1987 Ford F-150

I HAVE A 1987 F150 WITH THE 4.9L 4SPD 2WD I STARTED THE TRUCK AND DROVE IT AND THEN SHUT IT OFF WENT TO RESTART AND WOULDNT SO I HOOKED POWER TO FUEL PUMP INLINE AND STARTED I UNHOOKED AWIRE ON THE RELAY AND PUT IT ONTHE TERMINAL THAT NOTHING GOES TO AND IT POWERED THE FUEL PUMP BUT IT RUNS CONSTANT AND IF I PUT IT BACK ON TERMINAL ITS ALWAYS BEEN ON NOTHING HAPPENS ANY IDEAS