please help

well i asked this question before and no help hopefully i will get one know i have a 2001 ae maxima and my engine light & BRAKE LIGHT COME ON that says my alternator is not working but something it goes away for awhile and the alternators is charging what can i do thanks for your help

check the battery terminals these could be loose causing a drop in voltage from time to time also check you battery, it could be defective, since it is not supposed to go bad yet.

Tighten belts if cable connections ok.

check the battery terminals these could be loose causing a drop in voltage from time to time also check you battery, it could be defective, since it is not supposed to go bad yet.