Caterpillar 3406 in a Pete 379 (2000 Model)

Could be a cam or crank sensor those are common!

 

I also had corrosion in fuse box behind kick panel truck with crank and crank and never start! Took it completely apart cleaned it all up fixed my problem!

 

Does it have a hand primer on secondary fuel filter? If so pump and see if is hard it gets hard pretty quik...

 

If it’s hard it’s most likely not fuel.

 

When you turn the key to the on position do you get a check engine light? If it lights up and turns off your ecm is getting power. If it doesn't light up your ecm isn't powering up or your bulb could just be burned out I suppose.

Do you have a fuel pressure gauge?

 

I have a 2000 Pete with a 2WS motor probably exactly what you have when I turn the key on nothing lights up on the dash by low air light!
Fuel pressure gauge will not work until motor is running! You have a return line that comes off the back of the head goes to the secondary filter you can crack it open crank the truck over if fuel comes out then it’s not the fuel system.
every time I’ve had a problem it’s always been electrical! As far as the cam sensor and crank sensor they’re probably old replace them anyway unless you have a broken wire somewhere I would definitely look for that or a bad connection it’s 20 years old it just goes with the territory!

 

Fuel pressure gauge will show pressure if you have it when pumping hand primer or as engine is cranking over

 

Find the sensor near the air compressor and change it 1st, when its bad it wont throw a code and can drive you in to spending all kinds of$$ before finding its a simple sensor?