Ok I got done checking it w/ a load tester. It sits at 12.5v when it's shut down and 12.5v when it's running. Hit the tester and it drop off to 10.5v and goes back to 12.5v when I shut the tester off. Do they only go to 12.5v? New battery in yesterday.

 

a batterie dropping from 12.5 to 10.5 isnt bad. if you only have 12.5 volts with the engine running then it is probably an altenator problem

 

if the car is running and the load tester only says 12.5 it's the alternator going bad. if all charging systems are good they should be charging @ 13.9v.