when the key is in. the f90bt is on. when the key is out. the power is still on. i cant find a power button and tried searching but came up with nothing. please help i dont want my battery to die soon haha

The accessory (ACC) power wire for the AVIC isn't connected correctly. You have it connected to a constant source, not an ignition/accessory source.

im installing it into an audi and im not sure which wire to wire it to. would you know what a turn on wire would be for an audi? i have an 08 a3 and is not sure which wire to connect it to

I'm not sure off hand. It should be listed with the harness/adapter for your car.

You may need a CAN bus adapter that has a switched accessory power output.

You may need a CAN bus adapter that has a switched accessory power output.

+1 a lot of new car do no have a ACC wire at the radio harness, and instead get the turn on and turn off signals from the CAN bus system, so you will either need to get the correct harness(probably expensive) that has a module that can read the CAN signal and switch it over to a ACC wire, or you can run a new wire from somewhere in the car that is triggered by the KEY like a fuse box or something (this is a lot more advanced and you probably shouldn't try this if you dont know what your doing)