I've read this posted here atleast 5 times on civics, I fixed my own, and 2 of my friends, and my info fixed the threads on here. Look in the fuse box, and check the damn fuses.

I'm not arguing that it could be the alt. but a fuse is a hell of a lot easier to change, if thats the problem.

When my fuse blew i bought a new alt, and went through about 4 batteries before I figured it out. Don't take that route.

If it helps, my lights kind of flickered as the battery was dying, I would only get about a days worth of driving out of a brand new battery.