MY 1996 POWERSTROKE IN MY E 350 VAN AND CHASSIS WON'T TURN ON THE INJECTOR PUMP. I REPLACED THE SOLONOID ON THE INTAKE FOR THE GLOW PLUGS. IT RAN PERFECT UNTIL ONE DAY IT HAD A FUEL ISSUE. I RESOLVED IT THEN THIS PROBLEM CAME UP. I CAN JUMP THE SOLONOID TO TURN ON THE PUMP AND IT RUNS FINE. IS THERE A RELAY FOR THIS ? ALL THE FUSES ARE GOOD. IT SEEMS THERE SHOULD BE A RELAY. I FOUND THEM ON THE CORE SUPT. BY THE DRIVERSIDE BATTERY. WHAT SHOULD I DO? PLEASE HELP!