My voltmeter on my dash almost always read about 14 to 15. Well yesterday on the way to work it barely read 12. I came home for lunch and pulled the alternator and took it to AutoZone and had them check it. They said it was good. Tonight while driving it was flirting with the 13 but not past it. The reason this is an issue is because twice it has left me stuck. I try to crank it and all I get is a click. Thats when I started to notice the drop on the gauge. I checked and cleaned all my connections. Any Ideas or suggestions? It seems to be a intermittent problem.