1996 355 Spider. Alternator light sometimes flashes randomly. Sometimes it stays on constantly for quite a long time ( 15 - 20 minutes) before starting to flash randomly again. Alternator has been rebuilt by Ferrari authorised 'outsource', and been back to the main dealer 3 times for same problem. Original problem diagnosed as a faulty alternator ... it was then rebuilt. However it was 'rebuilt' in the wrong way. Apparently 2 types of alternator .. one for carburator cars and 1 for injection.... I got the carburator version ... same shape ... less pins .... >>> problem not solved. Eventually after the wrong rebuild was discovered, it was corrected and was OK for ~ 2 months. Now back to flashing etc.... I should say that the battery never runs down .... even when running with high load on battery. Is there anything else that controls the alternator light on the dash?