I've read where others have had this same problem and now my S-10
is broken down until I can figure out what is causing this or where the
failure/short might be located.
         I was going down a smooth stretch of road when the truck just
quit.  Towed it home and saw it had spark but no gas.  Made the mistake of
not troubleshooting thoroughly.  Replaced the fuel filter and fuel pump
before realizing that ECM-B fuse was blown.  Fuel pump works fine when wired
direct.  Put another fuse in and it blew as soon as I turned the key on.  It
blows the fuse everytime the key is turned on no matter how many amps the
fuse is.

1)  Eliminated the possibility of a short in the fuel pump and sending unit.
Still blew the fuse after disconnecting them.

2)  Eliminated the oil pressure switch and wires leading from the oil
pressure switch to the fuel pump relay.  Still blew the fuse after
disconnecting them.

3)  Fuse did not blow after unplugging the fuel pump relay  and turning the
key, so I bought a new fuel pump relay, hooked it up and the fuse still
blew.

4)  Checked the wires leading from the fuel pump relay back to the fuel pump
and they appear to be in good shape with no missing insulation.

5)  Checked the wires around the injectors under the hood and they are in
good shape also.

6)  There must be a dead short somewhere because when I hook a 12 volt test
light to the ECM-B terminals and turn the key on it is bright as hell.

Anyone have any ideas?  I have a Haynes, but the schematic doesn't go into
enough detail on the fuel pump relay wiring.  Thanks in advance to any
experts who can help troubleshoot this one.