Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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2007 Ford Ranger
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2007 Ford Ranger
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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 directly into existing tail light connections, so installation stays simple and clean. The connectors match factory plugs for a secure fit and quick setup—no splicing or guesswork required.
This harness is designed to store inside the rear cargo area when not in use. When you need it, just pull the 4-flat out across the hatch seal. The thick weather-stripping cushions the wire, keeping it safe from pinching or damage. Because it stays inside the vehicle between tows, the connector avoids corrosion and road debris that can affect wiring left exposed under the bumper.
A powered converter isolates the trailer lighting circuit from the vehicle wiring. That means your trailer lights get consistent power for running lights, turn signals, and brake lights without overloading or interfering with the vehicle’s electrical system. It delivers steady performance so your trailer lighting stays bright and dependable.
When you’re ready to tow a trailer with brakes or need a 12-volt charge line, this harness pairs with a universal install kit to add a 7-way connector. The combination makes it simple to step up from basic lighting to full trailer control without redoing your existing wiring.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
Package was damaged and item was missing
I will be installing next to better answer these questions
Paul
9/8/2025
We have only used the wiring twice since installation. It has done what it is supposed to do. There is a little pinching where the tailgate closes on it. But so far... so good!
Easy installation
Hooking up power lead to battery was not as hard as I thought. Video was spot on. Works great--no issues
I have purchased 2 of these and they are great! The instructions were easy to follow.
Worked perfectly. Plenty of videos online on how to install this kit
This harness is the one to use for a 2021 Atlas. Works perfectly and is simple to fit. Running the live wire under the car from back to front sounds daunting but in reality is a simple task. The plugs into the lights is very easy and takes only two minutes. Overall a great easy product.
Product is good but install is not really plug and play. Be ready to run a wire from the battery through the firewall under the car to the rear tail light area. Install is not as quick as you think it will be when you order. But after all is said and done it works well and quality is good.
After installing 2 Tekonsha T-One connectors without brake light functions, this controller was a godsend. Works exactly as it should on 2021.5 VW Atlas. Brake, running lights and turn signals all work correctly with this connector without having to modify the OEM wire harness. This system is plug and play with the most difficult part being routing the independent power to the battery above the intricate plastic protector plates underneath the car.
Great product! Instructions concise and accurate. Every product I have purchase from trailer has been excellent!!
First it was comforting to speak with a knowledgable person who could provide me with the information I needed while ordering the item. Second, I was extremely impressed with the speed of the shipping process Thank You! Now while I haven't yet had the Curt T-Connector wiring harness installed as yet I have read the instructions and watched the video on the installation and it seems pretty concise and straightforward although I'll reserve commenting on that until the installation is completed. So far = So Good and couldn't ask for more at this point.
Terrible!!! Shorted out my entire car!! Ruined my cars internal computer and my car wouldn’t start!!! Worst product ever!!
Info for this part was:
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Jenny N.
2/28/2024
Oh no! I will have our Customer Service team reach out to you so that we can have the missing part replaced.