Here is a simplified diagram of "that part" of the car. Do not take this diagram LITERALLY as some years changed a bit. But this gives you an idea of the main power distro:
The ammeter bypass article
Catalog
Diagram from the article
View attachment 1715190169
This is the functional path, not electron flow. Power comes off the battery and makes it's way to the "big stud" on the starter relay, which is one contact of the relay and also acts as a junction point
From the relay junction stud........to the FUSE LINK and through the BULKHEAD CONNECTOR
Keep in mind this is a CONNECTOR. If its' damaged, you could be losing power right there!!!
Then power (RED) goes to the AMMETER. That itself could have problems, bad/ corroded wire ends, loose nuts/ studs, or the internal parts, so you could be losing it there
After the ammeter, goes out on the big BLACK which goes BACK out through the firewall connector to the ALTERNATOR. See if you have power at the ALTERNATOR OUTPUT STUD
"Back up" a bit on the BLACK to the WELDED SPLICE. This is a splice up under the dash not far from the ammeter, where the wires are factory welded as shown THESE CAN, HAVE, and DO fail!!! Likely this is not the trouble here, but 'be aware' of it
IF YOU DO NOT hae a wiring diagram you need to go to MyMopar and download one. They have some years factory service manuals, as well as aftermarket wiring diagrams. Those diagrams are sometimes easier to follow than factory, but sometimes leave out connectors and options
MyMopar - Mopar Forums & Information - MyMopar Tools/Reference
