Stereo Antenna Harness Adapter for Installing a New Radio Into a Honda, Accord, 2008, 2009, 2010, 2011, 2012 Antenna adapter for installing a new Radio into a HONDA ACCORD 2008, 2009, 2010, 2011, 2012 CarXtc adapter plugs directly into the antenna wire beyond the radio found in a ACCORD Plugs directly into your vehicle radio antenna harness behind the factory radio. Blue wire connects to the amp/antenna wire on the radio's harness Antenna adapter is needed for your HONDA ACCORD 08, 09, 10, 11, 12 If installing an FM modulator you will need this and the reverse antenna adapter