tc2010

I just bought a '95 mustang convertible yesterday. I've noticed a beep every time I start the car and thought it might be the aftermarket stereo that is in it. Just to be safe I did some research and found the if a ford car beeps 5x5 times its and airbag fault code, so I went out to my car cranked and counted the beeps and, behold, 5x5 beeps. In my research I found the airbag light should provide the actual code, (now my question) my light doesn't flash. I know the light works because it comes on with all the other lights at crank and then shuts off along with them. So what it wrong and what do I need to do?