if it is the same as my 97 it is in the trunk on the drivers side.
The 1986 Mercury Marquis does not have a fuel cutoff switch. The fuel pump does have a fuse, of which could render it as nonworking.
On a 1996 Mercury Grand Marquis : The fuel pump shut off switch ( inertia switch ) is in the trunk , behind the trunk liner on the drivers side of the trunk , near the drivers side rear tail light ( there is an access hole )
In the fuel tank.
where is the fuel pump shutoff switch for a 1996 mercury mountaineer
its in the trunk
in the event of a collision the fuel pump is turned off
On a 1996 Mercury Sable : The fuel pump shut off switch ( inertia switch ) is in the trunk , behind the trunk liner on the passenger side ( there is an access hole )
On my 1998 Grand Marquis, the fuel shutoff swith is located on the left sidewall of the trunk. Push the button to reset.
on my 96 grand marquis its on the driver side uder the car right below the back door
On a 1993 Mercury Grand Marquis : The electric fuel pump is INSIDE the fuel tank
On a 2004 Mercury Grand Marquis : The fuel pump shut off switch ( inertia switch ) which has a reset button on top is located : ( in the trunk , behind the trunk liner on the drivers side , near the drivers side rear tail light , there is an access hole )
In the fuel tank