CURT 57674 Dual-Output 4-Way Flat Vehicle-Side to 7-Way RV Blade Trailer Wiring Adapter with Tester

VERSATILE DESIGN. This dual-output trailer wiring adapter makes it easy to tow different trailers with your vehicle, equipping it with a standard 7-way RV blade socket while retaining use of the existing 4-way flat wiring. WEATHER-RESISTANT. This trailer wiring harness adapter comes with dust covers for the 4-pin and 7-pin wiring sockets to protect the terminals from water, dirt and corrosion. The wiring harness is also well-protected with the included slit loom sleeve. INTEGRATED TESTER. The 7-pin output of this dual trailer wiring adapter features a built-in LED wiring tester in the dust cover to ensure proper functionality of your vehicle towing electrical system. STANDARD CONNECTION. This trailer hitch wiring adapter plugs into any standard 4-way flat and can be used to connect the taillights, brake lights, turn signals, reverse lights, trailer brakes and auxiliary power (some splicing required). DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this trailer harness adapter is made from durable black plastic that will never rust or corrode