A few times this week the batt icon has come on, some times it comes on and when I restart it disappears, but once this week it stayed on for 4 hrs with repeated restarts and drivinf around tow. I check the battery for corrosion and to see that the green light in the battery is on. Does this sound like the alternator? Are there codes embedded that the tech. could read even if the batt light doesn't come on?

One other thing, has anyone had problems with their wipper resevoir?