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Running new trailer wiring can be a headache, but this harness skips all the guesswork. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs right into the factory connection point behind the rear bumper on the driver’s-side frame rail. There’s no need to cut or alter any wires—just plug it in and you’re ready to tow.
This harness gives you a standard 4-flat connector that handles all the basics—running lights, turn signals, and brake lights. It’s built so that signals work correctly together, including maintaining turn signal function even while braking. That means your trailer lights stay in sync and visible for safer towing.
If you plan to tow heavier trailers later or need electric brakes, this harness makes that easy too. Once you have this 4-way installed, it becomes the base for adding a 7-way connector using a kit like the ETBC7. That setup supports brake controllers and adds a 12-volt power line for extra accessories.
Because it connects at the factory wiring port, the Curt harness routes cleanly along existing paths instead of running loose wires under the vehicle. The result is a neat, factory-style finish with solid connections that hold up over time.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
It was the proper part and shipped in a very reasonable amount of time.
Does what it says
Good product. Thanks
mucho bueno thanks.....works great.....!
Awesome product! I just received mine and had it on my truck in 5 minutes. It works exactly as its listed on the website!
Perfect fit, just as described.
HEY THANKS FOR THE STUFF, WORKED FINE

Franz H.
5/24/2018
Great thanks
Very easy to install. Immediate shipment. Better than bargain price. Well thought out design.

Micah
5/18/2022
Works great. My 9 year old son wired it up for me with little supervision. Still works great after a years worth of hauling. No blown fuses.
fast shipping exact fit works well
Works great , Etrailer has everything and the prices are great to
I needed the extra wiring to ensure a solid fit, everything was plug and play great job!
Excellent product. Super simple and perfectly made. Great compliment to my excellent new hitch from E trailer.
Great wiring kit, just as the description and picture shows. Have yet to install but looked at the existing wiring and will match up perfectly.
Exactly as described. Connected to factory harness with no problem.
Perfect fit! Easy install. Happy Man
The harness got salt in the connector prongs and started rusting and I went to pull them apart to hook up a trailer and the prongs broke off same thing happens the first time I ordered one.
The wireing and connecter ' s are well made and the assembly is simple and straight forward. The ground screw isn't suitable for frame rail , I drilled 3/32 as recommended but screw broke.i went ahead and drilled to 1/4 and bolted ground wire. Delivery was ok except usps dropped the ball as usual. Good product will use them again.
Great product. Matched up exactly with the OEM wiring on my truck. Easiest trailer wiring harness I've ever used. Took all of 5 minutes to install. Quality looks great, should last for years.
I needed to wire up a flat bed lights. I wanted to find a plug to plug right into the stock plug.
This was exactly what I need to complete the project.
Product installation was super easy.
Basically plug in and go.
No wire nuts or flimsy connectors that are just a source of corrosion.
This rear bumper wiring harness allowed me to replace the original harness that had been butchered by no-strip squeeze connector that had rotted the wires.
Absolutely worth buying.
This took like 60 seconds to install without the directions! Super simple and easy to figure out!
havent installed it yet, looks like good quality
Easy to install!! WAY BETTER than CUTTING WIRES!!! Unplug and plug back together!!
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Bruce
5/11/2024
It is still working fine. The Weaterpack seals on the harness are still water tight and the flat plug works perfectly.