If you're having charging problems, you should:
* Check the alternator's output: Have it tested at an auto parts store. This is the most direct way to determine if the alternator is functioning properly.
* Inspect the wiring: Look for any broken, frayed, or corroded wires going to and from the alternator.
* Check the battery: A weak or failing battery can also cause charging problems and may be mistaken for an alternator issue.
* Check relevant fuses and relays: While there isn't a dedicated "alternator field" fuse, check the fuses related to the charging system in the underhood fuse box and the power distribution box (often in the passenger compartment). The owner's manual will list which fuses relate to the charging system. A blown fuse indicates a larger problem that needs investigation before replacing the fuse.
In short, focus on testing the alternator itself rather than hunting for a specific "field" fuse. A mechanic can perform a more comprehensive diagnostic test if you're not comfortable with electrical troubleshooting.
