1987 Silverado 350 V8

my trucks starter shorted out about 3 months ago and i changed it but then my fuel pump wouldnt work so i changed it and then i changed the relay and it still wont turn on but when i hook it to another battery with jumper cables it gets power. I check the wiring to the pump and they still have power. That is a short explanation of whats goin on i just need help getting it running please help me