only thing you can do is test the signal with a good known speaker either at the rear of the H/U or at the speakers, but sounds like a wiring problem if BOTH arent working. Is this a recent install?????just stopped????Amp????checked the balance????
Used to be my moms car its been in there for awhile and has been like that for awhile.. It had the tape and cd combo.. the cd player is at the bottom i was thinking maybe worng harness...