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Wiring a trailer doesn’t have to mean cutting into factory wires. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs inline with the existing tail light wiring behind the driver-side trim panel. It’s a true plug-and-play setup—no splicing, no guesswork. Just locate the factory connector, snap it in place, and you’re ready to tow.
Once connected, the built-in 4-way flat output provides power for your trailer’s running lights, turn signals, and brake lights. It delivers the basic lighting functions most small and mid-size trailers need so you can hit the road with safe, reliable visibility.
Vehicles with separate turn and brake circuits need signal conversion for trailer lights to work correctly. This harness includes an integrated converter that combines those signals safely. Rated at 3 amps per stop/turn circuit and 7.5 amps per tail light circuit, it handles typical trailer loads without overloading your vehicle’s system.
The 4-way connector is designed to be stowed inside the rear cargo area when you’re not towing. When it’s time to hook up, simply pull it out and close the hatch over the wiring—the weather stripping cushions it without damage. This keeps the plug dry, clean, and protected from corrosion between trips.
The connection points sit behind trim panels on the driver’s side, sometimes near or just ahead of an air conditioning unit. Once accessed, the harness tucks neatly back under the panel for a factory look. It’s a straightforward install that leaves nothing hanging loose or exposed.

The Curt T-Connector Vehicle Wiring Harness # C55355 is designed with an integrated converter for vehicles that have separate brake and turn signal circuits. It provides a standard 4-flat trailer connection that carries turn, brake, and running light signals. The harness installs using existing vehicle connectors without any need for wire cutting or splicing.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
fitment was very good
Great price!
Was so easy to hook up. Fast delivery
This is as good as it gets, watched the videos they had for my specific model 2003 Montana, did it by myself since I had no help, no problem. Perfect. They send you everything you need so you can't go wrong. A+++, extremely happy.
it was complet was nice to have a hookup no wires to cut
Installed as advertised. Has given great service. Will definitely be back for future needs.
very good,was delivered on time, and worked fine, I am happy with this product, thanks
Fast easy connection and install. Saved my hundreds and over a year later still works perfect with no problems.
Thanks again George.

Susanmiles
6/18/2024
FANTASTIC!!! still going strong, would definitely buy parts from them again. Thank you!
product was great fit perfect works great just as advertised
like all the help and instructions that are available
I would use this product and company again thanks
Did not work. Took the vehicle to the local trailer dealership where they replaced the unit with one of theirs. Been working fine ever since.
EXCELLENT PRODUCT
MADE TOWING MY TRAILER AND BOAT SUPER EASY
JUST PLUG IT IN AND GO
NO CUTTING WIRES
THANK YOU
ETRAILER
Wow!. Fast service. I ordered this item on a Monday, maybe around noon. By the next day around 3:00PM it was at my doorstep via UPS Ground.
This item works exactly as it should and was a breeze to install. Just like the video on the etrailer website demonstrated, you just basically plug it in to an existing plug on the vehicle, (a 2001 Chevrolet Venture), and connect the white ground wire to the body of the vehicle. Thanks etrailer!
Ordered this for my brothers 2004 Chevy Venture. Installation was simple: Plug and Play! It's been a year and it still works perfectly. Can't say enough about this company. Super fast shipping, and excellent tech support if you need it.
Works great. Was difficult to find the vehicle in-line connector. It was hidden behind wiring and tubing for rear blower assembly. Once located, and pulled out to get to it, install was a cinch. But I did have to remove LR taillight assembly to get enough wire release to pull factory connector plug assembly out of it's hiding place. Obviously, it did not go back where it came from.
This van is the Premier version of the Olds Silhouette.
The trailer hitch installed in about 20 minutes and has functioned well towing small trailers. The wiring took a little longer to interpret the instructions, but once we got started, the install was very simple. I did not rate the product 5 stars because I have not put a significant load on the hitch to know how good it might be.
Did not receive it with order
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Ronald
6/28/2019
ok I really aint used the trailor that much but it seems to be ok