Stereo Wire Harness Mercury Mariner 08 09 10 11 2008 2009 2010 2011 (car radio wiring installation parts) Aftermarket Radio / Stereo Installation Wire Harness Connects directly into vehicle harness (minimum or no cutting or splicing of factory wires) Professional wiring harness (EIA color coded to match the aftermarket wiring) Might require manual connection of the ignition power wire on some vehicles Designed for factory non-amplified systems. Should also work with factory amplified (separate harness needed to retain factory sub if equipped)