Here is an update on what I've done so far.
Disconnected and cleaned both driver and passenger seatbelt connectors under the seats.Removed the Passenger side airbag switch.I put a 9volt battery across the connectors of the bulb and it lit.So I'm figuring the bulb works.Just not as it's supposed to in the system? I checked all fuses both under the hood and in the truck all good.Is there anything else I can try? Airbag light still stays on solid.No flashes and no audible tones? Tried my Innova OBDII scanner but shows no codes present.
Thanks.

__________________
2003 Ford Ranger XLT Ext Cab