Welcome to JustAnswer.com! My name is DriveFast71(Ron) and I will do my best to answer all of your questions completely and accurately.
When the SRS light comes on, this is a sign there is a problem in the Supplemental Restraint System (aka Air Bag System). Unfortunately, there is NO way to know what the problem is, without having the "codes" read. There isn't a mechanic on the planet that can :look" at the light and say "It's this...". Every mechanic's first move will be to read the codes with a scan-tool. This can be anything from an impact sensor to a problem with the seat belts, and any number of other parts or sensors in the SRS system. Once you have these codes, you can more accurately and efficiently diagnose the actual cause of the problem, and then begin the repair procedure. You will need to find a shop that has a scan-tool that can read these codes, as most local "Free" scans or "personal" scanners do not read SRS codes. Most shops charge around $45-$65 for the diagnostic fee and the codes retrieved can be brought here, and any of our Techs can help you diagnose the problem, and even walk you through the repair if you feel comfortable. (Keep in mind, AirBag deployment is a risk in this situation, and extreme care must be taken when working on the SRS system)