None of the audio/video RCA connectors as well as 12V power outlet in the central console seemed to work when I got my 2008 sedan. I looked up and changed the fuse for the 12V outlet and it's back to life. But I'm totally clueless about how to approach the RCA ports.
Is there a fuse somewhere like on the back of the stereo (non-Bose)?
Alternatively, should I take the console out and inspect the cable connections?

Thank you,

 

There should not be any fuses that is in between the RCA and the radio connection. If you have a multimeter measure the resistance of the two contacts in each RCA (inner socket and outer contact). The yellow one (video) should be 75 ohms (its a standard) and the other two (red and white) should probably be in the 4K ohms region (could be wrong on this). If you read a open circuit then its either a bad connection or bad radio/blown input protection.