Where is the fuel cut off switch on 1992 Buick roadmaster?

There isn't a readily accessible, easily identifiable "fuel cut-off switch" on a 1992 Buick Roadmaster like you might find on some other vehicles (e.g., a readily accessible button or switch). The method to stop fuel flow in an emergency is to disconnect the fuel pump's electrical connection. This usually requires going under the car and finding the fuel pump relay in the fuse box (often under the hood, but sometimes under the dash) or tracing the fuel pump wire and disconnecting it.

Important Safety Note: Working under a car is dangerous. Always support the vehicle securely on jack stands before working underneath. Disconnecting the fuel pump wire may also involve working with potentially hot components, so exercise caution and allow any components to cool down before working on them.

To find the fuel pump relay or wire:

* Consult your owner's manual: The best place to start is your owner's manual. It may show a fuse box diagram that pinpoints the fuel pump relay.

* Online resources: A Haynes or Chilton repair manual for your specific vehicle year and model will have detailed diagrams and instructions. Search online for a wiring diagram for a 1992 Buick Roadmaster.

* Professional assistance: If you are uncomfortable working under the car or tracing wires, seek the help of a qualified mechanic.

Remember that disconnecting the fuel pump is a last resort for emergency situations. It's not a normal way to turn off your car's engine.