No start...2000 Wrangler 4.0liter, automatic.

The ECU will turn of the fuel pump if it sees the engine has not started, you can turn the ignition switch on and off or energizer the pump relay to prime the fuel system.

the ASD relay shuts off 3 things
1 spark
2: fuel pump
3: and kills injector power.

you guessed and he guessed.
so>>>>
when the car cranks and not start, we scan it next
or if no scan tool, you are left with the key on 3 times get codes test/

if you key on and the CEL lamp is dead that means the ECU is dead
or fuse bad, cracked or rusty.

when the pump goes dead, make sure the ASD energizes
or its all just a waste of time back aft.
the ASD closes for about 2 seconds,
the pump runs too.
if the ECU sees errors during the cranking for 2 seconds.
the ECU drops the ASD and PUMP dead.
by law. too. the anti crash and burn logic is inside the ECU/PCM

the 91-92 ,we have no cheap scan tools until 1993.so....
to fix any modern car EFI it takes a scan tool or lots of labor
so get in the car, crank for 5 seconds as that service manual chapter 8d tells you, then release the key, then turn off and on 3 times
inside 3 seconds, and see the CEL flash out codes.
(no DRB scan tool that is all you get there)
if no hope still.
see the 7-8 ways the ASD Can drop here.
your car is older, and less ways to drop out.

ALSO
you said smack tank, sure.
but ment , smack it, then get in car and pump runs 2 seconds key on, right,,
did you consider the ground wire to the pump is bad.?
did you condsider the power wire or pins bad, in cars harness
and the smacking jarred thosE>?

I use a voltmeter, to find all this when failed.
my guess, your mech, didnt do that first?
if he did, and 12vdc is across pump for 2 seconds pump is bad.
if he did and 0v or low, low volts is across pump pins the its not the pump or is wire, connectors, to pump (harness et al)
or ASD DID THIS ON PURPOSE>

next would be measure all 4 ASD pins,
see whats going no here, and pump relay pins
while failed.
Diagnosing, it after it self cures it self is near impossible.

my problem related to ASD (automatic shutdown relay) wiring not tight on terminals (fuse box under hood). I traced this to a mechanic (national chain) repeatedly kept dislodging the ASD wiring (while supposedly tracking down fuel pump problem). This act eventually caused the computer to fry.

Is it an automatic transmission?
Have you try to start the Wrangler in Neutral.
On automatic transmission there is a neural safety switch.
When it's not send the correct gate position signal (P R N D... ) to the ECU not energize import relay like ASD.
Check for loose linkage to the transmission. + lube linkage with white Lithium grease spray.
Check for loose wiring to the neutral safety switch.

The power supplied to the fuel pump, ignition coil, fuel injectors, and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD); the idea is to shut off fuel pressure and the ignition systems when the key is turned off to prevent fires, dieseling, and other problems.

The ASD relay is closed (allowing power to flow through it) when the ignition is first turned on. If the signal from the ignition reference is lost while the engine is running, or if the turbo boost pressure reaches and exceeds the over boost cut-off point, the logic module cuts power to the ASD, which in turn removes power from the fuel pump, ignition coil, injectors and those parts of the power module. This causes the engine to shut down.

Failure of the automatic shutdown relay is often shown as inexplicable stalling or refusal to start.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

You don't have one on there. Pump is turned on and off by the automatic shutdown relay and the pump relay. The crank sensor signal keeps it on. If the asd relay does not get a signal from the computer (from the crank sensor), it turns off the pump relay (and spark).
The pump should run when you first turn the key on. When you start the engine, if the computer gets no signal from the crank sensor it will shut the engine off (no fuel, no spark = off)
If when you first turn the key to on, you can't hear the pump, likely either the pump has failed (check power at the pump harness) or the relay is bad.(swap relay for a known good one and try it).

Please refer to this solution: http://www.fixya.com/cars/t1016149-1989_jeep_cherokee

It's probably the A/C relay under the hood indeed. And your battery might have gone bad too.

Check your Automatic Shutdown Relay in your fuse and relay box under the hood by the battery. The power supplied to the fuel pump, ignition coil, fuel injectors,  and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD); the idea is to shut off fuel pressure and the ignition systems when the key is turned off to prevent fires, dieseling, and other problems.
The ASD relay is closed (allowing power to flow through it) when the ignition is first turned on. If the signal from the ignition reference is lost while the engine is running, the logic module cuts power to the ASD, which in turn removes power from the fuel pump, ignition coil, injectors and those parts of the power module.  This causes the engine to shut down.

The logic module monitors the relay driver.  If it senses that the relay driver is not responding correctly it will trigger a code. If the logic module does not sense an absence of current when the circuit is open, or 12 volts DC when the circuit is closed, it knows that the circuit is open or shorted, and triggers code 42. Failure of the automatic shutdown relay is often shown as inexplicable stalling or refusal to start. Good luck and hope this helps lead you in the right direction. Hint: The ASD can be triggered by a broken wire or short in another place, e.g. the fuel pump. 

check foe fuel pump presure at fuel rail,,,if u have fuel pump presure check all fuses with a test light not buy sight,,could be deceviving ,look at and check to see if fuel pump relay is working if no fuel presure i,if u have presure in fuel rail ,replace the cranck shaft sensor

The neon don't have one, check the fuse and relay's. The fuel pump is also controlled by the Auto Shut down relay (ASD). The power supplied to the fuel pump. Ignition coil, fuel injectors, and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD). The ASD relay is closed (allowing power to flow through it) when the ignition is first turned on. If the signal from the ignition reference is lost while the engine is running  the logic module cuts power to the ASD, which in turn removes power from the fuel pump, ignition coil, injectors and those parts of the power module.  This causes the engine to shut down. Good luck and hope this helps.