not sure on this srs system as it is the older. most systems once used the box that does the thinking must be replaced or sent in to have reset. the dealer will only replace it. other sub systems like the g load sensor is a 1 time thing as it breaks. This is IF it was in a wreck, bags deployed. was it?
you can get the crash data from the system IF it was used, meaning a wreck that IT deployed the airbag system.
if any wire to system or sensor is bad that light will light. any part missing ect....
more cars are totaled after a wreck because of the cost of repairing these system is on top of normal repairs. the newer the more these things cost. just say a front set of bags, dash, belts and related part can easily get onto the thousands. new cars have a set belt with a explosive charge too. once used its toast.