To be certain, you should:
* Consult your owner's manual: This is the most reliable source of information for your specific vehicle.
* Use a repair manual: A Haynes or Chilton manual for your year and model will have diagrams showing the exact location.
* Search online: Searching for "[Your Engine Size] 1994 Dodge Ram Fuel Filter Location" on YouTube or image search might yield helpful results showing pictures and videos.
Don't attempt to change the fuel filter yourself unless you're comfortable working with fuel systems. Fuel is flammable, and improper handling can be dangerous.