When the bike gets wet by heavy rain or wash, the radio will start playing. No display is on. I can push the ON button, and the display will turn on, and I have control, but I turn the radio OFF and it still plays. I pull the fuse, and it still plays. This will last until the bike thoroughly dries out. This happens with the key in all positions. I have to disconnect the battery lead to silence it. Anyone come across this problem? Solution? Sounds like a short, but the fuse-pull is a mystery!