New Alt. Problems in Civic

Right on Thedfndent, When I upgraded the alternator in my Grand Cherokee, I ran 4 gauge from the alternator to the battery post, and 4 gauge for the ground battery cable. Corroded does not sound good man, upgrading the wire to larger and cleaning up the connection will make all the difference in the world.    Tim-May!

I completely agree w/ the ground suggestions.  I planned on doing that, I just hadn't yet.  Anyways, I upgraded my alt.  and battery ground last night.  I'm beginning to think that my problem is the result of a loose belt.  The alternator belt is not very loose feeling, but not quite as tight as other belts, (power steering, etc.)  When I start my car now, I here a quick high pitched squeek, which I'm pretty sure is the belt slipping when it first starts spinning.  So I'll tighten my belt and hopefully that will solve my voltage problem.  I still don't know why my VSS isn't working though.  Maybe I was unclear before, but I don't have any harnesses unplugged.  I unplugged a couple, but they are all plugged in now, and I've disconnected my negative battery cable ( when I replaced the ground cables) since plugging them back in.  Also, my check engine light is still on, probably due to the problem with my VSS.  I friend tested the engine computer before I replaced my alternator, said it was reading a voltage spike and an open loop.  He's an experienced mechanic and he also tested my alternator and said it was bad.  Another friend of mine( an amateur mechanic) said that it could be my voltage regulator.  I know absolutely nothing about voltage regulators.  I can infer what it does from the name, but I don't even know where it is or what it looks like.  Any more advice would be appreciated. 

the stock alternator u took out most likely had a voltage regualtor built in to it..The aftermarket is most likely the same way the regualtor is almost always built in now and days.