Isx 15 will not start

[Mr Hagg]

Id listen for low pressure fuel pump. It may not be coming on. ALso look at ALL fuses. Those T660 sometimes has fuses in the battery box as well as in the front of cab.... If you have insite hook up and see what its telling you...When you turn it over will the RPM gauge move at all...Im leaning on that when the batteries was weak the start up may have zapped a fuse,,,
What part of the world is the truck in