How do you change a fuel tank on a 89 Ford Festiva?

To change the fuel tank on a 1989 Ford Festiva, first, ensure the vehicle is safely lifted and supported. Disconnect the negative battery terminal, then drain the fuel tank and remove the fuel lines, electrical connections, and the straps holding the tank in place. Carefully lower the tank and replace it with the new one, reattaching the straps, fuel lines, and electrical connections, before reconnecting the battery and testing for leaks. Always consult a repair manual for detailed instructions and safety precautions.