Do I find a replacement part for it? I got rid of the corrosion but the middle and right one are stuck? What do I do in this situation? Please help if you can.

I got a 2014 patriot with 70k miles and no issues that I know of, is there any reason why I wouldn’t be able to drive about 400 miles in one day ?

1998 Jeep Cherokee XJ 4.0 AW4 – No crank, no start. Any ideas?
Jeep ran perfectly before being parked for 5 months. Now absolutely no crank, not even a click from the starter. Dash lights work.

Troubleshooting so far:
Battery fully charged: 12.9V.
No crank in Park or Neutral.
Tried 3 different starter relays. All click.
Relay terminal 30: 12.69V during START.
Terminal 86: 12.40V during START.
Terminal 85: Ground appears OK.
Terminal 87: 0V during START, relay installed.
Continuity confirmed between terminal 87 and starter solenoid trigger wire.
Starter main power cable has voltage.
Solenoid trigger wire: only 0.4V during START.
Immobilizer light turns off normally.

What could cause this? What should I test next?

Buy mopar extended warranty through finance people that I bought my jeep rubicon, from a legit Chrysler Dodge Jeep RAM dealership or should a buy that warranty from Mopar directly? Car has 25000 miles. Just call Mopar not to long ago and they offered me $5100 for 5 years. And if I recall right the financial people at the dealership before leaving, they were offering me the same warranty from Mopar but way less like around 3800. Did I hear right or impossible!!!

I am really hoping I can avoid replacing the heater core. Below is what I've done/tested so far. Anyone know of anything else I should check before replacing the heater core? The only thing I have left to try is to burp the coolant, I'll be doing that this weekend but wanted to check here for additional ideas.

- Driver's side and passenger side vents both blow similar temps while the jeep is fully warmed up. Approximately 80 degrees, the driver's side is a few degree's less but only 3 or 4 degrees, nothing significant.

- Both heater hoses are about the same temp to the touch when running.

- the blend door actuator was broken but I have replaced that and it did not fix the issue

- I replaced the thermostat, it is not stuck open.

- I thoroughly flushed the cooling system.