Airbag

I am getting airbag code 12. As far as I can tell it means low battery voltage. How do I replace the battery without getting killed. Where is the battery? I have a 1996 Taurus LX.
Thanks in advance.

air bag is not some thing you mess with
code 12 either has blown fuse or bad madule

Be very careful with airbags, my co-worker has a Taurus and one day driving on the highway he leaned forward because he smelled some funny smell, like a roasted marshmallow smell and a moment later the airbag deployed in his face at 65 mph. Not a very good experience.