Nissan Repair: Micra battery light, alternator, headlights

Question
My Micra battery light keeps going on and off when it feel like it. It has been in the garage several times for new battery and a new alternator and the mechanics cant find the problem. WHat can it be and how can I fix it? Mnay thanks.

Answer
Hi Martin -

the only thing I can think of is the alternator is not charging enough under load. I just could be that you have adefective alternator.

Please have it load tested. At idle with the headlights on, should read a minimum of 13 volts.

Hope this helps -
calvin