Because of the failure mode, I don't think it is corrosion. Drove to dinner, got half way home and it shut down into a no crank, no fuel pump prime, no CEL situation just after leaving the light at the intersection. Corrosion would be more so intermittent, and I should still get a CEL.
Still in the process of trouble shooting, and getting some strange results...
Checked my IGN/Dome fuses... both good, both terminals have power, but when I pull the IGN fuse out my Check engine light comes on, re-install the fuse and the check engine light goes out (I also noticed a buzzer going off? only when the fuse is in). Tried to run codes on it with the fuse out but nothing. Not confirmed yet, but this keeps my focus on a bad computer.
Also jumped the Constant power to the green wire on the connectors and it cranks... but wont do so from my new switch.
Next step is to pull the washer tank and check the pins on the computer... Won't happen for a couple weeks until we get moved and settled into our new house. Jeep is on hold at the moment. I won't be surprised to find a multi point failure here.