The TowSmart ProClass 7-Blade Prewired Trailer Light Wiring Connector has what you need to make electrical connections between your vehicle and trailer when towing. This connector with prewired electrical function wires saves installation time, mounts on the tow vehicle and attaches to stop, turn signals, taillights, auxiliary power, electric brake, ground,and reverse. Features a durable plastic construction that is corrosion resistant to withstand extreme weather.