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Question: 2001 chrysler town and country 3.8L V6 cranks but no spark

Here is the list of events and repairs in the order that they occurred.
Van started running bad when running suddenly.
Replaced plugs and wires
van still ran bad
Plugged in van and error code read bad fuel injector cylinder 4.
Replaced fuel injector cylinder 4.
Van ran but died when given gas
Tested fuel pressure - 62PSI
Tested pressure in cylinders. 110-120
Sprayed carb cleaner in air intake
Van ran good. Engine revved.
Van died while running and would not restart
Would not turn over - no crank
Took out started and tested. Starter works
Took off Fuse panel - found some corrosion.
Put Dialectic grease on and reinstalled.
Checked all fuses and relays, including replacing relays
Still no crank
Took out ECM, and put in different ECM.
Still no crank.
Reinstalled original ECM.
Van now cranks but does not spark
Replaced crankshaft sensor.
Replaced camshaft sensor.
Still cranks but no spark.
Key in the on position does not turn check engine light on. Red security skim light comes on. wait 3 seconds to try to star and still no spark.
Disconnected battery, charged and reinstalled.
Following error warnings appear
P1684 - Battery Disconnected with in last 50 starts
P0122 - Throttle position sensor circuit low voltage
P0117 - ECT sensor circuit low voltage
P0107 - MAP sensor circuit low voltage
P1478 - Battery temp sensor volts out of limit
P1599 - A/C pressure sensor volts to low
P1496 - 5 volts not being supplied where needed
P1192 - Inlit air temp low circuit

Any idea what to try next? Completely out of ideas. Any help is appreciated.