Installing a car stereo. Speakers?

[billbernard@sbcglobalenet]

Thanks to designkidcom for the help earlier. Now there is one wire left, it's a black/yellow wire no juice to it. The memory, illumination lights are working. I have six speakers total, four out of the five speakers are working. However, the one on the left and the right are not working. The dashboard and the back speakers are working. I'm thinking the black/yellow wire would go to the left and right doors negative speaker wire. That's just a guess. Any more solutions?