Car lost all electrical while driving

You have got to learn to troubleshoot. I don't know what you "have" what you "need:"

1....Multimeter and 12V test lamp
2....Some alligator clip leads. If you have the battery in the trunk you need to make one about 20ft long for various tests
3....A shop manual you can access (cheap laptop?). Go to MyMopar and download a free service manual, and the aftermarket two page wiring diagrams. Each has their advantages
4....LEARN the basic power distro, as laid out in the MAD electrical article here:

Catalog

This diagram:

amp-ga18.jpg

The above diagram is likely the most important thing you could learn for any of these cars. This simply lays out the major power distro in these girls, and shows the major failure points, which are

The battery, battery cables, fuse link, RED wire going through the BULKHEAD CONNECTOR, the ammeter, (and the ammeter wire terminals), the BLACK ammeter wire WELDED SPLICE, and back out the BULKHEAD CONNECTOR to the alternator

This also "touches" on the IGNITION SWITCH which feeds the IGN1 "run" power back out through the bulkhead connector

Follow the path from the main battery PLUS post. That path through the bulkhead, through the ammeter, and up through the welded splice---any failure in that path will cause complete power loss........no lights of any kind, and no crank

Your trouble could be any one of the above list or even a combo of 2 or 3 or?? of them

FRANKLY because of your former description, I would NOT WASTE ANY TIME I would pull the bulkhead connector apart and clean / inspect/ repair