yes the fuel pump runs other wise i wouldnt have pressure.... and i checked it with a pressure gauge and it has enough to start a vortec engine.... and if it was a worn wire that was short circuitign wouldnt it blow a fuse???? and i checked all conections none are loose. they all have good seals and are NOT wet or have dirt in them.... checked all fuses and there all good... no problems under the hood or in the cab...