well, according to the manual, if you dont have a seperate amplifier (if you have a cd player or premium sound you have the amp) the colors are as follows: haynes doesnt indicate polarity + / -, but when i wired it, i did it consistently, i.e. the wire towards the top of the page on the manual was the positive. anyway, here goes.
Front Driver
White/Black
Brown/Yellow
Front Passenger
Brown/Red
White/Red
Rear Driver
White/Violet
Brown/White
Rear Passenger
White
Brown