wire color codes going to radio

How can I find the wire color codes going to the radio? I bought a new alpine radio and i need to know what is the purpose of the wire coming from the car? there is around 10 or 11 wires. thanks.

i am looking for the wire color codes for the 1995 g20

Look here http://www.npoc.co.uk/tech/wiringdiags.asp

G20 should be the same..

hi thanks for the wiring diagram. youve been a big help

Look here http://www.npoc.co.uk/tech/wiringdiags.asp

G20 should be the same..