I have a 2002 F-250 Lariat crew cab 4x4 7.3 diesel. The moment this happened, electrical problem, I lost my power windows, radio, map lights, vanity lights on visors and underwood light. All the fuses and relays are good. What happened or has caused the problem? About the radio, it has power somehow, the display is blank unless you press a button and the time will appear momentarily. That is very odd how it does that and the windows and other lights mentioned don't work.