Car wont start

Today I was replacing a 1/4 panel on a 90 5.0 and I went to start the car and it wouldn't start. I know that Ford had a kill switch that would kick in and stop the electric fuel pump if the car was hit real hard. Does anyone know where it is? Thanks, Tony
 
it is called the inertia switch; located somewhere in the trunk. if all else fails, search on that term in here (i.e, inertia switch location), and you should find some info. good luck.