I have a full aftermarket system all hooked up and everything sounds great but i have had one problem with 2 diffrent hu's so i know it is something with the car not my head units. I have no memory it is like after 10 or 15 minuets my car goes into a "sleep mode" or something. I can get in like five minuets later and my settings and presets will still be programed but if i wait a while everything resets back to default settings . Is there some sort of adapter i need or something? I've already tried running a constant 12v wire as the power source but still same thing . Oh yea and if this helps any i sat by my car to see what happens after 10 min or so and at about that time margin 10 to 15 min after i turn the key off i can hear a click noise by the fuse box under the hood like something is shutting off. Maybe the car thinks that it is draining my battery or something becuase i belive i have no power after that point like for car phone chargers ect. that should stay on after the car is turned off right? PLEASE ANY HELP ????