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Say goodbye to the hassle of cutting or splicing wires. The Hopkins Plug-In Simple Vehicle Wiring Harness is tailored to fit your vehicle's factory tow package, making installation a breeze. Just plug it into the OEM connectors, and you’re set—saving time and ensuring an exact fit. Perfect for those who value efficiency and professional-grade installation without the professional cost.
Switching trailers should be simple, and with this harness, it is. It offers both a 7-way RV-style and a 4-flat connector, allowing you to tow different trailers without additional adapters. Designed for flexible towing needs, this harness ensures you’re ready for any trailer setup.
Long journeys or rugged trails, your connectors are built to last. Featuring corrosion-resistant terminals, this wiring harness is equipped to withstand harsh conditions, ensuring reliable performance and long-term durability. Keep your towing connections safe and secure through any adventure.
Weatherproofing is critical when maintaining connections, and this harness does it right. Protected connection terminals and a handy dust cap safeguard your connectors from the elements, enhancing durability and ensuring consistent towing performance in rain or shine.
This harness is more than just functional—it's custom-fitted to integrate seamlessly with your vehicle’s existing tow package wiring. Engineered for specific vehicle models, it offers peace of mind knowing it was made to fit and designed to perform.
Electrical connections are crucial to safe towing. Every Hopkins Wiring Harness includes a terminal grease packet to prevent corrosion and maintain secure electrical connections, helping to ensure your trailer’s lights function accurately every time.
Worried about securing your connectors? The kit includes a sturdy mounting bracket, keeping your connectors organized and protected. With all necessary hardware included, you can focus on the journey ahead knowing your connections are in place.
California residents: click here
there was no way to use the mounting screws for the bracket to the bumper.
So I had to tap the holes in my bumper 1/4-20 and buy some 1/4-20 bolts
about 1/2" long. then I had to drill out the holes on the bracket so the
1/4-20 bolts would go thru.
Staff very friendly and knowledgeable. Super-fast shipping. Fits perfectly!
This was the perfect factory install for my 2022 Nissan Frontier. The quick connects match with the two plugs found at the rear frame rail. The factory ends have "dummy" ends that need to be removed first and spraying the top with a silicone spray may help with disconnecting. Be sure to use dielectric grease before connecting the 7-Way plug.
Brooke M.
4/14/2025
Thank you for sharing all your install tips! Those are super helpful for other readers who might come across this. :)
Worked out perfectly, thank you etrail er.
Victoria H.
4/14/2025
Thanks Timothy, happy to hear everything was copasetic for you! Towing anything fun?
The harness was long enough to reach factory plugs. The socket was well potted. I really like that I no longer need an adapter to connect my small trailer.
great product all I had to do was plug into factory wiring harness.I mounted in bumper. had to make 1 hole it and looks great. works good 4 and 7 way thanks
Wesley
2/13/2025
I have used both 4pin and 7pin plugs several times they work great very good product A+
Robin H.
2/13/2025
SO EASY UNPLUGED OLD HARNESS - PLUGED IN NEW- DRILLED 2 HOLES FOR HARNESS BRACKET
Easy installation, works just like the original factory installed one.
The only thing that I wish is that you would have included bolts to connect the wiring harness to the bumper. It provided bolts for the bracket to hook up to the bumper. I had to provide the bolts to the wiring the goes to the bumper. Not a big deal really, but if you bought a kit. You would think all the bolts needed would come in kit.
Recently went into business for myself. My old plug on my 2014 Nissan Frontier was not holding up. I messed it up during the install. Needing to pull a trailer I began searching for a plug that would work. I wanted something that was plug and play and allowed either a 7 way or 4 flat connector. During my search i came across the Hopkins Plug-in. It is designed to be mounted underneath the truck with the provided bracket. I emailed etrailer.com. I got a response back almost immediately from George. I told him what my plans were for the connector. He said that it should work as the connector didn’t need the bracket to be mounted. Since I already had a hole drilled to 2 1/4”, I prepared myself to notch my bumper a little in order for it to fit. What a pleasant surprise, this connector fit right through my previous hole. I did have to drill 4 additional holes 11/32” to mount it. I used paint primer to cover those holes up before permanently installing the connector. It truthfully is plug and play. I have attached pictures of what it n ow looks like. I highly recommend this product and company.
Arrived a day before delivery date. 15 minutes to install on my truck. Easy plug in to the wire harness. Very smooth to plug in and disconnect
organize for the June excursion. After investigating weights and amenities of a plethora of rental RVs, it occurred to me that we would need a 7-pin wiring connector instead of the 4-pin connector that the Nissan dealership installed on our 2019 Frontier. I concluded that the jumper harness under the passenger side kick plate was already in place – and that any 7-pin harness would use the same jumper. A scan of sites listed by Google made it abundantly unclear how to proceed. Multiple websites offered a 7-pin harness – but no 4-pin option. YouTube videos showed how to install a harness and a jumper – the one we assumed was already in place. The eTrailer website offered an optimum, combined, 4-pin and 7-pin harness specifically configured for a Frontier and numerous, satisfied Frontier owners confirmed the eTrailer harness operability. All I needed then was to confirm the process of disengaging the existing 4-pin harness and removing the cover to the dissimilar 7-pin harness; I was unsuccessful the three times I had tried. One website, that showed how simple the installation process was, yet cleverly skipped those two procedures. So, I called the Nissan service department and was told one of two mechanics would call me back; they did not. A second call went to the parts department voice mail -- with no return call. As a last resort, I visited the same Nissan dealership and after discussions with two customer service agents and the parts man, I was taken to a mechanic in one of the shop bays for expert advice. Oddly, he was not aware of any dual harness for a Frontier newer than 2022. Since I knew otherwise, I simply asked for a demonstration on how to manage the harness connectors. From a drawer full of Nissan cables, he pulled out a harness and demonstrated where to push with a short screwdriver. Easy! After deftly reproducing the tasks at home, I promptly ordered a cable from eTrailer. The package arrived last evening and an examination of the contents suggested that the process would be as simple as YouTube videos indicated. My installation took about 45 minutes – much of which was going back and forth to the workshop to get different items. The included, bracket-mounting bolts were longer than necessary so I sought shorter ones. A short flathead screwdriver was insufficient; an offset screwdriver was also necessary to tighten bracket bolts properly. The box wrench to mount the bracket was not the same size required to connect the harness to the bracket. The flashlight bulb blew halfway through the installation; my coffee mug spilled; I lost a lock washer in my shirt while on my back and then to cap it all off, I had to disconnect and reconnect the harness after taking pictures because I had neglected to apply the terminal grease. The installation was very straightforward and there was no excess cable to hide or wrap in the undercarriage. No bundle ties required. Perfect. Unfortunately, I cannot test the 7-pin harness at home. Well, I could with my multimeter – but there is no one else home to pump the brakes.
Thank you, eTrailer, for a great product.
The harness is well made. Unfortunately it didn't solve my problem of having brake lights but no running lights on my 2018 Nissan Frontier.
It was an easy install, has held up to abuse, and has come in handy switching between my utility trailer with a 4 pin connector and my camper with a 7 pin connector!
Bryan
8/27/2024
Has held up great, no issues
Something just shorted out after 9 mos and fried the wiring in the truck too. It’s in the shop being diagnosed. Hundreds of dollars. Don’t know if it’s this harness or something else. But it’s a pain. Ordered another one so we can diagnose it.
This harness was more than I had expected. The bracket lined up perfectly with the existing holes on bottom of bumper and the installation and testing literally took minutes. So far I’m very happy with this product, especially the fact that no adapter is needed for the 4 pin connection.
It was harder to take out the old wiring than it was to put in the whole new plug and hanger. After I finished the test was perfect for both the 4 and 7 pin plugs. Thanks trailer!
Earl
7/23/2024
Still working great after a year and a winter of NY State salt covered roads. Great product e trailer.
Very fast shipping! Was at my doorstep in three days. Look’s great and went on very easily, great fit!
No issues after a year. It was an easy instal.
Perfect fit easy to install.
Excellent customer service.
Thank you David L..
Plug and play, easy to install.
Everything came packaged just as described. I bit funky to install the nuts and washers due to a lack of access in the factory bumper, but all in all it got mounted and works perfectly.
Perfect fit & easy install
Hands down easiest installation and tough. I've banged up this thing up good off-roading and it just keeps working!
Easy to hook up! Works great! Absolutely zero issues! Very pleased with the results!
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Boppa
10/12/2025
Its been great. No worries.