Something Really Weird to me

I had a problem that started to be a big problem today that i had only seen once a few weeks ago. The problem started when my alternater died and while i was driving the ac shut off like not blowing air and the abs light came on. I thought nothing of this at first. Everything was normal after a restart. So i got the alternater replaced and upgraded charge wire and ground wire and optima batterie. Well today while pulling into the colledge the ac shuts off and abs light comes on and then a few seconds later the ac comes back on and the abs light shuts off. Well now the problem is constantly happening and while the abs light is on and ac is not working i cannot take the car out of park without using the lockout release by the shifter. I have a feeling this could be a power issue to somthing but would like anyone who has any ideas to please let me know..thanks
Jared