A dash ammeter is about as accurate as a gypsy fortune teller. Chances are the charging system is working right if the voltage is good. Does the ammeter needle return to center with the engine off and the lights out?

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!