Hopkins 40335 Towing Solutions Wiring Kit T-Connectors allow you to connect your trailer's wiring system into your vehicle's wiring system Prewired to provide right turn, left turn, taillight and on some models, the backup function The two-piece system provides for a more versatile installation as well as a simple plug replacement option if the unit ever becomes damaged Simple, 4 easy steps; No cutting, soldering or taping For Ford Explorer (2002-2004), Lincoln Aviator (2003-2004), and Mercury Mountaineer (2002-2004)