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Switching between trailers can mean swapping connectors, but this socket handles both. The Hopkins 7- and 4-Pole Trailer Connector Socket gives you a standard 4-flat for basic lighting and a 7-blade for trailers with brakes or extra power needs. You can hook up small utility trailers or larger campers without needing adapters.
If the factory connector is damaged or missing, this piece plugs right into the existing round harness at the back of the vehicle. No splicing or rewiring is needed—just disconnect the old one and snap this in. It’s a quick, OEM-style fix that restores full trailer wiring function in minutes.
Keeping dirt and water out of trailer wiring can be tough, but the spring-loaded lids on both connectors lock down tight once closed. They also help hold trailer plugs firmly in place so they won’t shake loose on rough roads. That means clean connections and reliable signals every time you tow.
The included bracket lets you mount the connector right at the hitch or bumper for a clean, reachable setup. It lines up using standard screw holes for a solid fit that doesn’t require any improvising. Once bolted down, it’s ready to plug in and go towing.
Only one connector - a 4-way or a 7-way - can be used at a time because the covers on this socket will not open far enough to allow use of both plugs at the same time.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
I really like this trailer plug since it converts a standard 7 Wire plug into both a 7 wire and 4 wire. It plugs directly into the factory wiring harness. it comes with everything you need to mount it (bracket and self tapping screws). It was an easy install. My 05 Chevy Tahoe had the factory 7 wire outlet bracket, I left that in place and mounted this bracket just to the left of it. I highly recommend this product.
I really like this product. I like that the 7 blade and the 4pin plugs are internally wired. It is truley a 'plug-n-play' unit and even has corrosion preventitive in the pins. The reason I did not give this kit an 'excellent' rating is the mount bracket is too short. This required that a use a 1 inch spacer and longer bolt to attach the mount so the trailer plug could be inserted.
The customer service Rep: Lexus G. was extremely helpful in directing me to exactly what I needed! Upon receiving the package, I was impressed with the way that the items where protected for shipping. The overall quality of the Hitch and Trailer Connector Socket where impeccable. The entire removal and installation of both units took no more than 35 Minutes. Thanks to to instructional Video!
I am Very impressed with the Company, Service and most of all the Hitch and Light Connector. Thank You so very much eTrailer for everything
The trailer hitch plus 7-4 Pole trailer connector all fit perfect on my 2018 Grand Cherokee. Installed it myself with the help of a couple of jack stands to support the hitch while I bolted it in. Saved a bundle over having the dealership install the Jeep brand. The hitch is barely noticeable. The only issue with a jeep is they do not activate the connector plug so I had to have the dealer activate it after I installed it.
Top quality trailer connector that fir original wiring harness perfectly.
Installed in under 15 minutes.
This wiring connector was a perfect fit for my 2014 Jeep Grand Cherokee. Easy to install, hooked right up to the pigtail that was already on my Jeep. Simple install.
Mike T.
4/18/2018
Thanks. I couldnt be happier with my hitch and light hook-up a year later. I use them pretty often.
Excellent price $50.00 cheaper than OEM.
Easy installation.
Unplugged wiring from OEM blank cover, installed new bumper plug taking approximately 5 minutes.
Kevin T.
1/5/2016
Good as new
nice looking product, haven't plugged into it yet to know of the electrical part, caution about the install, make sure you have about 5" clear directly behind the install location of your bracket to allow room for the connector and to attach your vehicle plug, see photo, I had wanted to mount this on the bottom of my bumper, but not enough clearance
Victoria B.
9/23/2019
A no-drill mounting bracket like # C57202 is a great way to give clearance needed to mount the wiring connector higher up on the hitch.
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Love the set up exactly what I was expecting from a trailer. Awesome quality.
Great product at a great price. It was an exact fit and looks great. I like having the ability to plug in my 7-prong plug on my travel trailer or the 4-pin plug on my boat, without needing an adaptor. Got super fast shipping too. Buying from etrailer.com was a win- win-win.
Bob R.
5/31/2014
What year is your silverado
Rachael H.
6/4/2014
Randy S.
6/6/2014
Its a 2014 Silverado 1500 Double Cab
Being in the construction industry and towing trailers almost daily it seems that I have to replace my trailer connector on a semi regular basis not because of product failure but because of occurring damage while towing.
This is my go-to connector always!
Gwendolyn Y.
11/13/2025
Glad its a reliable connector and can keep up for as long as it can while on the job!
2003 Sierra 2500 HD.
Super easy install. Purchased when I installed a new bumper and Curt hitch. Connected directly to Factory harness - no fuss. Ran the self tappers into the support bracket of the Bumper. Helps to drill a pilot hole if the material being mounted to is thicker than 14-16 gauge.
Fast delivery. Excellent customer service! The connector fit and installed flawlessly. This was my second time purchasing from e-trailer and will definitely do it again.
Scratched my head for a while, trying to find a quality way to connect this vehicle end 4/7 wire socket to my trailer ready (almost) 2015 Audi Q7. Finally decided that it really didn’t need to be bolted, but could be hose clamped to the existing heavy duty Audi bracket.
Mounted it sideways with a 1” diameter and a 3” diameter hose clamp. Be sure to use a 3” clamp with lots of serrations that all it to tighten it down a lot.
You’ll need to drill out the small hole of the supplied bracket to allow a clamp to fit through it. The other hole is a slot, and works unaltered. Small clamp on bottom, large clamp on top.
You’ll also need to relieve a small spot on the trim piece to make room for the 4-wire door to o-en freely. This is marked as red on one of the pictures.
Looks good and should work good!
Rob
9/22/2019
Good installation approach for q7’s. Keeps water from collecting in wiring junctions.
Snapped right in to the rear bumper of my Chevrolet. This company has my business for any trailer related products!
It came with it's own bracket, which is a plus. It was compatible with etrailer.com's part number C56357, which is also a plus. The self tapping screws being the only hardware coming with the item was a disappointment. I just installed etrailer.com's part number 76301 hitch receiver which has a mounting plate for brackets like this. The self tapping screws, which might have been effective, wouldn't have looked "professional." After finding some hardware which worked, it went on smoothly and fits well with the rest of the assembly.
Matt W.
7/7/2019
This product has been working well for the past year. I feel this was a smart purchase.
Here's some snaps of my Hopkins #40975 installation. I can confirm that it's an identical replacement for the 2014 Silverado 1500 trailer-light blank insert, no bracket required. It took me 30 seconds to plug the Silverado's OEM 7-pin round connector (located inside the blank insert) into the #40975 Wiring Kit and snap it into the cutout. Then I tested the flat 4-pin outlet of the #40975 with a 5 dollar 4-pin LED tester from West Marine, and all light functions tested good. Shweet! To remove the OEM blank plug, it helps to reach behind it and pinch the two spring clips holding it in place... same with the #40975 if it needs to be removed for some reason. When I ordered the part from eTrailer, your site had a comment, "This will not fit your vehicle. See below for compatible parts," or words to that effect. Maybe take a look at that and remove the comment, as the #40975 is an exact fit for 2014 Silverado 1500, no bracket needed. Thanks, eTrailer team!
Ron P.
3/19/2015
Although I havent towed since installing the Hopkins Pollak wiring kit since I installed it a year ago, I have tested the 4-pin connector for proper function using a 4-pin LED tester from West Marine and it checks out okay. Recently I inspected the kit for water intrusion mentioned by one of the raters, and I found no evidence of moisture inside the dual-connector compartment. On installation, I did make liberal use of the dielectric grease that accompanies the kit. Good product, easy installation, and great price.
The service and communication was excellent! Product was great too! Thanks for resolving our shipping issues and getting products to us quickly. Highly recommend!
This plug is exactly what I needed. I put a 7 pin on my '85 Bronco and this worked perfectly. Easy to secure in place, and I love that it comes with both a 4 pin and 7 pin connector. The spring loaded covers also help to lock the plugs in place. Great product.
Brooke M.
6/30/2025
'85 Bronco?? Those are so cool! If you ever felt like sending in a photo that has the whole Bronco in it, I wouldn't object! Glad to know the harness and plug have been serving you well this past year, too :)
Screw holes didn't line up to the holes in the hitch , but I put one screw in and left it turned away from the hitch slightly and I can live with it.
Easy to install. Connected to my truck harness with no issues. Trailer connected with no issues. Works as it should.
It fits great in the stock bumper. I didn't have to use the mounting bracket included. Solved my issue with the "Service Trailer System" alarm on the dash info center.
Plug and play! Great product. Looks factory. I had to drill a pilot hole for self tapping bolts.
Mike L.
8/19/2026
Nice job Jim, thanks for the photo!
This is a great option, it was plug and play and plugged into my Bronco's trailer ready plug. I did have to trim one corner of the bracket to fit with my trailer hitch, but that was no problem, a dremel did the trick and my mod looks professional.
The item installed just as directed, and thanks to video, I was able to locate truck wiring harness.
Plugged the wiring harness into 7- and 4-Pole Connector Socket, all my lights work on my railer. Thanks!!
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John C.
7/26/2022
Works great and looks great. Get compliments on the hitch.