About a month ago I noticed that my left speakers were cutting out (going real low actually) whenever I'd hit a large bump and then they'd come back on when I'd hit another bump. I haven't got around to troubleshooting that yet, but yesterday I noticed that the backlight on my GPS screen was going from 'daylight' to 'night' background whenever I'd hit a bump?? WTF?? Yes I live in the boonies, so this is a problem. I did pull out the unit and checked the main connector and didn't see anything loose and couldn't replicate the speakers cutting out by tugging on different wires. Anyone have any ideas??

take ur door apart and look at the conectors

they maybe lose or corosion