1998 Dodge Caravan NO POWER

I REPLACED THE OLD FUEL PUMP, SPARK PLUGS AND COMPUTER BOX AND STILL DON'T GET ANYTHING. THE CAR STILL WON'T START, THERE'S NO SPARKS OR ANYTHING FOR THAT MATTER. I DON'T KNOW WHAT TO DO ANYMORE. I'D THOUGHT IT'S THE COMPUTER BOX SO I WENT AND GOT ANOTHER COMPUTER BOX BUT I STILL GET THE SAME PROBLEM. PLEASE, HELP ME WITH THIS, I DON'T KNOW WHAT ELSE TO DO. THANK YOU,


JULIET