Just getting the bike back together and noticed that my stereo is making a hi pitched pulsing squealing noise. I disconnected the amp, the biketronics hand control box and the noise is still there. I've checked all my powers, grounds even ran separate jumpers and the noise won't go away. It's gotta be in the head unit, but what the hell happened? Anyone hear of this? I got a Sony CDX M10

 

May want to see if Ultranutz can help on the Audio forum.