I have a problem with my car audio. I have a factory deck in my 1999 Sable which has a line-in (RCA) from the rear speakers which give a line input to my subs and amp. Recently I noticed that when I am playing my ipod through the tape adapter I am not getting all the speakers to play- namely my front door speakers. I can hear music from the tweeters but not the component speakers below. I would figure they are blown but they work when I am playing my CD changer or my radio. Checked the ipod and nothing has changed in the settings. Checked the Fader, nothing changed there. What is going on?