-check fuse F60 (7.5amp) behind dash on left side near your left knee. That powers the module under the console. There is also a ground wire down there for the other side of the power circuit.
-The "clockspring" in your steering column will throw airbag warning light if it has gone bad. It is a thin printed circuit on flexible film, it's appearance is like a wound clock spring.
-There are sensors to see if you are sitting in the seats
-There are sensors to see where the seat position is
-There are sensors to see if the belts are buckled
-There are wires going to the seatbelt tensioners
(if any of those sensors is disconnected or has a broken wire, warning light will come on)