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Tired of draping your trailer’s power cord over the tailgate? The Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector makes life easier by bringing a 7-way connector straight into your truck bed. It plugs directly into your existing factory wiring, letting you retain the factory 7-pole on your bumper. With 7 feet of insulated wiring, it easily reaches from your rear bumper to the truck bed, providing a clean and professional look.
Say goodbye to complicated wiring setups! This custom wiring harness installs effortlessly without any cutting or splicing of wires. It's a straightforward, plug-and-play design that connects in line with your factory wiring. The included self-tapping screws and zip-ties secure everything neatly, making your setup as easy as plugging in and hitting the road.
The 7-foot, insulated wiring harness is not only designed for easy installation but also built to last. Its length provides flexibility for varied truck bed configurations, allowing you to find the most convenient spot for your 7-way connector. The wiring is insulated to withstand the elements, ensuring a reliable connection every time you hook up your trailer.
Maintain full functionality and convenience with this harness that lets you keep the bumper's factory 7-pole connection active. Whether you’re pulling a gooseneck or fifth wheel, or using a hitch-mounted accessory, you’ll always have the connection point you need without having to constantly switch setups.
Enjoy peace of mind with a wiring harness that's custom-fit for your vehicle, ensuring a perfect integration without any unnecessary adjustments. Specifically designed to match the configurations of multiple trucks, including models like the 2014 Ford F-250 and 2022 Ram, this harness simplifies installation while maintaining a sleek look.
Installing this wiring harness is a breeze, whether you choose the driver’s side or passenger’s side of your truck bed. The mounting flange dimension of 2-7/8 inches by 2-7/8 inches fits standard 7-way setups, making it simple to find a suitable location between the ribs in your truck bed. This thoughtful design feature reduces installation time and increases your time on the road.
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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.
Was a 30 minute install on my Ram 2500. It took longer to raise/lower the spare than anything else. Do yourself a favor and get the shorter one. You don’t need 7’, and I have at least 2’ coiled up.
The trailer wiring harness worked great. No problem with installation.
Greg 
2/26/2025
Great
Robin H.
2/26/2025
Connecting to the existing wire harness was straightforward and easy on the other-hand finding a place on the side wall wasn’t easy. I put the plug together and measured and could not find a place with enough space between the inner and outer sheet metal. Maybe there was but I didn’t want to chance it, did not want a hole I couldn’t use. i ended up putting it in the post behind the tail light. I used the round area in the tail light area as a guide (see pic). To get the wire up through from beneath the light I cut a small piece of metal to allow the wire access (see pic). I am very happy with the location where the plug will not be damaged.
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.
great 7 way extension, work well
Curt quality wiring harness. Straightforward installation. Highly recommend this product.
Wiring fit was fine but the 7 pin itself is too long. I mounted it right next to my factory 110v in the bed and since it’s so deep, it hit the inside of my bed when mounted (and made a dimple on the outside of the bed). Now the plate/face has to stick out 1/2 inch in the bed. Very frustrating.
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
Nicolas
4/15/2021
Has worked great
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.
Adam
7/5/2024
No issues with the harness after a year. Still wish they offered a shorter version though.
Solid product. Works as intended for.
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.
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!
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.
Very easy to install in 2003 F250
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.
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
Exactly what I needed-delivery was on time,as expected
This wiring harness worked and installed just like y’all said it would. It is great. The only thing I would have liked was ETRAILER to offer a plug that is compatible with the pre-drilled holes in newer trucks. The plug this harness came with left an empty space above the plug. I didn’t want to drill more holes in my truck bed so I had to find a compatible plug
Easy installation. Works great!
Products are amazing, but the customer service was even better! Stacey and Amy made the process so easy and I had all my products in a couple of days. Will definitely be buying from etrailer again.
Couldn't be any easier. This made my 5th wheel hitch install a breeze and impressed the wife! HAHA. Thanks again.
Just the part I needed.Clean and easy i nstall.
This has repeatedly worked perfect for us at Trailer Country, Inc. Thanks for
your service.
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James L.
4/16/2025
Working great. I put over 3500 miles towing with it since I bought it. Most of that was a trip up to Banff. If you havent been, you NEED to go.