New Member with charging issue

Check the bulkhead connectors. They are a weak link in the charging system.

Battery to bulkhead to ammeter, ammeter to bulkhead to alt.

With age resistance goes up and the connections overheat and melt the bulkhead in both locations.

Best to wire bat to alt directly and use a volt meter to monitor the system instead of the ammeter. Also add a maxi fuse at the battery end.

The Bat wire also supplies the ignition switch so run a second maxi fuse near the bat and wire directly to the Ignition switch.

BTW if you added a 60 amp alternator the ammeter can't handle the load for very long.