To stop fuel flow in an emergency situation with a 1990 Dodge Ram, you'd need to disconnect the fuel pump's electrical connection or, in a more drastic measure, potentially try to sever the fuel line (though this is risky and should only be considered as a last resort in a truly life-threatening situation and with appropriate safety precautions). Locating these requires working knowledge of automotive systems and is not recommended for someone without mechanical experience.
If you're concerned about the possibility of a fuel leak or fire, your best course of action is to:
1. Turn off the ignition immediately. This will stop the fuel pump from delivering fuel.
2. Move the vehicle to a safe location away from any potential ignition sources.
3. Call for professional assistance. A tow truck and/or a qualified mechanic can diagnose and address the problem safely.
Do not attempt to work on the fuel system unless you are highly experienced and have the proper safety equipment. Fuel is highly flammable and working with it improperly can lead to serious injury or death.
