Stereo Wire Harness Mercury Mountaineer 06 07 08 09 10 2004 2005 2006 2007 2008 2009 2010 (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 Includes factory subwoofer retention harness- some vehicles might have the subwoofer pop noise during on and off of system that might require a step down resistor sold separately.