96 Pontiac Transport 3.4 fuel issue
 

I have a 96 Pontiac Tansport with 140K that ran when I parked it then never started again. I could not hear the fuel pump working and it wasn't firing so I replaced the pump, screen, and filter. Still no fuel. I checked for spark and I have that. Any suggestions? Where can I get a test diagrahm for the wiring.