The 7-Way Trailer Light Wiring Connector is the quickest and easiest way to make electrical connections when hauling a trailer that has a different wiring configuration than the vehicle. The 7-way blade connector (vehicle end) is commonly used on RV trailers and connects tail lights, brake lights, turn signals and reverse lights. The single housing design mounts to your vehicle and splices into trailer wiring to provide a superior connection. It provides an ergonomic, durable plastic construction that is corrosion-resistant to withstand extreme weather. For the safest towing, ensure all functions are properly equipped.