I must be missing something here. It looks like I should just be able to select Bass or Treble and turn the volume to adjust the tone- it works for balance/fader. But All I get is "+C" for treble and "+E" when I select bass. Is there some secret button sequence to make the tone controls adjustable? I assume this is the standard am/fm/cassette/CD changer head end (I've had this TDI for a week) Also, the horn beeps with the remote lock, but not with the steering wheel horn button. All fuses seem ok... Ideas?
Thanks, Steve