I am having a wierd problem on a 2000 DTS. Dashboard lights up, but door locks, windows, trunk release and all electrical functions do not work. The car won't start, but if I turn on the lights, they work fine. Battery shows green light, so it should be fine. Lights are bright so that also indicates the battery is good. No fuses blown that I could find, but not sure if there is one that would cause this. Help!