I bought my fit used and it had the wiring already hooked up and everything. The person before me must of just disconnected the amp and subwoofer and left everything else. I originally wasn't going to install a sub/amp but I was recently given both and I guess why not install it. Problem is, I have NO idea what I am doing or even if it is the correct wiring. Can someone help a NEWB out? Greatly appreciated (Pictures of what I have below)

 

The Redwire 12v power The black wire Ground And the blue Wire Remote on and off And the red and white RCA Just look at your amplifier And connect

 

This guys youtube channel has a TON of videos on various topics you should be able to find one in there to help you do this.

https://www.youtube.com/user/CarAudioFabrication/videos