Chosen Solution
Which fuse is for the alternator?
Hi Ray, put a voltmeter onto the battery while the car is running to make sure that the alternator is putting out enough current.
@raysmazda like @blakeklein elude to, you do want to check that when the car is running, that there is any change in the battery voltage. If not and all the wiring is good,it is most likely that there is an issue with the PCM. The PCM functions as a voltage regulator. To answer your direct question, there is no fuse for the alternator.
It’s most likely going to be a dead alternator, does your dashboard like up like a Christmas tree?