Universal 2-to-3-Wire Tail Light Converter by CURT®. Converts 2-wire system to 3-wire system. Turn and Brake Circuits: 2.1 Amps Per Circuit. When your vehicle does not readily provide an electrical connection for hooking up your trailer, CURT electrical converts offer the solution. Working tail lights on your trailer are absolutely essential any time you tow, and a converter provides an effective way to properly equip your vehicle for safe towing.