1995 Mercury Sable GS wagon air bag dash warning light has started to continue flashing after car is running and being driven. Light goes out for a short period of time then flashes 2-4 times and continues this off--flashing 2-4 timesoff for the entire trip. Any ideas for a do-it-yourself job or am I to head for a garage? Also, is anything bad likely to happen if this is not taken care of soon (or at all)?? Thanks, J.P.