guiroy69 Posted February 15, 2011 Report Share Posted February 15, 2011 Hello Last week I bought a GPS navigation radio THX from a Lincoln MKX 2008. I installed on my 2007 Ford Edge, everything works but the sound will not go down or up .... There is always the same level. sound boxes back does not work either! Does someone could help me please Guillaume Quote Link to comment Share on other sites More sharing options...
07CRUSH Posted February 16, 2011 Report Share Posted February 16, 2011 Hello Last week I bought a GPS navigation radio THX from a Lincoln MKX 2008. I installed on my 2007 Ford Edge, everything works but the sound will not go down or up .... There is always the same level. sound boxes back does not work either! Does someone could help me please Guillaume You have to get it reprogramed at the dealership,others have done it do a search on the forum Quote Link to comment Share on other sites More sharing options...
baum Posted February 16, 2011 Report Share Posted February 16, 2011 THX usually uses an external amp. this would cause this. Quote Link to comment Share on other sites More sharing options...
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