Shop Nilight 4 Pin Trailer Wiring Harness Kit 56329 Vehicle Custom for 2004 2005 2006 2007 2008 2009 2010 2011 2012 Ford Escape Edge Freestar Mazda Tribute Mercury Mariner Lincoln MKX in high quality. 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.