firing problem

i have a 1991 chevelot s-10 2.8 150000 miles ---the problem is that my dash light will not come on there is no spark only half of the fuse block work what went wrong

i have a 1991 chevelot s-10 2.2 150000 miles ---the problem is that my dash light will not come on there is no spark only half of the fuse block work what went wrong
its a 2.2 engine