I have a 2000 mc ss my battery has been draining overnight. Has been pulling the radio/amp fuse lately and the battery has not dying. Use a multimeter and read out a 1.50 amp drainage with the radio/amp fuse in. When i pull it out i get a 0.5/0.6 amp drainage. i was told that it would be the factory amp, but just recently replaced it with another factory amp. Do anyone know of the radio causing this problem?