Where is the shut off switch located?

Hello, are you referring to the Inertia Fuel Shut off switch? If so, they are on the passenger side below the glove box, usually mounted to the right side, sometimes under the footwell plastic cover. But some are visible without having to remove anything. It will have a push button on it for resetting it. I unplug them for disabling fuel pressure. Because they are in series with the Fuel Pump.