Trailer Stop & Turn Signal Converter - ElectroSchematics I am wiring these to converter and then out to tail lights. Tried 3 different converters so far and cannot get power out. Keep in mind there are only two lights in total not the usual four with a typical vehicle and trailer set up. I’m guessing without the vehicle tail lights in the circuit the converter will not work.[PDF] Trailer Wiring Diagrams | etrailer Trailer Wiring Diagrams Trailer Wiring Connectors Various connectors are available from four to seven pins that allow for the transfer of power for the lighting as well as auxiliary functions such as an electric trailer brake controller, backup lights, or a 12V power supply for a winch or interior trailer lights.