Sometimes while driving my car the radio will cut out and the lights will dim really low. Then when the radio turns back on all the radio presets are erased and all the bass/treble settings are gone. Could this be a sign of a dying alternator or maybe a bad ground somewhere? I was thinking a short at first but no fuses blow. The past two times it has happened, it was raining. Thought I'd throw that out there and see if maybe that could be a cause.