Alternator not charging the battery

Check and clean both battery cables at the battery and where they connect at the starter and ground.
Check your ignition and charging fuses.
Use a test light to check the fusible link at the battery.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Does your charging system/battery light come on when you turn the ignition on?
(Reason I asked is because there is a diode which sits on top of the fuse box [under dash on the driver's side]. That diode can be checked using a test light. It should allow current to flow in one direction but not in the opposite direction, anything other that this would indicate a bad diode) Included is a diagram of where the diode is located. It is marked as number 348M.