i have a 00 f-350 diesel and the radio won't work.nothing works on it doesn't even light up.But the other day it came on, but the volume was moving by itself and the channels would change themselves.any ideas??? i'm finding that the windshield will leak by the a pillar, causing the fuse block and or the gem module to short out. has anyone ran into this???? i've already swapped radios and nothing changed.