I know there are threads on this topic, but I do not believe they address my particular question.
I have an aftermarket stereo (original owner installed). This said, as I understand there was a 10 speaker option, which I believe is what I have (either way I have six in the front, 3 on each side). My problem is that my front passenger side door tweeter as well as the dash tweeter are out; the one in the passenger footwell, as well as rear rights still work. I have taken out the speakers and checked them, they work. I have a couple of amps mounted on either side of a subwoofer that is in the trunk, and doing my best with mirrors and flashlights they all appear to be plugged in and working (no contacts are noticably dirty or appear to be on need of cleaning that appeared to help in other cases). I have also pulled out the rear seat bottom to see if there were any noticable pinched or broken wires (there weren't, but I would expect the problem to be there, since the rears work).
My guess is there is a problem with the wiring between the head unit and the two front speakers. My problem is that I can not figure out how to pull the head unit out of the dash, and I am not sure I want to try, as I may make a bigger mess of the situation. This said, I would like advice as to how best to try and access this area (my lame Chilton's book, says "1. Remove the steering wheel, and 2. Remove the dashboard"...or something about as helpful as that).
So if I am to try to access this area, is the best route by removing the dash, if so how? Or can I access these speaker wires through the glovebox (I have removed the glovebox in my previous E46, so if I can contort myself again I can try that, though any tips doing this in the E34 are appreciated), or might I be able to access via the firewall (under the hood), close to where I have replaced the mircofilter in the past?
Thanks in advance for any advice.