electrical issues
 

ok figure this one out... to start my truck in the morning in the cold i have to warm the fuse box under the hood with a hair dryer. everything works except glow plugs and power to starter till i warm them up. i replaced the starter relay already and that isnt the problem. i have pulled the cover and all the wiring appears to be fine ( i.e. nothing pinched or broke )
i am baffled, any suggestions would be great. thanks alot

how are all the electrical connections, are they free of corrosion and battery acid?

everything appears to be clean and dry, I am just dumb founded on this and I know it is something easy. I just have to find it

the glow plugs and starter get power directly from the battery. have you gotten them tested?

the batteries are 2 months old and the glowplugs work. i have tried jumping it also with no luck. thanks

do you have a DMM?