to I ve just instaled my new radio Pioneer Appradio... very bad but i bought it for $130...
So I cut the connector from the factory radio and I found on the 2 wires RED/ORANGE 12v even without the key and even on ON or ACC and my wonderful Appradio don't have a switch to stop him so I will be obliged to put a little swittch on the dashbord and of course never forget to stop him.
Is that why I have an axxess box behind my radio connected to the harness?
Yes sir, that little box "understands" your CANBUS system and translates the signals over to the radio. The box typically depending on which model you purchased will do Retained ACC Power (RAP), parking brake, reverse signal and sometimes VSS (mainly GM vehicles)
Always wondered why i had a birds nest behind my headunit. When i first bought my car i didn't know much so i had it professionally installed. But that was 3 headunits ago lol. Its pretty hard to fit the double din in with all that lol