Sorry for my first post to be an inquiry, but I'm seriously so frustrated with this issue that its almost impossible to explain. 2 new batteries and a new 120A alternator. Battery light's still on intermittently. I drove fine from home to work but she wouldn't start when leaving work. When jumping, the alternator puts out 14.2 at the back, otherwise we're at a 10.6. Pulled the new alternator, had it tested at AZ and they say its fine (pulled it twice,tested at two different places). Batteries under load toast are fine. What should I look for next FICM issue? 48.5V there. REALLY not understanding.