No longer starting

[one3n3my]

The truck was running fine after it was rewired with a painless wiring harness. Then it started running and then cutting out after a few minutes which I thought could be due to the fuel sending unit and the mechanical fuel pump. I replaced both of those but now its not even turning over. Had the starter tested but the test said it was fine. The fuel pump fuse keeps blowing but have no idea where to go from here. Any help would be appreciated.