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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.
Features:
Specs:
Installation
This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the tail light housings. You will have to remove interior trim paneling to access these connection points. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to 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 tail light converter is built into this T-connector. This converter is a circuit-protected, battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.
Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.
Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.
Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.
Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.
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Hooked this up on our 2025 Toyota Corolla Cross hybrid. I really like how this harness connects to the car’s wiring through plugs in the taillights. Biggest challenge is running/securing a controller power wire to your car’s battery. But with this particular vehicle, starter battery is in the back. Nice!
Everything arrived in a box in good condition and timely and i didn't even open it. Just handed the box to the installers and everything they needed was inside the box. Very satisfied.
We installed a hitch at the same time as this connector kit. It was pretty easy but do recommend having a 4 pole flat tester to plug in if you don't have actual trailer lights to test the setup before the bumper cover goes back on.
Very good product, perfect fit and easy installation.
Plug and play 100%
We installed this wiring harness while we had the bumper cover off to install the Curt towing hitch for the Corolla Cross. That made installing the harness a breeze. We simply zip-tied the cables to already existing wiring, slipped the hot wire to the battery (in the hatch on the hybrid Corolla Cross) through the rubber grommet under the right taillight, and brought the four prong trailer plug down right alongside the hitch. We tested all the car and trailer lights before reassembling everything, and they all worked perfectly. Note we have the Corolla Cross Hybrid SE, which does not have LED taillights.
Both the heavy hitch receiver and wiring kit came nicely packed, undamaged with all parts necessary. Installation, while a bit complicated to remove the plastic trim, is straightforward on my Toyota Cross, a simple bolt-on swap with the factory steel bumper, eight bolts, and a small trim before reinstalling the plastic cover.
Great product and best price found after shopping around. Items were delivered quickly and professionally wrapped. Obviously this company cares about their customers. Kudos you have a new customer for life.
Item worked well. Was able to run all wiring inside my 2022 corolla cross L AWD
Perfect
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Jake
6/26/2024
1 year later - still works great. Happy with the product.