VEHICLE-SPECIFIC: This vehicle-trailer wiring harness is designed for 2004-2010 Toyota Sienna. OEM-compatible connectors to plug into your vehicle's wiring harness, located behind the driver and passenger side taillight housing. STANDARD CONNECTOR: This plug-in 4-flat trailer wiring can be used to connect trailer tail lights, brake signal lights and turn signals. Standard 4-way trailer light wiring is popular on a variety of trailers, adding versatile towing options for your vehicle. The 4-way connector will be stowed beneath your vehicle, near the trailer hitch, when installation completed. EASY TO INSTALL: No cutting or splicing factory wire. Plug and play harness. This trailer wiring harness kit plugs into existing factory wiring on your vehicle and equips it with a standard, rear 4-pin trailer wiring connector for plugging in and towing a trailer. DUST COVER: To promote long-lasting use and weather resistance, this 4-pole trailer lighting wire harness for 2004-2010 Toyota Sienna. Comes with a tight-fitting rubber dust cover. It easily fits onto the 4-way flat connector when not in use, protecting it against the outdoor elements. PACKAGE INCLUDED: Custom 4-Pin Trailer Wiring Harness*1, Zip tie*6, Screw*1