I have a 2006 F250 with the 5.4 and 65K on it and it has electrical gremlins! This is a plain Jane model with none of the bells and whistles. The problems show up after it rains or when the humidity is high. Truck can be locked or unlocked and the key is nowhere close to it and the dome light, radio, key chime, and or the odometer will turn on and off randomly and not all at the same time. I took it to the local dealer and they said it was a bad gem module. Had them replace it and they told me they couldn't see any signs of water damage. Put it back in garage and about two weeks later I caught it doing it again!! Thought maybe a door light switch was bad and changed them out but that did nothing. Has anyone out there ever had problems like this? Any help would be much appreciated! Sorry for long post. Greg

 

Welcome to FTE.

The usual culprit is a leaking windshield seal.