Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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2009 Volvo C70
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2009 Volvo C70
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Wiring up trailer lights usually means cutting into factory wiring, but this harness keeps things simple. The Curt T-Connector plugs directly into the tail light connectors, giving you a 4-pole flat trailer plug without any splicing. It’s a clean plug-and-play setup that connects in the rear cargo area so you don’t have to run wires all over the vehicle.
Instead of pulling power from the factory light circuits, the built-in powered converter draws directly from the vehicle battery. That keeps the vehicle wiring protected from overload while delivering steady power to your trailer lights. The converter ensures reliable operation for running lights, turn signals, and brake lights even when towing long distances or at night.
Once installed, you get a standard 4-flat connector that handles running lights, turn signals, and brake lights for small and midsize trailers. It’s the connection most trailers use, so you can hook up and go without adapters or extra wiring.
The harness tucks neatly behind interior trim panels and routes through existing grommets for a hidden installation. Each connector clicks firmly into place to keep out dirt and moisture, so you can count on lasting connections that stay protected from corrosion and vibration.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
James
7/13/2026
I don’t use it often, but when I have, it works well
Lauren
7/9/2025
Used multiple times and no complaints after a year. Very happy with it
Kerry
9/29/2023
A year later and works As good as the day I installed it. Highly recommended to buy from here.
Victoria H.
4/14/2025
Happy to hear that the install videos were so valuable to you Mark! It sounds like everything came together smoothly for you. Towing anything fun?
Will
12/11/2023
Still working perfectly. One thing to note is that the brake and signal lights on the 2021 Toyota Venza are completely obscured with my Thule hitch in both the lowered position and the folded up position. I ordered 2 sets of lights, CURT 53201 Auxiliary Automotive LED Light Strips for Hitch Cargo Carrier, Bike Rack, 2-Pack CURT. 1 for each position of the bike rack, lowered or folded up. I joined them with, Trailer Wiring Harness Universal 4 Way Flat Y-Splitter Plug and Play Adapter Extension Harness for LED Tailgate Light Bar and Trailer Lights
Jenny N.
12/11/2023
Axlz
6/17/2025
I have no complaints, the connector is still working wonderfully
Jenny N.
4/15/2022
The installation of the harness is more involved then some when accessing the plug locations. I recommend going slow and completing all the installation steps carefully. You can use double sided sticky tape if the tape from the harness is not holding.
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Moises
10/30/2025
After installing it test it, and worked very well i did a long drive pulling a trailer 4x8 and another one 5x9 dont remember exactly the numbers but I used and it worked very well on my 2021 venza I did not have to use extra hardware just what it came with the hinge.