To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
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.
Features:
Specs:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
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..
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
Great all in one kit, has everything I needed to get my trailer and truck on the road. Easy install!
Arrived in a timely matter. Was exactly what I ordered. Worked as it should.
As usual the ordering at etrailer.com was fast and easy. Shipment was fast and delivered on time. The 7way extension for gooseneck was as advertised. The toughest part of installation was feeding the end of the wiring harness through the post channel. Had one of these on my previous truck and missed it on my new truck. I recommend this product and etrailer.com
Gary
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.
looks like good quality haven't installed it yet but seems straight forward shipping was quick and came un damaged
Othe plug in the bed needed to be bigger to fit the factory hole
Great product! a 10 for sure.
The 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
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.
Functions perfectly, easy install, going strong for more than a year now.
Great 5th Wheel plug installed in right /rear of my 2024 Ram 3500 DRW long box pickup. Why pay $150 at the dealership when you can buy the same plug here for less than half.
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!
Wiring harness is awesome. Very easy install from start to finish. 1 hr max.
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.
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
Delivered ahead of schedule and easy in stallation
Install was easy. Not super impressed with the quality of the connectors. They dont lock together very well
Watching the install video before ordering made it so easy to be ready to install. Arrived this afternoon and installed it in under 30 minutes.
This was exactly what I was looking for, maybe 1hr start to finish. Thank you Etrailer.
Installed with bed liner in truck. Cut out for the rails.it took me all day to install by myself I took extra time for measurements. Drilling new holes and torquing bolts wasn't bad. I suggest having a helper to do the drilling and torquing. Great product. Would recommend.
Lazer S.
9/30/2025
Well the time you took to do the install paid off, Tommy. The install looks great! Is that a Demco Recon? What are you towing?
Installed without a fuss, customer is happy they don’t need an extension over the tailgate anymore!
Would have been an Easy install except when you have had your truck (2018 , 1 ton SRW) undercoated. It still, overall was an easy install, just took an extra 30 minutes. Coating was covering the bumper plug. I would recommend this product for a DIY. Transgender.
Greg
2/28/2026
This product has been excellent. Makes the hook up of lights so easy. No problems whatsoever. Pro hint: Use dielectric grease on all contact points.
This was a simple installation and works great.
Kate F.
2/2/2026
This install looks great too Larry! With all the money you saved installing it yourself, you deserve to treat yourself to a nice steak dinner!
Super easy install I took the extra step and dropped my spare tire just so that I can clean up the wires and support everything properly. Ordered a second one for my other truck!
Product was easy to install and is working perfectly, had called b4 ordering to be certain my concerns would be addressed, product was as described.
Gwendolyn Y.
7/22/2025
Thanks for all the photos, Aldine, they're all great shots! I'm happy to hear that the install was easy for ya. Are you going to be hauling a 5th wheel or a gooseneck with your truck?
Aldine
7/26/2026
still working great
Jerred H.
8/10/2026
This worked perfect, I made the mistake of buying the Amazon $26 version, I mean what could go wrong, right? It was junk, parts didn't lock together, Pin's were not long enough to make contact and wires were in the wrong spot. Returned that nightmare. This one fits perfect, it evan has a rub protector at the 90 degree where it plugs in at the hitch receiver. You know how when you open something of quality you can just tell, the feel, the weight. Thats how this was, the Amazon one felt cheep. This one you could just tell it was quality. I know in the middle of nowhere in the middle of the night i'm not going to ever have to worry about this.
Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Nicolas
4/15/2021
Has worked great