Is there a fuse that keeps the alternator charging?

There isn't typically a single, dedicated fuse solely responsible for keeping the alternator charging. The alternator's charging circuit is more complex. Instead, several fuses and components protect different parts of the system. A problem with the charging system might manifest as a blown fuse *related* to the charging circuit, but not necessarily a fuse directly labeled "alternator."

Here's why:

* The alternator's output is regulated: The alternator itself regulates the voltage. Fuses primarily protect against overcurrent, not voltage regulation.

* Multiple circuits involved: The charging circuit involves the alternator, the battery, the voltage regulator (often built into the alternator), and wiring. Each part of this system might have its own fuse or circuit breaker for protection. For instance, a fuse might protect the alternator's power wire from the battery, or a fuse might protect the wiring to the warning light that indicates charging problems.

* Fuse location varies: The location of the relevant fuses varies greatly depending on the make, model, and year of the vehicle.

If your car isn't charging, don't just start randomly replacing fuses. You need to have the charging system tested by a qualified mechanic. They'll be able to pinpoint the problem, whether it's a blown fuse, a faulty alternator, a bad voltage regulator, or another issue.