i went through 3 rebuilt alt's in a row, in 3 days, 2 of them were over charging, way over 14 v. they all tested good at the store, but were bad. they shouldn't put out more than 14.3 i believe.

so get another alt, the last one you bought may be under warranty still, 90 days i think. they will just keep giving you a new one no questions asked. at least i had no problems, and went to 2 different stores. duracrap too from autozone. you do need the receipt.