I found a link on this site before giving you a list of wires and what they do in the car.
It allowed you to select your car brand then model and gave you a nice table with parts and what wires they use.
Does anyone know the website address?
I use http://the12volt.com
There are others, as well. Googling would be useful in this instance. Search for AUTO WIRING DIAGRAM
Have you looked in the FAQ yet?
How about the Wiki?
Under normal circumstances, a signature would go here.
FS: VW MKIV Bezel for 8" Lilliput - 95% Finished
Please post on the forums! Chances are, someone else has or will have the same questions as you!