• BRAKE CONTROLLER CONNECTION. This trailer wiring adapter makes it easy to add wiring for a trailer brake controller. It plugs into a 4-way flat connector and provides a standard 7-way RV blade socket with brake controller wiring components
• WEATHER-RESISTANT. This trailer wiring harness adapter comes with a spring-loaded dust cover for the 7-pin wiring socket to protect the terminals from water, dirt and corrosion. The wiring harness is also well-protected with the included slit loom sleeve
• STANDARD CONNECTION. This trailer hitch wiring adapter plugs into any standard 4-way flat and can be used to connect the taillights, brake lights, reverse lights, turn signals, trailer brakes and auxiliary power (some splicing required)
• EASY TO INSTALL. This 4-pin to 7-pin trailer adapter with brake controller wiring comes ready to plug into your vehicle or trailer wiring with minimal 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

New, Unused. See images for item condition. CURT 57186 4-Way Flat Vehicle-Side to 7-Way RV Blade Trailer Adapter & Brake Controller Wiring