CURT custom wiring allows you to outfit your vehicle with a standard connector for plugging in trailer wiring. Each T-connector is vehicle-specific and plugs into existing wiring without any splicing required. Our custom wiring is also thoroughly tested for reliability.

Of the two types of custom wiring, connectors use a single plug while harnesses use multiple plugs. The result is the same: a standard trailer wiring connection, usually in the form of a 4-way flat. Neither option requires splicing.

However, because a custom wiring harness uses multiple plugs to connect to the vehicle's taillights, it is sometimes referred as a T-connector. It Ts into the vehicle's electrical system using two or more plugs, bridging the existing connection and branching off a new connection for the trailer wiring.

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Keeping your trailer wiring connector clean is an important part of maintaining a strong wiring connection. Rust, dirt and grime can quickly build up and deter operation of your trailer lights, causing added stress and unsafe towing.

Each CURT custom wiring harness and connector comes with an included dust cover to help protect the trailer wiring connection when not in use.

A growing number of CURT custom wiring options come with potted enclosure technology. This means that the integrated converter of the harness is filled with an epoxy resin, providing two key benefits.

First, the epoxy seals off the internal circuits from water and road salt, increasing the longevity of the unit. Second, it greatly reduces vibrations within the converter, helping to protect the circuits and ensure a long-lasting connection.