My daughter has a 2008 Edge and was sitting in Houston traffic when her battery light came on. Got to a safe place and noticed heavy corrosion on positive batter post. Cleaned it up and continued on. When she almost got to her destination, the battery light came back on then the car died. She coasted into a parking lot and noticed the serpentine belt had slipped off. Both the altenator pully and tensioner pulley seem fine. Any suggestion on why the battery light would come on and why the belt would come off?
