Q: Alternator and Battery Changed on 2000 Ford Taurus

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Alternator and Battery changed still not charging. Air Bag Light stays on. Check Engine Light has been on for some time
(1) Answer
You really need to get the codes for the Check Engine Light, because the Engine Computer is involved with the operation of the charging system.
The Air Bag System will also need to be Diagnosed and codes pulled, but fix the Charging system first.