Truck died, any ideas?

[Classicfordguy]

Truck died last night right after I pulled over cause of a burning smell...turns out that was the maxi fuse frying. I swapped a new fuse in, glow plugs cycle, truck starts then dies 3 seconds later.

I can run a jumper to the fuel sulinoid and the engine runs fine but the glow plugs don't cycle. I'm assuming the glow plugs and fuel sulinoid are on the same circuit? Its the yellow 20 amp maxi fuse on the left furthest away from me if I'm standing at the driver fender.

Any ideas?

thanks,

-Rob