Arrives before Christmas To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
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Connecting a trailer has never been easier with the Curt T-Connector Vehicle Wiring Harness. Designed to plug directly into your vehicle's OEM tow package port, installation is straightforward and requires no cutting or splicing of wires. This feature makes it simple for users, even those who aren't mechanically inclined, to quickly install a durable electrical connection.
This Curt wiring harness isn't just a one-trick pony. It seamlessly works with 5-pole, 6-pole, and 7-pole adapters (sold separately), making it incredibly versatile for a variety of towing needs. Whether you're towing a small utility trailer or a larger boat, this feature has got you covered, ensuring every trip is a smooth one.
Keep your connections safe from the elements with the included dust cap for the 4-way flat connector. This thoughtful addition helps prevent corrosion, ensuring that your connections remain reliable for as long as you own your vehicle. It's these small details that make sure your trailer lights work every time.
When you're on the road, signal light reliability is crucial for safety. The Curt T-Connector provides a reliable 4-way flat trailer connector to power your trailer’s signal lights, ensuring clear communication with other drivers. This makes it ideal for those long hauls and quick trips alike, allowing you to drive with confidence knowing your lights are in perfect working order.
Experience OEM-level quality with the Curt wiring harness, built to withstand the rigors of everyday towing. Customers have praised its high quality, with many noting its effectiveness even years down the line. Its robust construction ensures that it lasts, providing you enduring value and reliability over time.
With its custom-fit design, this wiring harness plugs directly into your vehicle's factory tow package wiring harness located behind the rear bumper, making it a perfect fit for various vehicles. Users have reported installations as fast as three minutes, highlighting the convenience of this precision crafting for those looking for a quick and snug connection.
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ok so i plugged connctor in and attached to trailer and no lights. so i checked both fuse boxes and they are ok. whats next?
Took about 2 minutes to install everything. This is the wiring harness to use for 03 highlander with towing converter package. Connection wire that harnesshooks up to is inside the black compartment under side of the vehicle. You will need to install the 20 Amp fuse in the fuse box in the engine compartment. Everything comes with the harness kit.
Wow! What a great experience dealing with etrailer.com. I received the hitch and wiring harness and it took longer to pull the staples out of the box than it did to install all of the parts. It is all in now and waiting to hook up the boat trailer and do some fishing. I can't say enough as to how pleased I am. If backing up the trailer goes as well as the installation, I will be grinning for the rest of my life.
Dennis B.
Dennis B.
5/28/2015
I absolutely love it, the best accessory I ahve added to my Vehicle!
The products I ordered arrived on time and as expected. I have not had time yet to install them. the video's are very helpful and shoe me what to expect during installation.
I got a 2008 LX 570, fits perfectly! Easy to install, takes less than 15 mins. simply Plug & Play! Strongly recommended
Ordered on Saturday, shipped on Saturday and arrived on Wednesday. The hitch and wire harness were easy to install - from start to finish took a little over 1 hour. All holes lined up with no adjustments. Looks Great!
Came on time; fits perfectly
Extremely easy to install, even came with a fuse for the trailer lights!
Highly recommended doesn't get much easier to install
Fast and easy, perfect for what I needed
Plugged right in and worked great.
Easy set up. Easy to use.
Trailer hitch and wiring harness I ordered for my 2002 Highlander fit and worked perfectly.lt came in perfect condition in only 3 days.
Will definitely order from etrailer again.
Straightforward install. Just pop the plug cover on the vehicle connector, plug the trailer connector and you're good to go.
I always get my trailer hitches and supplies from etrailer and have never been disappointed. The quality is good, price is right and they ship it right out!
It didn’t fit my vehicle, 2010 Lexus LX 570 even after research on forums and looking for the connector on the passenger side.
Sierra K.
5/10/2022
This product is intended as a replacement piece for your factory 4 way flat.
Replacement for my 2002 4Runner. After 20 yrs and a splice you’d have to imagine there would be some degradation to the OEM harness. The OEM harness had gotten pretty finicky. This was a direct plug and play kit. It plugs in near the driver’s rear corner, route it, a few zip ties and everything is G2G.
Product was delivered on time and included in the box with my new DrawTite hitch. I'm looking forward to installing my hitch and electrical harness this weekend. Hitch was boxed well - no damage. Thank you.
Perfect fit for my car.
The wiring harness was a good thing ,easy to install came the instructions it just plugged right in, zip tie it and was done thank you
Very fast shipping exactly what I was looking for easy instill took 10 min but would have taking 5 min if I got the bracket for the 4 pin to mount but I didn't had to reuse the old one will and already recommend etrailer.com to friends
Harness itself is extremely high quality as well as the connector for it. I only gave it 4 stars because it is about 1 foot longer than it really needs to be for the car. Not s big deal but since it’s vehicle specific I’d like it to be a little shorter to fit the application better. Overall I’d recommend though, it’s high quality and works great!
super easy to install, so glad my Toyota was pre-wired. Easy to tell if you open the spare tire area you will see a blue towing controller box.
Came quickly. No damage. Hitch went on without a hitch. Electrical connection was very easy to install. Works great!
Perfect fit! Even at 21 years old the Lexus was ready to go with no difficulties and this tow hitch lined up perfectly and flawlessly. Fluid filmed the metals before encasing them.
Part was delivered quickly and in good condition. Fit was perfect and did what I needed it to do on a Highlander with a factory tow package.
Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
At etrailer.com 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. Let us know if anything is missing or if you have any questions.
Mike L.
9/11/2025
The harness is intended for vehicles equipped with the factory tow package. If you don't have the tow package, the harness might not work. What's the year/make/model of your vehicle?