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Wiring a trailer can be a hassle, but this harness keeps it simple. The Curt T-Connector plugs right into the factory connectors behind the tail lights. No wire cutting or splicing needed. It’s a straightforward plug-in setup that gets you towing faster and avoids messing with the vehicle’s original wiring.
Modern vehicles use sensitive electronics, so this harness includes a powered converter that isolates the trailer circuits. It draws power directly from the vehicle’s battery through a separate hot lead, protecting the factory system while controlling your trailer’s running, brake, and turn signals. That direct 12-volt connection ensures reliable lighting every time.
Once installed, you get a standard 4-flat connector to power your trailer’s signal lights—running, turn, and brake. It’s the common setup for small and mid-size trailers and works seamlessly with accessories like 4-to-7-way adapters when you’re ready to tow more complex setups.
Even if your vehicle didn’t come with a tow package, this harness has you covered. The plug-and-lead design provides everything needed for proper trailer lighting without adding extra modules or tapping into existing circuits. It gives you full lighting function while keeping the install clean and hidden behind the panels.
The Curt T-Connector Vehicle Wiring Harness #C27BR only powers trailer lighting functions and must have its own dedicated power wire to the battery. It should not share a power circuit with other adapters or controllers. Always install the fuse close to the battery for proper circuit protection.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
Very easy to install!
Works great easy to install.
Package was in the same bad as hitch, but everything was there, so what do I care. I’ve been using solder seal shrink wrap but end connectors. Heat gun melts solder and shrinks wrap. Routing power wire to battery is not for the faint of heart, but I knew what I was getting into. Service was fantastic. Ordered Tuesday and had it on Thursday!
Very easy installation and works great with my little boat trailer and utility trailer. Little challenging feeding the power wire to the battery but got it done.
Have not installed yet
Order came faster than expected. 2 boxes both in good shape. No problem I will revise if anything comes up during installation.
Works perfectly
Directions were not very clear and tech assistance was wrong but after laying it all out by color we got it figured out
Almost plug and play! No need to cut any factory wires which was a huge plus, as well as an incredible video walkthrough that makes install seamless. The only wiring you need to do is for the power wire, but all wiring and connections are included. Very easy install.
Had this installed by a professional body shop that had proper tools and know how. Tool them a little over 2 hours to install hitch and wiring. This particular wring configuration has to have a hot wire run to battery area. Excellent product, quick shipping and fair price.
Fit and finish are top quality. Everything fits amd works as it should.
Works well, installation was more work than expected but we got it done with no problems, just a little more time than expected.
Works like a charm. Was easy to install following the video instructions
It was pretty much plug and play except for for running wire up under hood for power. The drawtite hitch I will be using has a provision for trailer plug mount, but to get the plug to the provision via the shortest path from the taillight caused a concerning amount of tension, so would recommend adding a couple of inches to the four pin connector to give a little more flexibility in placing the connector on the hitch assembly. This is and the lack of shrink tubing to waterproof the butt connectors is the only reason for 4 stars.
Works as described and the install videos were an amazing step by step. If I could give 4.75 stars i would because the power wire was short about 6 feet and I followed the video to a T.
Difficult to run the power wire but worked excellent
The quality is great! And all the parts were correct and arrived fast!
Install took a little longer than 2.5 hours as my husband and son had to redo the wiring. They did follow the video which helped a lot!
Install videos were very helpful.
Works great. Exceptional step by step video showing you exactly how to install it.
The install was easy following the videos. The wiring was the most difficult part, had to run a wire from engine bay to hitch. If anything was a little lacking, was the wiring video. But overall a great product.
Top quality items. Good delivery time. Installation videos help. Thanks.
I have not installed yet but have used Curt T-connector wiring harness in 3 of my cars in the past and never had a problem with them.
The T-Connector is was a super easy install when installing with a hitch because the rear bumper cover is removed. The only thing missing from the kit was enough wire to run from the rear of the vehicle to the front and about 30 more zip ties. Do not let that kill the deal. This is a must for anyone adding a hitch to their Grand Cherokee.
I installed this plug and play” wiring harness on a 2024 Jeep Grand Cherokee Limited. The connectors to the taillights were exact. The only real effort involved was routing the power line to the battery which, in the scheme of things, could have been much more difficult. Installation took about 1 hour from start to finish. Very pleased with the design and installation. The videos on the website are comprehensive and offered good insight.
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Gwendolyn Y.
3/11/2025
Your husband and son did a great install! What are you going to be towing?