'91, Cranks but No Start (and radiator fan runs?!)

[RussMcB]

My '91 has not started for a few days. Below are all of the possible clues I have gathered. Any help is GREATLY appreciated.

1. No stored codes (just blinks 12's)
2. When cranking, no RPMs show on dash
3. No fuel pressure
4. Have spark (I've only checked cyls 1 & 3 thus far).
5. When I turn the key to On, the driver's side radiator fan runs constantly (and it's loud enough to prevent me from listening for fuel pump humming). This seems odd since I think the fans should only come on at certain temps.
6. One week ago the car was running great after new injectors, coils, Haibeck chip and disabled secondaries.
7. The night before the "no-start" the car stumbled/hesitated several times during a 10 mile drive. With each stumble, the center dash would light up, then go back to normal pretty quickly. It seemed to happen during light throttle/coasting. At one point the engine died completely and I coasted into a parking lot. After a few minutes it restarted and seemed OK until I got home (I drove it pretty gingerly).
8. All fuses near the passenger door are good. (Are there others I should check in other locations?)
9. Recently I purchased a VATS bypass from Eckler's, but have not installed it yet.
10. I've pressed very hard on the clutch pedal, but that does not help. I have not yet tried to bypass the clutch switch.
11. The battery condition is good (I have a load tester). It has been on a trickle charger so it's topped off.
12. New (rebuilt) Bosch starter installed recently.

I have the FSM and have tried to read the troubleshooting steps but find it extremely confusing.

I'm hoping someone can chime in and let me know if the clues above rule out some possible causes, and point towards certain systems I should check (and how).

I'm prepared to spend money on a scan tester, but not really sure it will identify the problem.

Thank you.