Service Manual Isn't on MyMopar

Why didn't you say that back here?
Duster fusible link wiring problem
When some gives a 'thanks' and no further questions, most of us assume that means it was useful.

Here's how to read the basic Chrysler diagram
Electrical Wiring (Session 247) from the Master Technician's Service Conference

Then you need to practice reading them. You can start with the colorized and sumplified diagram in the linked post above. See if it matches what you have in the car. Post pictures and questions if you need.

@67Dart273 has also scanned the Chrysler diagrams for 1976 A-body - a link to that pdf is in the sticky thread about Factory Service manuals.
I bought a laminated wiring diagram and service manual from eBay, so hopefully I’ll be able to get it down.