Just need a wiring diagram link that shows all wires and possibly steps on installing an aftermarket stereo.
good luck with that.. i put a new head-unit in an old pontiac firebird.. none of the colors matched the stero harness.. the cars were all browns and whites and strange colors you dont usually see... i ended up using a volt meter to find what was power and ground and all that.. then just trial and error for the speaker wires- what was front and rear.. and right and left. just messed around for about an hour til it worked. no internet access at the time... probably would have been helpful....
I will ASSUME that someone had already cut your factory harness. If NOT, then buy a harness!! DO NOT cut the factory wires. Here you go: Constant 12V+ Red/Black Switched 12V+ Blue Ground Chassis Illumination Green/White Dimmer n/a Antenna Rear Window Front Speakers 6 1/2 Doors Left Front (+) White/Blue Left Front (-) Black/Blue Right Front (+) White/Red Right Front (-) Black/Red Rear Speakers 6 x 9 Rear Deck Left Rear (+) Yellow/Blue Left Rear (-) Gray/Blue Right Rear (+) Yellow/Red Right Rear (-) Gray/Red