i think i got a draw some where which i read is pretty common had to keep jumping my truck...after i replaced a weak battery yesterday i noticed the glowplug light was not coming on...didnt think anything of do the fact it was starting pretty strong. let truck sit overnite and truck wouldnt start. just clicking like the batteries were dead again. jump start it (glowplug light coming on) and noticed after driving it around a few times turning off and on again, the glowplug light was not coming on at all. never seen this before. woke up today to batteries dead again...my first assumption is that my glowplugs are constantly on even if the truck is off. any help or hints or easy ways to check would be appreciatted.