Ok folks here's the trouble.
On my way to work other day my '91, 5.0, m5od, died while driving down the highway. Just like someone turned off the key.
I checked and have fuel at the rail.
I do not have spark at the dizzy.
Swapped in a coil that I know worked... nothing.
Changed the TFI module on the dizzy....nothing.
KOEO code 11 pass
CM codes
14 erratic PIP signal caused a miss...
29 No VSS signal, probaly cause speedo not working.
33 EGR valve opening not detected. Intermittant problem have been ignoring mostly.
I am waiting for a manual to show up so i can troubleshoot the electrical components. Meanwhile any ideas? good place to start poking maybe?

 

OK, after 2 1/2 hours of testing and poking around with a test light and volt/ohm meter...
I have no power to the coil. I had drawn up diagrams of the fenderwell connections and now can't find my notes. Anyone know the color of the wire and plug supplying pwoer to the coil at the fenderwell on the 89 5.0 harness?

 

I win!
Found the culprit after another hour or so fo looking. follwoed the white/blue stripe wire to fender, it actually connects to a blue 20gauge fusible link, then goes to the red/green for the '91 harness. You might have guessed it, power before the link, nothing after it. Spliced in another fusible link and she fired right up!
Now we all know.