Fuel Pump 101

I have a 96' 5.7L I purchased knowing that whenever it rained , a day later it wouldn't start until what ever the moisture interupted dried out.I suspected no spark but using my timing light aas a spark tester it appeared I had spark. So I went to fuel next. When I turn on the ignition I didn;t hear the fuel pump whirring for 2 seconds as my shop manual implied. I went to the fuel pump relay and had a good ground to one side of the relay coil but no 12v to the other side. According to the schematic, this comes directly from the PCM. I haven't metered out the dark green/white from the relay to the PCM yet, but I would think the fuel pump prime thru the n.c. relay contacts should prime the pump for initial start-up. I guess I'm asking the question, am I going about trouble shooting this problem the right way?

Sounds like it. You should have 12v into the relay and 12v out during the prime event.

I have had the Same issues , I had just got gas and as soon as i pulled out into the intersection my venture stalled, its been two weeks now i have replaced the fuel filter and check fuse also both are new now , but i get the feeling that the fuel pump is not working , it has been raining and snowing alot , how hard is it to change the fuel pump?? can anyone suggest anything else??? what is and where is the fuel pybass plug ?? i seen on another forum to check that ?? I need help christmas is going to suck if i have to go by a new van :banghead:

I have had the Same issues , I had just got gas and as soon as i pulled out into the intersection my venture stalled, its been two weeks now i have replaced the fuel filter and check fuse also both are new now , but i get the feeling that the fuel pump is not working , it has been raining and snowing alot , how hard is it to change the fuel pump?? can anyone suggest anything else??? what is and where is the fuel pybass plug ?? i seen on another forum to check that ?? I need help christmas is going to suck if i have to go by a new van :banghead:
You are in the wrong forum, please post a new thread in the proper forum for your van, thanks.

Fuel pump was the problem, just finished replacing the fuel pump and fuel tank sending unit. Truck started right up! many thanks to all contributers.