Curt custom wiring provides everything you need to connect your vehicle's electrical system to a trailer. With plug-and-play connectors, a custom wiring harness easily integrates with your vehicle to provide a standard trailer wiring connector, typically in the form of a 4-way flat. This custom wiring harness also comes with a powered converter and all the necessary wiring components for a complete installation. CURT taillight converters are built with surface mount technology, offering maximum light intensity, minimum heat generation and durable performance, even under heavy vibrating conditions from towing. CURT converters are also fully tested to ensure reliability and consistency in operation.