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Wiring up for towing doesn’t have to mean cutting into factory wires. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs right into the existing tow-package port, giving you a solid connection for trailer lights without any splicing. It’s the straightforward plug-and-play option for getting a working 4-flat at the rear of your vehicle.
Once installed, the 4-flat connector provides the standard lighting signals—running lights, turn signals, and brake lights—so your trailer lights up exactly when it should. It’s the basic setup that covers most small and midsize trailers for safe, visible towing.
This harness includes a powered converter that draws power directly from the battery instead of your vehicle’s light circuits. That helps protect sensitive electronics from overload and ensures your trailer lights stay bright and consistent even when fully loaded.
If you need to tow a trailer that uses a 7-way plug, you can connect an adapter such as part #37185 to this 4-flat. That lets you expand to a 7-pole connection when needed, giving you flexibility for different trailers without rewiring the whole setup.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Easy installation and good instructions
It works great and installed exactly as the video described only took about 15 minutes to install and the kit comes with 2 of the 3 needed fuses plus the spare already on the vehicle, I had everything I needed
Works perfectly. Almost 0 disassembly required to install this harness.
Easy to install and works great. The video explains everything in detail.
Worked perfectly. Easy to install. Installation video was very helpful.
Perfect fit, as usual.
Plug and play 100%
Shipping AAAA product worked and fit great AAAA
Easy to install
Just what I needed.
Perfect! Easy to install. Video was on the mark!
Easy to install
Very disappointed, the incorrect part was shipped making me unable to tow a trailer for a trip we had planned for the holiday. I ordered part number c48zv for a 2025 and received a 56519 for a 2023-2024.
Mike L.
9/3/2025
The # C48ZV and the 56519 are the same exact part. The C48ZV is our part number for it. The harness fits all models of the 2023, 2024 and 2025 Honda Pilot per Curt, so what you have will work perfectly for you!
Install was easy. I used it with a set of lights attached to a cargo carrier. I like being able to roll it up inside the vehicle to avoid corrosion. I just run it out under the back hatch when we use it. I had to install a fuse to activate the trailering lights, on our vehicle. Videos available to follow process. Will by another for our next vehicle.
The wiring all seem good just package missing the fuses that cost half as much as the wiring kit and instructions said it came with it. But did not
Sent the wrong trailer wire harness. Not able to make it work.
The harness plugged right in , added the car fuses to the car fuse box and put all the panels back together and the project was complete.
Trailer hitch and wiring were quality products, and a perfect fit.
Well packaged and timely shipping.
Easy peasy. Once we found the correct angle to simply PLUG the harness into the Honda plug connection it was easy. Then we used an existing part of the car to attach the ground wire to, and had to find the correct nut to secure the wire with. The hitch was even easier with 2 people installing it. Also my neighbor has a impact gun so that thing ain't going nowhere.
I worried about the installation far longer than it actually took to install. Much encouraged by Josh, who was the person I dealt with. Thank you. Great video. MUCH LESS EXPENSIVE than the dealership installation as an accessory.
The wiring harness I purchased was great just like everyone I have ever purchased. They are quite easy to install and the video helps with a lot of great suggestions. My only concern was the fuses needed to make the harness work. The written instructions and the video were different. My suggestion is to look at what type fuses your vehicle uses before you purchase so you get the proper fuses the first time. I am very pleased with my purchase.
Etrailer is awesome! The product we purchased was easy to order and came quickly. The Curt T connector came with easy to read and understand instructions PLUS ALL PARTS AND FUSES NEEDED FOR THE JOB!!!! We will definitely be ordering from them again. I could only give 5 stars but they definitely are a 10.
Great product great price.i bought a honda with a trailer hitch from the factory but they dont supply any wiring. Its a $300 add on from honda. I couldnt be happier.
Here’s a polished version that keeps the enthusiasm:
Absolutely perfect kit! Everything was the exact fit needed for my 2023 Honda Pilot TrailSport, and it came with all three fuses as well. The video instructions on the product detail page are amazing... clear, detailed, and incredibly easy to follow. Between the fit, the completeness of the kit, the price, and the excellent directions, I couldn’t have asked for anything better. Highly recommended!
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Condition: Like New
Notes: May have damaged packaging or minor cosmetic blemishes.
Info for this part was:
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Russ
6/27/2025
Working fine