2001 dodge ram will crank but won't start

When you turn your key to the on position only ( not the start position) listen very carefully to hear the electric fuel pump come on for a few seconds which is located in the gas tank. If you don't hear the winding noise of the fuel pump running...then most likely your fuel pump needs to be replaced, but first before replacing it I would spend the $10 - $15 dollars to replace the Fuel Pump Relay Module. You could get lucky and have it be the problem. Best wishes!