I just bought a 1994 C3500 as a "not running" truck. My efforts to get it started (it won't yet) have closeds in on several issues. I filled the tank with diesel oil and turned on the key with batteries fully charged I could not hear the rise pump running so I checked the voltage to the pump....nothing. So I checked voltage going into the pump relay....zip. All fuses are fine. Could an "iffy" PMD (I suspect it is on borrowed time since the former owner said that it would quit at streetlights) shut off all of the power like this? What fuse does the rise pump amperage go through? If I knew this I could at least trace the power up to and through the fuse box. ANy ideas such as fusable links that this could be?