Plug-in Simple wiring kits. No cutting, no splicing, saves time. Unplug your vehicle's factory wiring harness and plug in a Hoppy T-connector and extension. That's how easy trailer wiring is with a Plug-in Simple wiring kit. Features OEM connectors for a perfect, weather-tight fit. The kit provides a 4-wire flat connector for your trailer. Includes taillight converter. Fits Ram 1500 2002-04; Ram 2500 2003-04, and Ram 3500 2003-04.