This could be a sign of the alternator about to go out soon as the carbon brushes could be running short and not providing proper contact at all times. When problem occurs, try tapping the alternator and if the light goes off it could be it.
The other possibility is a failing alternator rectifier within the alternator or the wires that you mentioned that are damaged. Check for wires that could be almost broken and not making the required connections. Wiggle the wires at alternator and check if the light comes on.
Tuesday, February 5th, 2013 AT 6:13 PM