We traced the noise to a small red plastic canister? Tube? that was connected to the master cylinder by two sires, a red and a black.. Don't know what the red plastic thing is or does. It looks like a cheap plastic checker with a small hole in middle, there appears to be a silvery plate inside the red thing that moves and creates the ringing. Clipped the wires and ringing stopped with battery connected. Now engine wont start, won't even turn over. All lights and elctrical working and no ringing.