Hi. I have an 84 nissan 4X4 z24 and the other day i went to start it and noticed the dome light wasn't on when i opened the door i also noticed the key chime wasn't working but both of these worked as soon as i started the truck...but the volt meter was only reading 12 and it's usually around 14 and the batt light was on.. i also noticed at night the brake lights didn't work until i started the truck...i drove it for a couple of days like this because it never seemed the battery was dying...but finally it did... so i took the alt to auto zone and it passed..but i bought i new one anyway because i didn't know what else it could be...i put the new alt on and it's still doing the same thing...please any help would be appreciated....