Hello everyone ! I have an xc90 07 I have successfully installed an amp and sub Into the car with the factory system ! I'm only having one problem and I hoping I can get help here, I cannot get the amp to turn off when I'm done listening to music and turning off the car so it's killing my battery , is there a fuse in my trunk that I could tap Into for the remote wire for the amp to turn off and turn on with the key ? Or any idea similar to that would work?!

Thanks in advance