Battery not charging?

Thanks much for the quick response! It could very well be that the vehicle just sits too long, too often. I'll start putting some miles on the vehicle and see if that helps. If not, further testing will commence. I was just curious about the engine-running battery voltage (same also measured at the alternator's yellow wire on the three-wire plug) exceeding 14.5V, but you've suggested 15V is not out of the question. It may be a few weeks before we find out if driving it more often (or pulling the negative cable when not in use) helps. Will update then.

Again, thanks for the quick response.

A few months ago the battery light started going on and off, then it just stayed on and my battery would not charge. I have replaced the alternator 2 times, and I think that they get shorted out because the problem still exists.