Check the connector for the voltage regulator. If all the wires aren't seated into the clip and making propper connection, it will exhibit this symptom.
If you always do what you've always done,
You'll always get what you've always got
http://www.classic-mustang.net/johnpro
If you always do what you've always done,
You'll always get what you've always got
http://www.classic-mustang.net/johnpro