The only thing I can think of is either the power wire to the alt has worn through and is shorting out or something in the alt has done the same. Does it only happen when the engine is running? If so, disconnect the battery, remove the alt, and have it checked at a nationally recognized parts store. Most will do it for free. If it is a the wire shorting, be careful because it could cause a fire. Actually, either could do it.
Saturday, July 11th, 2009 AT 8:04 PM