To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Instead of switching between connectors or adapters, this socket gives you both a 7-way RV-style and a 4-flat trailer plug in one spot. It’s a clean, single-mount setup that handles electric brakes, reverse lights, and 12V power through the 7-way, while still covering the basics like running, turn, and brake lights through the 4-flat.
The socket comes with a sturdy bracket and self-tapping screws, so it mounts easily to a bumper or directly to the trailer hitch cross tube. Once it’s bolted up, the connectors sit securely in place and are easy to reach when hooking up your trailer wiring.
When your vehicle already has a factory tow wiring harness with a USCAR plug, this socket connects right in without cutting or splicing. It’s built for a direct fit, making it an easy way to upgrade from a 4-flat to a full 7-way/4-flat setup.
Whether you’re pulling a small utility trailer, boat, or camper with electric brakes, the combo socket covers it. The dual connectors mean you can switch between trailers using different wiring styles without having to rewire or carry extra adapters.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
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.









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.