The first thing we need to do is confirm the alternator is charging or not. All you need is a voltmeter or multimeter. Follow the directions in this link:
If you find it isn't charging, and it sounds like it isn't, then I need you to check for power at two points on the alternator itself.
If you look below, I attached the wiring schematic for the charging circuit. Note that both wires I'm having you check are power from fusible links. If one has failed and power can't reach the alternator, it won't charge.
Here is a link you may find helpful:
The fusible links will be in the relay box in the engine compartment.
Check these and let me know what you find.
See pics below.
Images (Click to enlarge)
Wednesday, January 12th, 2022 AT 7:49 PM