My van died while driving. I tested the fuel pressure when I got it home and assumed it was the fuel pump when I got a zero pressure reading. I replaced the fuel pump assembly, fuel pump relay and the fuel filter. The van ran just fine for about 140 miles then it died while driving just like before. After dropping tank a srcond time, I did some futher testing and found the circut to the fuel pump was dead. What other than what I replaced would make the electircal system to the pump go dead?