1995 C280 stereo problem

[rbunc]

I have a 1995 C280 with the Bose stereo system. The rear door and deck speakers are not working. The front speakers are fine. I have checked all the fuses I can locate (front and rear fuse boxes and in-line fuses at the amp in the trunk). When I fade to the rear speakers, the front speakers fade out and all I can hear is the center deck speaker. No sound at all from the two door speakers or the two rear deck speakers. Does this system use a seperate amp for the front and rear speakers? Can anyone provide me with a wiring diagram? Any help would be appreciated.

[Hokke]

Hope this helps (http://koti.welho.com/hpietari/Bose.pdf)

[rbunc]

Thanks for the wiring diagram.

[SLAMMED_C]

Im gonna say its your bose amp. I have heard of seperate chanels going inside of the amp..
I know of someone that the passenger front door speaker went out on him.. checked the speaker and it turned out to be the amp.