looking at replacing speakers.....there are 6 speakers-doors, back seat and rear hatch.
back seat are not working. And the wiring diagrams on only show 4 speakers. Any help?

 

im guessin that u have a bose or monsoon system correct? well if that is the case you probably have 6, 6 1/2"speakers. I would look at only replacing four of them. the ones in the front and back seat. I say this because most aftermarket headunits only support up to four speakers. however it sounds like your back speakers have a short in the wiring somehwere. id pull up the side panels and see if you cant find where its making contact