A couple of days ago, my battery light along with my ABS light came on lightly. In the night, when I turned my lights on they became brighter. I purchased a new battery and the ABS light camo off. However, the battery light come on from time to time. Sometimes brighter than others... When I'm on the highway, it goes away, but in the mornings it comes back on. What going on? Can it just be a faulty light? Thanks in advance.