Audio Systems: Radio Wiring Color Code, saturn sc2, sc2 coupe

Question
My friend tried installing a new radio in my 97 Saturn SC2 Coupe and instead of getting the proper wiring harness, he cut the factory wires and tried to splice them. Obviously this didn't work because he mixed up the wires. There are two dark greens, two dark brown and two yellows. Does anyone know the actual wiring color codes? I found a pdf file on the installdr.com but it doesn't address the dual color problem. If I can't get the wires correct, is it possible to get new factory wires with the connector attached from a dealership? Please help!

Answer
use the pdf files to find the power wires and ground
the yellows and browns are speakers wires you can open the trunk and look at the speaker to see the colors
take a aa battery and test two wires at the time and twist them together  unitl you have all 4 speakers


http://www.installdr.com/QuickWiring.html