit. But before we do that, why don't we check it out and make sure that this is something that's gonna work for you. When it comes to an in-bed Wiring Kit like this one here, it's one of those things that aren't absolutely necessary but it sure does make sense and becomes convenient whenever you have your Gooseneck or 5th Wheel trailer hooked up. And that's because the Wiring Connector for your lights and everything are just gonna plug right into there, right into the bed. That's going to allow you to not have to take that Wiring Connector, drape it over your tailgate and run it all the way down to your bumper.

So, you know, it's the right way to do things, honestly at the end of the day. When it comes to this one, it's really convenient. It just tease right in to the back of your factory 7-way and that's where it gets all of its signals and everything from. So because of that, not only are you able to still utilize and maintain the 7-way connector on your bumper, but you're also gonna be able to get the one here inside of your bed. So not really a whole lot to these, one thing I like to touch on is the quality.

It's definitely not out bad by any means. Everything feels solid, the wires are nice and thick. Everything else, if you like the cap, there's a a good spot for you to get your fingers under there easy. So even if it was cold out and you had some bigger gloves on or something, you could still grab it and work with it. And then on the bottom side, there's another catch here.

So you plug your trailer connector in, the spring loaded cap kind of sits down on it and that catch will help prevent your trailer wiring from becoming accidentally pulled out. So it's a little peace of mind there knowing that this isn't just gonna fall out and then you lose all your signals and everything. So when it really comes down to it, if you have a Gooseneck or a 5th-Wheel, the Wiring Connector here, this will kind of just complete that package and have everything set up the way it's supposed to be. As far as the installation goes, it is really straightforward. Shouldn't really take you a whole lot of time.

You do have to drill a hole inside of your bed there to pass that connector through so you will need a hole saw. And once that's done, you kind of just push a wire through there, plug in the connector, screw it in and plug it in down at your bumper. So it really isn't, really isn't too complicated. But if you'd like to see how that's done, feel free to hang around. We'll go ahead and do that together now. To begin our wiring installation, we're gonna be here up in the bed of the truck and we need to create an opening, that way we can mount our bar connector plug. So generally speaking, right here in this area is a really popular spot. It's out of the way, but it's still easy to get to. And so I've done just kinda held it up and then I put a little mark there where I wanna drill. With that said, look in behind the bed and make sure you have the space behind there. You obviously don't wanna drill through here and then keep going and drill out through the outside of your truck. But we have quite a bit of room here and so I think we'll be all right. With that said, I'm gonna take my hole saw and put this through that. So a lot of times these trucks will have this extra piece of paneling here. And obviously once you get the main hole cut out, we can come back and get this portion cut out as well. Once you have that hole completely created, just to help or protect this exposed bare metal from drilling, I'm gonna take a paint stick and just get a layer of paint over it. Spray paint will work too but I found in the past using these paint sticks just kind of ring set over spray, get on the side and speed things up a little bit. So that's what I'm gonna use. So now what we can do is grab our new harness and we're gonna take the end that has the T on it, the two connectors, feed the surge to the bottom side of the truck. A lot of times this can be tight so you kind of have to just figure out which way it goes in the best and go from there. So you can pop in there and then drop it all the way down. And this side here, what you're gonna do is plug the connector into it. I do suggest using some Dielectric Grease to coat the terminals. That'll help keep it protected from corrosion and things like that. Put a little bit on there and then simply just plug that right in. From there, we will just line this on up. Here it's where we want it, it's where it looks square and good, so that looks all right. So like that and then we'll use the provided soft tapping screws to secure the stone. Now underneath the vehicle, here's where our wiring comes down. If you wanna mention, I did temporarily just pull off our spare tire. Just makes it, gives us a lot more room to work but you don't have to, it's your choice. But with that said, I'm gonna run my wire over here and I'm just gonna loosely route everything now. Once I have it all plugged in, then we can come back and zip tie it up and everything else. But our T connector is gonna eventually connect to our bumper connector there. So we need to remove that, you can push down on that pen and pop it free. And then we can take our T connector and again down here too I'm gonna put some more Dielectric Grease, both ends of it. We're just gonna T this in. So one end is gonna plug in our factory connector there. The other side will plug into the actual plug on our bumper. Just use some of the included zip ties just to secure wiring up, tied against our back bumper, run it across. I had a couple, maybe two foot of extra wiring that I didn't really need. So I just bundle rolled up and secured it out of the way over here. And that'll finish up our look at and our insulation of the Curt 7-way Round in-bed Wiring Kit on our 2021 Ram 2500..

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Customer Reviews

Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long - C56070

Average Customer Rating:  4.8 out of 5 stars   (851 Customer Reviews)

Mount this 7-way, RV-style connector in your truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole.


2022 ram 3500 long bed. Was perfect length if you install it on the rear driver side of bed. In the video i saw of someone installing it they cut the hole then shoved the double connector end of the harness down from the bed. I found it easier to fish a string down the hole and then tie the string to the clip part of the single side of the harness and pull it up. That plug has to go through the hole straight or else it gets caught up and having the string tied to the clip helps pull it up and through the hole straight.


This order was for ITEM # C53CR which has the filler plate. The order somehow was changed or substituted for this part which works for the application but without the filler plate.
etrailer sent the filler plate separately and I performed the install which was fairly simple and with the plate installed looks completely like factory. I attached my camper to the bumper connector and all worked, I could not reach the bed connector due to cable length, this was set up for a new 5th Wheel we are purchasing. I am confident that is will work.
I used different wire ties, something a little more substantial than what was provided but that is my choice. Watch the install video, it is fairly straight forward, 30 minutes from start to finish for my install.
4 stars due to the confusion in the order but was eventually straightened away.


Great kit to add a trailer connector in the bed of your truck. Super easy to install, took 30 minutes start to finish.



Still works great to hook up my fifth wheel connector in the bed of the truck instead of having it hang over the tailgate.

2012 Ram 2500

Super fast install. Great product. I have a 21 Ram crew short bed and the 7’ is the way to go. 35 min install. Tested and works great. Instructions call for a 2-1/8 hole. I was able to use the 2” hole saw and remove and reinstall the grey plastic wire cover from the Y.

2015 GMC Sierra 2500

Product was delivered sooner than scheduled. Excellent customer service! My second time using etrailer with outstanding products, service, and results.


very easy to intall.the box it came in i was wondering if it was going to work the box was torn open


Super easy to install, plenty of wire to put the harness where ever you pretty much want in the bed. Quality wiring harness and connectors.



Plug and play, no cuttingsplicing wires. Highly recommended. Plenty of extra wire to put the plug where you want to in the bed. The trailer cord is held very securely in place. Installed on my 22 Ram 2500


Excellent service super fast shipping and just like the instructions say plug and play super clean look very satisfied with the product would buy again . Bought this for my son’s 2006 Ford F-350


Very easy to install. Works wonderful for plugging in fifthwheel so there is no wiring over tailgate. And still able to maintain oem plug.



Excellent product! It was a very easy install and works awesome with existing wiring.


Worth every penny. Quality is great and it’s a true plug and play. Have had it over a year and no problem. About a 10 minute install


I used this to tie-in my truck cap lights and power. I modified it with the connector for the truck cap. A year later still working great.

2016 Chevrolet Silverado 2500

Arrived today. Shipping was great and item makes for easy install for my 5th wheel RV.


Couldn't be any easier. This made my 5th wheel hitch install a breeze and impressed the wife! HAHA. Thanks again.

2017 Dodge Ram Pickup

Installed on 2017 Ram 2500 easy bolt on install,very well made, best part made in USA.

2017 Ram 2500

After a year and 8000 miles use the Curt wiring harness is working just like new. Seems very much like an OEM quality or better product.

2018 Chevrolet Silverado 2500

I like the replaceable connector end, and the 90 degree harness end that joins it, but 7' of wire for my application is about 3' too long. Extra wire just increases resistance. Would be nice if they made a 4' version.

2012 Ford F-350 Super Duty

Easy install. I would emphasize using a good high quality hole saw. Makes all the difference.

Ford F-150

It worked great,so good I took it off my truck I traded in and putting it on my 2022 f-150.I buy all my trailer and truck equipment from etrailer,good products and service! Fast shipping also!



Great,still working as it should.


Very easy to place an order. These people work hard to help you get it right. However, my package arrived empty. Packing tape was slit and box arrived with nothing in it. Within 2 hours of contacting, I had a new package being shipped. Before I could even email them pics of the empty box, my new replacement order had already arrived!
That's freaking customer service! They definitely remember who the customer is, and I will continue to use them every chance I get.


Installation was very easy and straightforward. It took about 10 minutes; once the spare tire was out. The hardest part was taking out and putting back in, the spare tire. If you have a 5th gen Ram that didn’t come with a gooseneck plug, there should be a plastic cover where it would be. Pop that out and your hole for the wiring is already there. There will be four small squares in the corner. The plug that is mounted to the firewall has enough clearance, so you can mount it to the bed using the provided self-tapping screws.

2017 Honda Insight

I purchased this unit after reading the reviews. I received both the C56070 and a B&W OEM hitch within a few days of placing my order. Etrailers’s customer service is excellent! The installation of this wiring harness took about twenty minutes including cutting the hole for mounting. Everything but the hole saw was included in the package! I am very pleased with my purchase!
Be sure to watch their installation videos prior to purchasing, they give real insight into the process!
The plug in is located in the bottom left corner of the photo!

2019 Dodge Ram Pickup

Great product! a 10 for sure.

7 foot cord was more than adequate. Good quality product. I installed on 2019 Ram 2500 Big Horn.
I will tell you dont even try the install without lowering the spare tire. Even if you are able to fish the wire over (like I did) you will not be able to make the connection to the existing 7 pinn on the bumper. the plug adapter is wired in such a way that you cannot get your hand and the wire in the right orientation. The install of the unit will be less than an hour and probably closer to 30 min.
One last tip, when reinstalling the spare be careful not to push the tire to far to the front there is a thin metal shroud that the tire will rub on and squeak over every little bump. test it before you are done, ask me how I know. LOL

2018 GMC Sierra 2500

Nice product. Very simple install. Requires 5 holes to be drilled. All plug-and-play design. Even comes with zip-ties to tie it all up.


Install was very easy, wish it would come with some of that gel you’re suppose to put inside of it. Just needs a little and no need to buy a whole big tube of it. Haven’t used it yet but was everything I needed for my Fords new gooseneck. Didn’t want to plug it in at bottom of bottom of bumper



Has worked great


This harness is excellent. It plugged right in and looks like it should last a while. It also included plenty of zip ties and the necessary mounting screws. The hardest part was mustering up the nerves to drill a 2-1/8” hole in the bed of your truck. After drilling the hole, I put touch up paint on the bare metal to prevent rust. I also put silicone sealant in the screw holes, after they were tapped, to seal the metal there too. Install was quick and easy with the right tools; just the hole saw and a drill driver with the appropriate socket for the mounting screws.

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