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Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring. Powered ModuLite reduces strain on wiring system.
Features:
Specs:
This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies and some interior paneling to access this harness. Once you've plugged in the connector, run the red hot lead up to your car battery. Connect the included fuse holder, and then connect the fuse holder to the positive terminal on your battery.
Once installation is complete, the 4-way connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.
It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.
A ModuLite power module is built into this T-One connector. With a ModuLite, your trailer's lights will be powered without overloading your vehicle's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.
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I purchased a new 2025 Chrysler Pacifica Hybrid and swapped the Curt hitch from my previous 2019. I had to order the new wiring harness as it was easier to just leave the old one on the 2019. After I installed the hitch I proceeded to the harness. I managed to fish the drivers side with not to much difficulty but the passenger side just would not pull through the chase. I had to cut the wire and pull just the wire up to the lamp housing. I spliced the wire together with a water proof heat shrink connector. This solved a difficult pull. Is it possible to have waterproof connectors on the wires to make easier pulls? Just a thought. I will use this harness to light up my cargo basket. Great product.
The wires on the driver side from the tail light to behind a bumper were too short. I had to pull everything out and splice in additional lengths to be able to work with it
Very disappointing
I like that it has a relay and is isolated from the factory wiring and does not require any splicing to tail lights. I don’t like that it requires a power wire to be run up to the battery underneath the van. No easy or safe way to do that on this vehicle. Ended up taping into the 12v auxiliary outlet in the cargo area, a lot easier and safer.
Install wasn't bad at all. I appreciate the plug-and-play connections at the rear taillights. Fishing the wires up through the back corners of the van was challenging, but no worse than I expected. Would've liked to have had slightly longer cables from box to left taillight, and longer ground cable, so I could have had more flexibility in location of box install and ground connection.
Almost impossible to pull into left side wiring cavity. Need a whole vehicle hoist to run B+ to battery.
Recommended by neighbor. Works great and with your videos very easy to install.
Very quick delivery Pleased with my Pu rchase
Had all the needed parts. Good quality heavy duty wiring. Took longer that I thought to install because I had to lower the underside plastic shield protection to get a pathway for the black hot wire from the battery to the wiring harness. I have a 2022 Chrysler Pacifica.
Great help from the etrailer.com staff, to determine what to order and how to install it. I am very happy with my choice to use them as a source for my equipment.
Great product, exceptional quality.
Works like a charm!
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