Thursday, my battery light came on, the battery gauge started dropping to dead. Today, I took the alternator and had Autozone and Oreileys test it. It passed at both locations. Had battery tested battery shows good. I have a 96 chevy tahoe, it has one lead attached with the plastic clip, going to something I do not know where. noticed when i over rev the engine the battery indicator goes off, but the charge does not go up. I don't know what to do now. Help