02 Pete 379, Cat C-15 Truck will crank but won't start

Check voltage. need around 13 to 14 v to start.

You probably just need New batteries. lead Plates break over time. If you have a apu, start it ahead of time to put a little charge on the batteries.

And check fuse again, of course.

 

Start by following the wire that fuse popped and stopped the truck to look for a rubbed spot in that wire that wire must have a bad spot in it that you can find its easy to look when your not on side of road looking?

 

Had the same problem on my freightshaker,fused small cable running from batterie to starter than to somewhere in the engine bay.
Removed all the cable as far as i can trace it and replaced it also removed the fuse from the batterie box to the engine bay,haven’t had a problem since

 

I doubt it’s a battery problem. If it cranks then the batteries are good. Follow the fused wire tho, you have a bad ground, loose conection, broken wire.

But since it does crank, it could be more indepth than that. It could be a bad fuel pump, or the emc frying out from the vibrations of the dirt roads. You could even be sucking air in a fuel line, not leaking but letting you loose prime while engine is off.

 

Follow the known issues first. Fuses don't just blow for no reason. Find out why that fuse popped first and correct that problem before chasing anything else.

 

Check the wire running from the batteries to the ECM. That fuse is your ECM battery power, and are known to corrode almost all the way to the ECM pin connection .Once entire wire is replaced, check your engine/frame ground wires for corrosion or bad/loose mounting bolt.