ROADMASTER 732 Brite-Lite 3-to-2 Wiring Converter

The motorhome has separate brake and turn signal lights, the towed vehicle has combined brake and turn signal lights.Then you need this: the Brite-Lite wiring converter connects a vehicle with a separate brake and turn signal system to a vehicle with a combined brake and turn system, while delivering more current to the towed vehicle's brake and turn signal lights for brighter illumination