Please Help, Radio Experts

[R1store]

So I am pulling my hair out. I bought an 06 sport 2 months ago and 3 days after I received an aux audio plug from eBay that the used car salesman told me to buy. Well when I plugged it in my radio quit working and all lights went out except the marking lights. The weird thing is the radio turns on when I turn on the key but only for 20 seconds. Then shuts off. (Can still be controlled thru steering wheel.

Well after purchasing a new radio and amp I am still without a radio. So it's neither of these. What else could it be?

Below is a photo of the plug that lead to my problems.

https://www.dropbox.com/s/fzlj5gbor0...%20PM.jpg?dl=0

[AV8R4AA]

I know what is going on.
Check fuses in back right fuse panel.
I remember fuse 72 or 73

[R1store]

Yup, your the man! 350$ invested and it was a damn fuse

[Bayerische Motoren Werke]

I believe there is a fuse in the back of the radio as well.
For that , you will need to pull the radio out.