Here is the wiring:

LF DOOR (+) = GRAY/PURPLE  /  LF DOOR (-) = DARK GRAY/YELLOW 

RF DOOR (+) = DARK GREEN/PURPLE  /   RF DOOR (-) = DARK GREEN/YELLOW 

LR DECK (+) = DARK GREEN/TAN  /  LR DECK (-) = DARK GREEN/GRAY

RR DECK (+) = DARK GREEN/BROWN  /  RR DECK (-) = YELLOW/GRAY 

RIGHT DASH (+) = GRAY/DARK GREEN  /  RIGHT DASH (-) = GRAY/LIGHT GREEN

LEFT DASH (+) = GRAY/ORANGE  /  LEFT DASH (-) = GRAY/YELLOW

SUBWOOFER = RIP IT OUT / USELESS! The louder you listen, the lower it goes. Steals power from here, to power your other speakers. That's why you don't feel the bass at higher listening levels. Distorts easily too.

Below, you need a high power converter to add amps. There are two available that I am aware of: JL Audio Cleansweep / (I'll post when I find it)

Dash and rear deck signals from the factory amp are full range and work great to convert from high level to low level RCA's. (4 Channels)

Door signals from the factory amp are mid bass only and run at a flat 90hz's. (No good to run 2 or 3 way speakers)

Noise in your system? Find a better ground, and not to the battery either! (Ground loops)