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Wiring a trailer doesn’t have to mean cutting into your vehicle’s factory wiring. The Curt T-Connector plugs directly into existing tail light connectors to give you a 4-flat trailer connection. No splicing, no guesswork—just a straightforward plug-in setup that’s ready to go as soon as it’s connected.
When you hook up trailer lights, some vehicles need extra protection for their electrical systems. This harness includes a powered converter that draws power directly from the battery instead of the tail light circuit. It keeps the vehicle wiring safe from overloads while providing reliable power to the trailer lights every time you tow.
Once installed, the wiring stays tucked out of sight. The hidden harness design routes neatly behind trim panels and through existing grommets, so there’s no need for drilling or messy exposed wires. The 4-flat connector can be stored inside or pulled out only when it’s needed, keeping everything protected and clean.
The 4-flat connector covers the essentials—running lights, turn signals, and brake lights. It’s the standard hookup for smaller trailers, cargo carriers, or light-duty towing setups. With the Curt harness in place, you get the right lighting signals for safe, legal towing without extra adapters or rewiring.

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