Hi:

So this was the problem with my car in short. There was water coming to via the passenger side air filter. The air filter is located directly above the blower motor/ resistor and some circuits. Basically all at the same time the heater and one window stopped working, and the red airbag light came on.

So far I have fixed the blower motor, resistor (thanks to hanky on this forum) and the window. I have also fixed the water leak - which was very simple and apparently a design flaw with the century. My last problem to fix is the airbag.

I was wondering if anyone had any thoughts on this as I have to idea what to do.

 

I would probably check all the fuses for corrosion and blown fuses, as well as any wires and connectors for corrosion. I'm not sure where the air bag sensors are located in the Century, but you should check all wires and connections between that and the bcm.