ive redone the grounds. im using a autometer volt meter, i know the factory meter isnt accurate, that was the reason i got one. i also used my multimeter and it drops to like 12.08. originally i thought it was the alternator, so i replaced it with a 155 amp one, but still have the same problem. even if both the volt meters are inacurate, you can tell its losing voltage because the lights dim, the wipers go slow and the fan slows down. the problem actually started at the end of summer but it was just a faint difference. now its real bad.