Why is not charging the battery?

Check the belt on your alternator. Check the cables from the alternator. Use a multimeter to test the alternator.

"1: If your battery light is on while the engine is running, your Alternator is not producing any charging power. Check the cable connections or have the alternator checked. It may need replacement.

2: That icon means you should check your coolant, because it is running low."

make sure your battery cables are clean and tight. check with 8mm wrench

I have put a new altanater on it and it does not charge

I put a new alternator, starter, and battery. the car is still not charging. not sure what the reason is