Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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2014 Chrysler 300
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2014 Chrysler 300
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Wiring a trailer often means tracking down factory wires and hoping you splice into the right ones. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector skips all of that. It plugs directly into the vehicle’s existing wiring for a true plug-and-play setup. No cutting or guessing—just connect the T-Connector and you’re ready to hook up your trailer lights.
Many vehicles don’t have enough power in the tail light circuit to safely run trailer lights. This harness uses an integrated powered converter that draws 12V power directly from the battery, giving the trailer lighting its own clean power source. That means steady, consistent signals for running, turn, and brake lights without overloading the vehicle’s system.
The harness includes a dedicated power wire that runs straight to the battery, away from hot or moving parts. This setup keeps things safe and ensures the converter always has a solid 12V feed. It’s a proven method for clean installs that last, especially when you route the wire using one of several standard paths up to the battery.
Once installed, you get a 4-flat connector that handles everything you need for standard trailer lighting—running lights, turn signals, and brake lights. It’s the common connector used on most small and mid-size trailers, so you can plug in and go without needing adapters or rewiring.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to take a look at the Curt T-Connector Vehicle Wiring Harness with the four-way flat trailer connector. This is a custom fit part. It's designed to fit the 2017 Hyundai Ioniq Hybrid. On a custom fit part, I always like to recommend for you to go to our website, use our fit guide, put in your year and model vehicle, and it'll show if this will work for your application. This harness will provide this four-way flat trailer connector to the back of your vehicle to power your trailer's signal lights. This is compatible with five-pull, six-pull, and seven-pull adapters that we sell on our website. This harness does connect very quickly and easily.
Basically, you just locate your connection points in the rear cargo area, plug in these t-connectors - one on each side. One on the driver's side and one on the passenger's side. Ground your white wire and then run your power wire to your vehicle's battery. This harness does include this tail light converter, this black box here. This is to ensure that your vehicle's wiring will match that of your trailer.
It's a power module so it connects directly to the battery to avoid overloading your vehicle's electrical system. This is constructed using SMT technology, which is surface mount technology. This will give you a more consistent and reliable performance. It helps maximize your trailer light yield and intensity while producing minimal heat and it will ensure superior operation in any rough road conditions. This also comes with this nice dust cover for the four-way so what's nice with that is when you have this installed on your vehicle, you can install the dust cover and you just put it on and then when you're not plugged into a trailer, it'll protect those terminals from any damage from the elements. These parts are made in the U.S.A. A few specs on this - the maximum amp reach on the stop and turn light circuits is 3 amps per circuit.
On the taillight circuit, it's 6 amps total. Now it does come with a nice set of detailed instructions and it'll describe how to install everything and even give you good pictures on where your connections are made. Simply, when you go to install this, what you want to do is go to the rear of the vehicle, the rear cargo area, and then you want to locate your connection points, which are on both sides. On the driver's side you want to start. Take this t-connector with the yellow wire in it. That's for the driver's side and then you unplug the connectors in your vehicle.
Plug these in there. You have the white wire with the eyelet on it. That you want to connect to good clean ground if there's one nearby. If not, they give you a screw that you can make your own ground. Then you'll take your other t-connector and you have this length of green wire here. This is for the passenger side. Run this all the way over to the passenger side. Same way. Plug this into the connectors on that side. Now your converter here, this black box, you do want to attach that to a nice flat service so it doesn't bounce around. They do include this piece of double-face tape that you can use to attach it down and then run your bonded wire for your four-way all the way out the back. Then your last wire is this black power wire. This needs to run up front to the vehicle's battery so they do include this length of wire to do that and the connectors. You take one of your butt connectors, put it on the power wire, connect it to the one end of the wire, run this all the way up to the front. When you get to the front, you don't want to connect this directly to the battery. You want to run it through that end-line fuse holder. Take your other butt connector and connect it to one side of the fuse holder just like that. Then your other side of the fuse holder, you want to take this eyelet connector and install it and then connect this to the battery at the front of the vehicle. Once that's all connected, pop it open. Take your included 10 amp fuse. Install it into the fuse holder. Put your cap on there and then your system will be all ready to go. Now they do include some extra cable ties to take up any slack in the wiring. If any wiring is hanging down, you can zip it up with the cable ties and your system will be all ready to go. That should do it for the review on the Curt T-Connector Vehicle Wiring Harness with the Four-way Flat Trailer Connector.
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