2000 Chrysler Town and Country inhibitor switch

There is no such switch. What are the symptoms? Do the head lights or interior lights get dim or go out when you try to crank the engine? Do you hear a single rather loud clunk from the starter each time you turn the ignition switch to "crank"? Have you tried starting it in neutral?

Look for a starter relay under the hood in the fuse box. Remove it and jump terminals 30 to 87 with a stretched-out paper clip or piece of wire. Be sure it's in park if you have the ignition switch on. If it cranks that will prove the battery, starter, high-current wiring and starter solenoid wiring are all okay. That just leaves the transmission range sensor circuit which to complicate matters is incorporated into the Engine Computer.

Instead of jumping the terminals in the relay socket, you can also pop the cover off the relay, install it that way, and squeeze the contact.

Yup. You can remove the relay's cover and squeeze the contact or you can just jump the two terminals with a piece of wire. That will tell us if the starter circuit is okay.

This is a different expert.
The Park/neutral inhibitor you refer to would be the transmission range sensor which signals the PCM when the vehicle is in park and can prevent it from cranking if it doesn't see Park/Neutral.

You really need a professional scan tool for this so you can see exactly what the computer is seeing.

No, Dodge makes a Caravan
Plymouth makes a Voyager
and Chrysler makes a Town and Country.

That's an important clue. There is a break in the circuit which could be due to a broken wire but much more commonly it is a bad connection in the range switch. Replacing that switch requires removal of the transmission pan and valve body. That is easier than replacing the entire transmission, but if you need to swap transmissions anyway, you'll be getting a different switch too.