I got an alternator off of a 98 integra off of ebay. And I had it tested and they said that it worked well, putting out about 100 amps. But when I put it into my car, a '99 teg, it's not charging the battery. The only difference that I can notice is that the belt doesn't quite fit right, but it still spins. I'm wondering, could the plugs be different on the two models? Other than that, I'm not sure what the problem could be....both are obdII, so I figure they would work. Can anyone give suggestions on what I should do?

Thanks.