Were is the fuel pump shut off switch for 1998 ford explorer?

There isn't a readily accessible, manually operated fuel pump shut-off switch on a 1998 Ford Explorer like you might find on some other vehicles. The fuel pump is controlled electronically by the PCM (Powertrain Control Module). In the event of a crash, the inertia switch (also called a crash sensor) will cut power to the fuel pump. This switch is typically located in the passenger compartment, often under the dashboard on the passenger side.

To disable the fuel pump in a 1998 Ford Explorer, you would need to disconnect the electrical connection to the fuel pump itself (a more involved procedure that requires working under the vehicle), or remove the fuel pump relay (this location varies by year, you'll need a repair manual or online forum to find it's precise location on your specific model). Disconnecting these components should only be attempted by someone with mechanical experience. Incorrectly disconnecting components can cause damage to the vehicle's electrical system.