The fuel pump relay is located in the Power distribution Box up in the front driver side of the engine compartment.
There is also a fuel pressure regulator in the system. I'm not sure where the regulator is in relation to the fuel filter but if it is before the filter, a clogged filter may be the problem. If this is the original fuel pump...it may be time to drop the tank and install a new one. Our van is a 2001 but basically the same set-up After the rain stops today I'll take a look underneath. I'll find a manual w/wiring diagram and scan it thisafternoon.