TRAILER SYSTEM AND METHOD FOR MODULATING SIGNALS FROM A VEHICLE TO A TRAILER

A system for transmitting lighting signals from a vehicle to agricultural equipment being towed by the vehicle. An improved trailer lighting system and method uses an improved wiring harness converts output from a standard 7-pin vehicle connector for use in activating agricultural equipment lights through a standard 7-pin agricultural equipment lighting connector. When the vehicle brakes, the harness recognizes increased voltage flowing through the turn signal connectors of the vehicle and activates the brake lights of the trailer in response.