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Your cart is empty.Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. CURT electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This 7-way USCAR replacement harness is designed to replace an existing USCAR plug and supply power for tail lights, turn signals, electric trailer brakes, a battery, reverse lights and brake lights, as well as a ground connection. It features rust-free black plastic construction and comes with color-coded wires and 24" of bonded wire for easy splicing into your vehicle's wiring system. This 7-way USCAR connector is a female-end socket, specifically designed for the vehicle side of the connection.
Jesse E
Reviewed in Canada on March 8, 2025
Quality was as expected from Curt. Wire colors/ Pinout on instruction page included in package. Wires are pre-stripped with the plastic left on the tips, which are easily pulled off, allowing for quick, easy splices. Butt splices, heat shrink and zip ties are included, though I chose to use great shrink solder seal connectors for no particular reason.Fit perfectly into Curt 57020
John Gonsalves
Reviewed in the United States on September 13, 2024
We use these for installing the 7+4way trailer plugs in multiple commercial & retail applications. Fits great with the HOPKINS 40975 trailer plug.
Miguel G.
Reviewed in Mexico on August 2, 2024
Lo acabo de utilizar para una tacoma 2021 y funciona muy bien.
RSA
Reviewed in the United States on December 17, 2024
I needed to replace the OEM plug on my 15 Silverado. All of the colors matched except for two. Plenty of wire to make install easy. The wire gauge on the truck and the Curt 56229 were different size. The Curt is a larger gauge wire.
JP
Reviewed in the United States on October 4, 2024
The plug fit my 2020 ford F150, and the wire color coding was an exact match, I'm very happy with the product.
Jack Hudgens
Reviewed in the United States on October 2, 2024
Extra long wires for connections. Quality material and connectors included. Replaced 2020 GMC 7-way trailer male side.
Mike Truman
Reviewed in the United States on April 11, 2024
Works great and easy to install
NATHAN
Reviewed in Canada on October 27, 2023
Bought it to replace the jeeps plug. Pretty simple install as it came with everything. Needed a bracket as mine was fubar. Lots of wire to make mistakes with. Ask me how i know. Haha.Heat shrink, then crimp connect wire. Haha
Uncle Duck
Reviewed in the United States on December 23, 2022
This seems to be a well made harness with adequate wire size and complete set of crimp style connectors and heat shrink tubing to seal up the splices. The first thing I noticed was the connector end had "Adelphi" on the part, so we know who actually made it. The crimp on crimp on connectors were uninsulated sleeves which crimped securely onto the wires. They were all the same size and would not fit over all the strands for the ground wire which is a larger wire size than the others. I had to cut off some of the strands of the ground wire to make it work. The other minor item was the heat shrink tubing for sealing the splices was relatively large compared to the wire and crimp connector size making it right at the lower limit to shrink the sleeve. I had some other heat shrink, 3/16" diameter, that I used.
Main Character
Reviewed in the United States on December 11, 2022
This harness was not a wire-for-wire color match to my GMC truck, but it was easy enough to clip the wires on the old harness and compare them to the new harness, matching up the colors by their position in the back. Simply make sure the wires from the new harness are butt spliced to the truck wires according to the corresponding position in the old harness, rather than by color alone. What I did was to compare the two and use a piece of tape to label the harness wires that needed to be spliced to different color wires on the truck. I use marine-style butt splices because I prefer them, but the kit comes with adequate crimp connections. If you use those, slide the shrink tube on first before crimping the wires together. Then use a heat gun or a lighter to shrink the tube to make the connection watertight. I wrapped the wires from one end to the other with electrical tape to make it easier to keep them neat.
Fernando Fernández Barba
Reviewed in Mexico on January 14, 2022
Extraordinaria calidad y entrega oportuna.
Mike
Reviewed in the United States on May 24, 2021
Install was as you'd expect. My 05 Silverado plug was jacked up so I ordered this and threw it on there. It fits snug and seems like it will hold up. Its been on there a month with lots of rain and no issues. Honestly if anything were to go wrong with this anytime soon it would probably just be my connections lol.
Rick Davey
Reviewed in Canada on December 8, 2020
Love this product it worked really well the fit is great I now have it installed on my truck and it worked great
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