i've tried to tap the rca module . amp recieve signals. but is weak . and the sub just whispers sound soft kine. i followed the wires and everytihng but no work. help. does anyone have a full diagram of the wires. and how do i get to the subwoofer. and the amp. actually where is it.

 

If it is done the way i think its done, all u have to do is go to AUDIO section ont he NAV and chage ur DSP mode to rear seats

Your Bass should kick in.