Issue:
Driving slow (~10 mph through road construction) at night, with A/C & headlights/fogs on, the battery light briefly came on and dings once. There's been about 250 miles put on since, with no lights. Jeep runs fine, it has 100K miles on it.
I, regretfully, did not attempt to pull the code...
Here's what I've done since:
1) Checked and both the battery and alternator have excellent connections. Tight with no corrosion.
2) I pulled the alternator and battery had them checked at local, reputable Carquest store. Both are "good".
3) Belt does not look glazed. It's a top of the line Gates belt with ~22K miles.
4) Both the idler and belt tension pulleys spin free, not loose.
5) Belt tension pulley spring has plenty of torque tension.
It's possible that the alternator is "intermittently bad"… and just checked good this morning.
Any recommendations?