Was going to make a trip this weekend. Before we left, i plugged a new phone of mine in to the aux jack to play some music. this was the first time for this particular phone. When i tried to play a song thru the Aux. , there was terrible alternator noise. I unplugged it immediately and decided i would just listen to radio. The alternator noise was still there and is terrible. Never had the noise before this instance. I am stumped, any ideas?