Where is the emergency fuel pump shut off switch located on a 1989 Mercury Grand Marquis

check in the trunk on left hand side

Remove the speakers

owner manual will yell you. look under fuel shut off or inertia switch.

it should be in the trunk behind the side carpet. Look for a yellow and black label.

fuel pump is protected by a relay. see owner manual for location.

PCM power relay powers up PCM. PCM then powers up fuel pump through fuel pump relay.

Also, check to be sure inertia switch is not tripped. In trunk. look for label or look in owner manual for info.

from autozone.com

1996 Mercury Grand Marquis 4.6L SFI 8cyl


Fig. 1: The fuel pump is located in the fuel tank. On some models it can be viewed from the side as shown here



Fig. 2: Electric fuel pump removal

The Relay - Fuel Pump is located: Under hood, driver side, front side of wheelwell, mounted in relay block.


Hope this help to solve it (remember comment and rated this).

most cars have an oil pressure sensor that is tied into the fuel system that will shut off fuel pump if oil pressure is low. Ford is famous for having a yellow fuel pump cut off switch that activates in a collision - you need to locate and check this 1st

It is in the trunk I can remember which side on a 92 but it will be behind the side trim panel almost straight down from the trunk hindge.

check the fuse .if the fuel pump was bad you blew the fuse . there is a inertia switch in the trunk or under the dash you could check . push the red button to reset relay should be under the hood in the fuse box check your book if you have one.

The fuel pump relay is under the hood in the MAXI fuse box, it is a black box with a huge wiring bundle comming out of it.