93ChevySilverado

So there is no power goingis to fuel pump but both the fuel fuse and relay are good. All fuses in fuse box are good. Also in the picture We found a connector coming from the warning harness but couldn't find where it connects. This wires leading into the connector are purple and blue. Can see it in the picture sticking up in the middle. Trying to figure out what the long connector goes to right in the middle of picture by firewall