Just wondering how long to hold the button on when starting the 6.2 diesel(the relay is wired to a pushbutton switch),also wondering if the original controller should be unplugged when going to manual switch??.Its still hooked up as oem except for the ground wire to the switch to activate the glowplug relay.Should I leave the glowplugs on while cranking the engine--It starts preety good now that I put the new glowplugs in,but dont want to have to buy them again--68 bucks with tax at autozone!! /forums/images/graemlins/eek.gif /forums/images/graemlins/eek.gifI dont want to burn em up by doing it wrong! /forums/images/graemlins/angryfire.gifAt least now I can drive it into the garage and start the re-plumbing of all the fuel lines and I'm going to use only 1 of the dual tanks since I dont go too far--anyone know how the dual tank switch is wired??mines missing,just a hole in the dash with wires hanging out--has anyone got a clue?? or should I just copy the wiring on one of my other trucks with single tank? /forums/images/graemlins/1zhelp.gifI have a wiring diagram,but its so small its hardly readable! /forums/images/graemlins/frown.gif.