Wiring Problem with 2002 Dodge Ram

I'm having some problems with my 2002 Ram 1500 SLT - it seems as though something has gone wrong electrically, and I don't have any dash lights, gauges, tach, speedometer, door locks, turn signals, interior lights, fog lights - - and I think that's it.... No horn either.  Everything else runs fine - I have all power outlets, radio, cruise - upper display (temp, direction, fuel economy, etc.).

Is there a common thread here (one component) that handles all of these?  I don't have a wiring diagram - so I cannot tell.  Help - please.

I have already check and re-seated all fuses.  I have added nothing at all to my vehicle either.  It started last night - blinked a few times while driving home - then again... then finally - it went and didn't come back.

I'm thinking it's a common component (most things that are gone are on individual fuses) - but maybe they're collectively on a common component somewhere, that went bad.