Had the volt meter climb higher and higher til it pegged. Only came down a tad when headlights were on. Had alternator checked in car by Autozone. Came back failed diodes. By time I got alternator replaced it fried my radio which looses the station after a few minutes now. Gage still pegged with turn signals causing the Fiero familiar slight dip with turn signal flashing. New alternator checks out okay. Any ideas? Could I have fried the gage also? All other gates work fine except for stupid oil gauge which reads right every now and then (guessing it's the sensor)