The Wesbar 4-Way Trailer End Wiring Connector is a perfect replacement for your old, worn-out, or damaged trailer plug. This harness transfers lighting signals from the vehicle to the trailer. The molded end ensures a watertight connection with no chance for water to get inside. It contains a 4-way plug with the following functions: White: GroundBrown: Running LightsGreen: Right Turn/Stop SignalYellow: Left Turn/Stop Signal Molded connector keeps out water | Tow Ready Wesbar 4-Way Trailer End Wiring Connector 8