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When your vehicle didn’t come with a factory tow package, this harness makes it simple to add trailer lighting. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly into existing wiring and includes all of the wires and connectors needed for a complete install. There’s no cutting or splicing—just plug in the connectors, route the power wire, and you’re ready to tow.
With a built-in 4-pole flat connector, this harness gives you the essential lighting functions—running lights, brake lights, and turn signals—for safe towing of small and mid-size trailers. It provides a clean, reliable connection every time you hook up.
If you later need to run trailer brakes or a 12-volt power line, this 4-pole harness serves as the base for an easy upgrade. Add a brake controller installation kit like part # ETBC7 to convert your setup to a full 7-way system. That means you can grow from basic trailer lights to full brake and charge capabilities without redoing the wiring.
The integrated powered converter ensures that the trailer lights get the right amount of power while protecting your vehicle’s factory wiring from overloads or shorts. It keeps the signals steady for consistent light performance every time you tow.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Not only did the wiring unit fit, it was easy to install. The CSR was extremely helpful in explaining the install but also in determining the correct unit.
very easy to install, looks good and dies what it was designed to do. It hasn't seen much weather or miles yet so time will tell if the paint holds up.
Plug and play. Works great!
Good instructions and fairly easy to in stall.
Good - It all worked.
BUT - an extra 6 - 10" of wiring to the battery would be nice. I had to add on.
Easy installation, work's great
Installation was easy everything was included that I needed.I was ready to roll in about 30 minutes!
This product is great and easy to install. The video on your site helps a lot. Thanks
Was very easy to install. The only problem I had was the in line fuse wiring was bad. The fuse was fine but the wire had a break or something. I had to get a replacement at the auto part store then worked great. The ease of install is definitely worth the price.
Very easy to install on my Dodge Durango it took about an hour to install completely, the instructions was plan and simple to understand, I was out catching crappie the same evening.
Great product,took about half an hour to install on my 05 Durango.Fast shipping and great customer service.I will buy here from now on. No more splicing wires for me.
Very easy installation, Excellent product.Boat trl. lights have never been brighter, Thanks
Exactly what was on page is what I received. And instructions were on point. If I was blind I probably could install my hitch thanks to there guide videos.
Ordered a wire harness for my truck. Item was shipped fast and worked great. Thanks ETrailer
Worked great. Wasn't able to get the power wire through the frame on my 2008 Durango like the video did but zip ties fixed that.
Needed this kit last minute so my wife could pull our trailer to a pig show with our Durango instead of our "big farm truck." Install video made it a breeze to install, shipping was fast!
Great no splice method of adding trailer lights to my Subaru Outback.
LOVE IT!!! Big time saver, simple to use and install. Looks very professional. BIG BIG TIME SAVER. Use this and you wont be one of those truck with the reverse lights on while in drive.
Product was exactly as ordered, everything was there to do the job and installation was a snap. The included instructions made it very simple. It works great. Fast shipping. Will definitely do business with you guys again. Thank you!
This is one of the easiest wiring system I have put on, instructions were good and all the hook ups was easy. I would recommend this product to others.
Carl
8/17/2018
Yes, working great
Product arrived quickly and was exactly as pictured. The only issue with this product was that the black wire, for connecting the vehicle's battery to the power prong of a 7-pin trailer connector, was too short. I needed about 2 to 3 feet of extra wire on my 2008 Dodge Durango.
Installation was strait forward and easy. All pieces was there and easy twork with. Videos were nice to have for reference. Way to go Etrailer!!!
Lewis
8/21/2016
Everything is still working great. Installation was easy. Price was right. Etrailer is the best.
Super easy install!
2 sided tape for power box isn't the best idea so I ty-wrapped up out of the way of dirt and heat above the spare tire. I suggest heat shrink tubing for all connections rather than electrical tape. And use a proper crimping tool, NOT pliers! Harness was installed in less than 15 minutes but fishing the power line to the battery thru the drivers side frame, was a bit of a challenge and took about 30 minutes with 2 people and a fish tape.
Chris
6/1/2022
Works great after 1 year
This harness works great
Ease of installation and it all works very well. Pleased with the purchase would buy another one.
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.
Tom
6/19/2017
No Problem - Will buy for my next car.