On a 2000 Ford Crown Victoria :
The fuel pump inertia switch ( shut off switch ) is in the trunk , behind the trunk
liner on the drivers side ( there is an access hole )
There is just ( 1 ) fuel pump inertia switch , a fuel pump relay , and a fuse for the fuel pump relay
Yes
Yes.
where are the spark plugs of a 2000 crown Victoria
There is none as your Dodge is not equipped with an inertia switch.
On a Police Interceptor model, it is just under the oil filter.
Gm does not use inertia switches.
Yes.
Chrysler does not use inertia switches.
According to the 2000 Ford Crown Victoria Owner Guide : ( 71.9 litres / 19.0 U.S. gallons )
A 2000 Chevy Blazer is a GM vehicle. Vehicles made by GM do not come equipped with an inertia switch.
GM doesn't use inertia switches.