8g galant stereo install help!
Alright so i m a newbie here but i have used the search function but cannot find what i am looking for. I just bought an 03 Galant with the Infinity sound system with the amp. I bought an aftermarket head unit and when i removed the old one, thats when i realized its not as simple as just connecting the harness from the car to the harness i bought and attatched to the stereo and antenna. Is there another adapter for me to buy so that i can connect the aftermarket head unit to the stock amp and speakers? Any help or guidence in the right direction would be appreciated.