ok i just had my custom stereo put in today. when i noticed that my car's air bag light had turned on.. anybody know how to reset the light or know why the light would turn on? the installer said the only thing he did was disconnect the battery but i dont think thats the reason.

 

Search and you will find how to reset it.

You basically turn the ignition on for ~7 seconds and back off a few times. There are more details on how to do it.