Although this topic is dated, I am contributing to it in order to maintain its relevance and avoid duplicating my inquiry elsewhere.
I am encountering a same problem with a 1994 Protégé vehicle. The battery indicator illuminated, prompting the user to seek professional assistance at a nearby automotive parts establishment. After conducting a diagnostic test, the technicians concluded that the vehicle's alternator required replacement, as shown by the absence of any voltage reading at the battery.
I purchased the recently released alternator and proceeded to install it, inadvertently neglecting to subject it to a bench test. Regrettably, I am already experiencing identical symptoms, namely the illumination of the battery light and the failure of the alternator to effectively charge the battery. The automobile will successfully initiate ignition using a jumpstart, but, it is evident that the vehicle's operation will be limited when relying only on battery power.
The vehicle was returned to the automotive parts establishment, where it was seen that the alternator exhibited same behavior as previously observed, with a voltage reading of 0 volts at the battery. A replacement has been requested, however, the individual at the parts establishment advised verifying the continuity of the ground connection between the alternator and the battery.
I will attempt to use the aforementioned checklist provided by oldeng in order to assess the situation tomorrow, prior to removing the alternator. I will afterwards provide an update on my findings within this forum.