Fuse keeps blowing..Truck wont Start

Alright, I was on the way into town the other day and my truck randomly shut off when I was merging onto the highway. I coasted over to the side and took a look at wires and all but saw nothing wrong. We then found that a 20 amp fuse blew in the engine compartment fuse panel. I replaced that and it was fine. I got home and was backing into my drive way and it did it again. I went and bought a whole kit full of fuses today and put one in and it blew before the truck even started this time. When the fuse blows the truck turns over but doesnt fire. Seems like no gas. In my owners manual, the diagram of fuses is wrong so i dont know exactly what it is. I am supposed to be trading vehicles with my sister tonight to do some maintainence on her car. But I need mine fixed first. Fast help would be greatly appreciated!!!

Any ideas??

check wires behind the alternator

What fuse is it?

All i can find for a label is mini fuse 9. Its in the fuse panel in the engine bay.