All I can say is get a DVM and start checking continuity. The speakers should be around 8 ohms so if you set all the volume controls to max. You should read 8Ohms across the coils. Once you find them you could change one of the volume controls and see if the resistance changes that would tell you which leg of the speaker goes thru the controls. Without a wiring diagram you have a tough way to go......
I am in the process of buying a new receiver. Here is some background. My house was wired and some speakers were installed. My working speakers are as follows-- in family room 2 speakers in wall and 2 speakers in ceiling( I think these are consider the rear speakers if I were to do surrond sound) then my kitchen has 2 speakers. I have a volume control in the family room and another one in the kitchen. My family room and kitchen are one big open space. I am not interested in hooking up for surround right now-- I just want to be able to have equal volume in all the speakers. I am assuming that the rear speaker will not even have to be hooked up-- but not sure on that.
Now today I was looking at all these wires coming out of my wall and I got terrified. I have set up my steros in the past but this seems very complicated. I guess what is throwing me off is that a few of the wires have a red,black,green,and white wires. What the heck are the green and white wires for and where do they go on the reciever? I am thinking they have something to do with the volume controls switches but not sure. Can someone please help me.