Decided to make a new post since my original post here had about 20 other things intertwined in the discussion that are all pretty much taken care of now... but I am still getting a battery light.
Sometimes it will stay off for a whole car ride. Sometimes it will come on right away and stay on for a whole car ride. Sometimes it will come on in the middle of a ride and stay on for 10 minutes and then shut off. Seems to be coming on independent of load/RPMs/etc.
When I first had this checked at the dealership, the altrenator tested fine, the battery itself was just a little on the weak side.
Got a new battery and I still got the light.
I went to turn in my old battery at Autozone and they tested it there and it read as "good battery". They then wheeled out the cart and tested my battery and altrenator again... and again, it came back fine.
The connections seem to be fine. The cables, at a glance, seem to be fine.
I guess I should note that it does have an aftermarket stereo, and also, whoever had it before me had disconnected the alarm (I think the alarm was stock.) Not sure if either of those things make a difference in how I should approach diagnosis.
Oh, and I would also like to note that everything seems to be working fine (no dimming lights, etc) except that sometimes I will get static on my radio when I push the rear window defrost. But I thought that may have more to do with the aftermarkete radio than the battery. I could be wrong.
Thanks!
