Air Bag Flashes Eight Times

:flash: My '90 Taurus Air Bag Light will not stop flashing. It will flash 8 times, then stop for a second and start again. I've have been told that there is nothing wrong with the air bag, but it is a warning that something else is wrong. Does anybody know what it might mean?

8 blinks=Primary Crash Sensor - Not Mounted to Vehicle Properly

Thanks a lot, i'll see if thats the problem!