The other day I had my check gauges light come on. My voltmeter was sitting on 9. Came up to normal a few seconds later. No squealing from the belt that I heard. Since then I have kept an eye on it and noticed that it goes down to 10 or so at idle with some accesories on, especially the defroster. This is a 2000 XJ completely stock so i have no high powered add-ons. Is this normal for the alternator to not be able to keep up at idle or is the alternator on it's way out.
Eric
Eric