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Plug this adapter into your existing 7-way when towing a trailer equipped with LED lights so that your vehicle's computer will recognize the trailer's signals. Designed for use on vehicles with Trailer Lamp-Out sensors.
Features:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Jeff Hello everybody, this is Jeff at etrailer.com. Today we're gonna take a look at this CURT seven-way trailer adapter for towing trailers with LED lights. Now, this'll basically plug into your existing seven-way socket, and it provides a new seven-way socket that's able to recognize LED trailer lights. They use built-in resistors, which'll enable the LED signals from your trailer to be read by your vehicle's computer. And to install this, there's no cutting or splicing required. It's basically just a plug-in.
This is great for use on the vehicles with the trailer lamp out sensors, like the Audi, the Mercedes and the Volkswagen vehicles that have the factory tow package. What this adapter will do is simulate the increased power draw so the vehicle thinks there's incandescent lights on the trailer. Then you won't get the lamp bulb out reading that usually flashes on the dash of those vehicles. You can see it also, right here, has a nice spring-loaded dust cover. This'll help protect the terminals from moisture and debris when the connector is not in use.
Overall length on this from one end to the other is about 12 inches, and you can see it is a flexible cable. But that should do it for the review on this CURT seven-way trailer adapter for towing trailers with LED lights..
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
The wiring kit was perfect for trailering our Jeep. My husband did it himself in the instructions were easy and support was the company. Would use them again.
This product is amazing and works extremely well. I wish I would have known about it sooner. I use it with a Mercedes Sprinter chassis on a small RV. When towing a jeep I was always having light issues. Once I strated using this adapter it corrected everything. I highly recommend this item.
Just got a 2025 ram 1500 an my boat trailer lights were blinking in the morning and throwing codes. For 4 day in a row before I got the new truck I towed my boat with the old truck and no issues. So knowing it was the truck and not my trailer I was looking for a solution and found this. Plugged this into truck and trailer with lights on no blinking tried without the new plug blinks put the new plug back on no blinking. I’m so happy was driving my crazy for 2 weeks now all is good.
It solved the lamp out on trailer messsage on the truck due to the trailer LED lights.
Perfect problem solved!
Fixed the issue with my 2009 GL-550.
Was super bummed when I purchased a new 2018 Flacon 23RB and the trailer dealership couldn't get the lights to work with my GL, even after putting in resisters and couldn't leave the lot with the trailer on the back of the GL, had to a friend's truck. Mercedes didnt have any answers either. So hit Google and found this pig-tail.
Thank you SO much!!
Awesome product, very high quality
I had a low battery drain. Because I didn't have the right plug. This is the right plug everything works, great
Fix my LED light issue with my 2022 GMC pick up
In October 2021, I purchased several packs of LED bulbs from etrailer and replaced the dim OEM incandescent marker lights and turn signal lights on my 2021 Coachmen Freedom Express UltraLite 192RBS travel trailer.
Replacing the bulbs was a piece of cake and took only a few minutes. When all the bulbs were changed out, I hooked up my 2020 Ford F-150 and connected the 7-wire connector. All of the new LED bulbs worked flawlessly as expected.
When I made my next trip in the travel trailer, I starting getting “fault” messages on my Ford F-150’s instrument cluster. These messages were alerting me to a problem with either the turn signals or the trailer lights. The first couple of times this happened, I immediately pulled over and checked all my lights. Everything was good. I hit the “OK” button on my steering wheel and turned off the warning. During my six-hour trip, I received these warning messages numerous times (and never a problem was detected).
I sent etrailer a note a couple of weeks ago asking if they had encountered this problem before. Becky B. quickly let me know that my problem was not unique. She suggested etrailers Curt adapter (item C57003) as a possible solution.
I quickly ordered this adapter, and I used it this past weekend (26 March 2022). The adapter worked great! No more “fault” messages.
Thank you, Becky B., and etrailer!
We had LED light strips added to the rear of our 2026 Rockwood TT - the left side worked as expected but the right side didn't!!
So far so good the trailer is in storage right now. When I received the adapter we went over and hooked into the 7 Way with the adapter - lo and behold very thing worked as it should - the right signal no longer has a hiccup when flashing and was in sequence with the factory installed tail light.
This product does exactly what it supposed to: allows truck computer to recognize LED trailer lights. It’s a bit clunky with the 7 blade receptacle looking like an off the shelf component. The first one l received, the main cable insulation was too short, thus exposing internal wires allowing for potential water infiltration. The replacement was just fine. Great customer service in replacing the original part.
This did not fix my problem. Chevrolet has a problem with electric brake trailers. Brakes kick out all the time. This made no difference.
Kate F.
11/19/2025
What brake controller are you using, or is it the OEM one? What is the year and model of your Chevy? Are they just electric brakes, or electric over hydraulic? And can you please explain the issue? Just trying to dig a little deeper so we can get you sorted out =)
Works great solving low power issues being transmitted to your TOAD from LED Motorhomes to properly power your TOAD breaking system.
Does not fix the problem i bought it for
Furion rear camera
Heather A.
4/11/2026
This adapter is designed to help with LED light compatibility, but it doesn’t address pulse width modulation issues, which is what typically causes the power problem with Furrion cameras on some vehicles. So while it’s working as intended, it won’t resolve that specific camera issue. For setups like yours, a PWM filter like part #FR87PR is usually the right solution to get consistent power to the camera. If you want, we can help make sure everything is set up correctly for your vehicle and camera so you’re not chasing the issue any further.
Great to have lights work right now and shipping was fast thank you
I asked all the fb and forums I could think of but neglected to mention my jeep had LED lights. This adapter worked perfectly.
Fixed my issues on all my trailers since they all have LED lights
Fixed my light warning message in my truck which caused the turn signals to flash quickly when truck lights were on.
One year later and still works. No issues with my trailer lights on my GMC 2500 since and no more blown fuses or blown trailer light/brake modules. Highly recommend if you're having similar issues to what I had.
Interesting that I would need such a device but here we are. My Porsche Cayenne computer needs some kind of resistance to know that a trailer light array is connected. Regular lights provide the ohms required for the computer. LEDs do not. This actually works though it looks a bit "untidy"
If you have a GMC/Chevy truck and are connecting to a trailer with LED lights - in my case brand new 2026 truck and < 1yr old Sport Haven trailer with modern LED lighting... the trailer-computer smarts in the truck was not detecting the trailer - NO LIGHTs. This gizmo FIXED THIS ISSUE by providing the resistive load necessary for the truck to recognize the connected trailer. Took me a while to figure out then find this solution - hopefully this helps someone else having the same issue.
Kate F.
3/11/2026
Glad we had the fix for you Mark! Not sure why the LED lights don't like to play with the Chevy/GMC wiring. They will get it figured out one day =)
My 2020 2500 GMC did not recognize my trailer, with LED lights being connected. This plug corrected the issue and everything worked properly.
I have a 2026 GMC Sierra 3500 HD Denali towing a Cedar Creek 5th Wheel with LED lights and Haloview camera system (Upgraded from a Furrion Camera System). I never had any lamp warnings with the Furrion cameras however once I swithced to the Halowview Camera(also included built in LED lights like the Furrion), I kept getting intermittent Check Trailer Lamp warnings. I have now used the C57003 on 2 trips with zero lamp warnings. Works as advertised.
Clumsy, but it works. Looking at this, you might think that you could mount it to your existing trailer light connection, and then maybe even mount it to your bumper somehow. Nope. For one thing, the cord from male to female plugs is way too short, but more importantly if you did that your car would always think a trailer is attached, so you would lose your "you are going to hit something" warning when in reverse. So, this is going to attach to the business end of your trailer cord for forever. The product description says, "Spring-loaded dust cover protects terminals from moisture and debris when connector is not in use" but when it is not in use, it isn't hanging from your car, it is still connected to your trailer.
The dust cover adds a lot of bulk and weight (adding to the stress on the actual connection to the car). I thought maybe I could remove it, but that isn't possible. It would look better and be less weight without that awkward cover.
This will work for now, but I'm going to look for something that I can wire up inside my trailer, where the cord enters and then connects to the various wires to each light. Does eTrailer have something like that?
Do you have a question about this Custom Fit Vehicle Wiring?
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James
8/18/2025
It still works. I wish there was a sleeker version.