My 1994 f350 with the 7.3 Idi, I drive this truck nearly daily and keep an eye on gushes so it's a new problem. I get in it start it all seems normal, turns over fine and starts, battery guage fluctuates while GP's cycle, usually it jumps to normal after they stop but it didn't this time. I leave out thinking the cold snap might have drained a little more juice but it never did charge up. I get to my jobsite and check voltage at the pass side battery running it's 12.8vdv. I kill the truck, finish my shift same thing as before, I make it back home go to look at it this morning both batteries are at 11vdc with cable unhooked, so I'm charging batteries and gonna try to check a few more things, this is my service rig and I leave in 6hrs so some check points to weed out some time would be appreciated.