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Wiring a trailer usually means tracking down wires and making splices, but this Curt harness skips all that. The T-Connector plugs directly into the vehicle’s existing tail light wiring to give you a 4-pole flat trailer connector. There’s no need for a factory tow package—just plug it in and it’s ready for use.

Towing often means exposure to rain, puddles, and road spray. This harness is built to handle normal wet conditions without issue, keeping your trailer lights working dependably. It’s not made for submersion, but stays dry and protected in everyday use thanks to the weather-resistant 4-flat connector.
Once installed, the 4-pole connector gives you the standard lighting functions—running lights, turn signals, and brake lights—so your trailer stays visible and legal on the road. It’s a simple way to add all the essentials in one clean hookup.
Some harnesses need a separate ring terminal ground, but this one doesn’t. It’s designed to ground through the factory connection points, so there’s no extra wire to route or attach to the frame. That keeps installation cleaner and faster from start to finish.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Works just like my old one. Great pric e.
works good
Easy to hook up. Solved the problem thanks
Perfect fit, works great
Works as expected & easy install just be sure to anchor brain box securely.
Product is as expected and arrived in good condition on time
Great
Great product and was shipped and here at my home very fast. Also the follow up from company employees was great. I will buy from this company again
Fit perfectly.
Fit perfectly and works great.
Very easy to install.
Thank you the product we ordered was perfect and quit PVC to quickly
Arrived when expected - easy installati on.
Very glad I purchased this product. Factory harness hookup vs. wire splice is the WAY TO GO.
Converter is only convenient way to hook up trailer wiring to Ford Rangers and Mazda pickup's that have a separate circuit for the turn signals. The amperage ratings for the circuits supply adequate amperage for most trailer lighting and according to the documentation there is a circuit breaker for any overload situations built into the converter. Instillation couldn't be any simpler on the Ranger. This is a replacement for another brand converter that burnt out because the circuits didn’t have the capacity for the amperage draw on my new trailer.
Easy to install. High quality part. Thank you!
Installation was a breeze. It worked gr eat!
Easy peezy! Plug and play in the truest sense.

Jeff
3/31/2025
Still functioning flawlessly over a year after installation. Will use etrailer products on my next vehicle.
Excellent service, perfect fit as alw ays
Perfect fit, went inline seamlessly works as good as the OEM part!
It fit like it was made for it. 10 minutes to install! Great product!thank you
Trailer has what I need on and easy to use website. Definitely my go to for truck and trailer needs
I have purchased a number of items from etrailer. They provide excellent service at a very fair price. First place I always look. This is a very nice hitch with a well applied durable finish. Easy to install.

Towne G.
8/22/2023
The wiring harness has held up well. Works great. No issues.
Very simple procedure to install on my 1997 Ford Ranger P/U. Unplug the connector to the tail lights, plug in the two plugs on the adapter and secure the wiring and converter. Took me longer to get my creeper and get under the back of the truck than it did to install the harness! Great shipping time as well.

Douglas
3/4/2026
Great so far! No issues at all.
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Broderick
10/2/2024
The harness has been working flawlessly and had extra wire incase I need to extend it or something of that nature. I have a 1996 ford ranger and it works great to tow my aluminum boat and trailer.