A new alt solved my no charge, and battery light on situation.

Daily the car 2 weeks, now the battery light is back on. But the alt is still charging to 14.2v even with ALLLL the accessories turned on.

So i dont believe the new alt is bad, but what causes that light to stay on?

Testing:

I did grab a set of jumper cables and made extra battery-body and battery-engine grounds. Did not help at all.