Where is the fuel pump shut off switch on 1998 Lincoln navigator?

The 1998 Lincoln Navigator does not have a readily accessible fuel pump shut-off switch like some other vehicles. There's no easily located button or switch inside the vehicle. The fuel pump is controlled electronically, and shutting it off requires disconnecting the fuel pump relay or pulling a fuse. This should only be done by someone experienced with automotive electrical systems and is generally not recommended unless absolutely necessary in an emergency situation (like a fire).

To disable the fuel pump, you would need to locate the fuse box (under the hood, usually) and the fuel pump relay (location varies; consult your owner's manual). Pulling the appropriate fuse or relay will disable the fuel pump. Be aware that this will also disable other vehicle systems that rely on that fuse or relay.

It is strongly advised against attempting this unless you have the proper knowledge and are dealing with a serious emergency. Improperly working with the electrical system can cause damage to the vehicle or even injury.