I was working on my oil filter ,when I shorted out the main terminal on my alternator. It sparked pretty good. The alternator checks out ok, but I only am getting 12.8 volts output, which should be putting out around 14 volts. I haven't been able to plug in an analizer as of yet.Can anybody make some suggestions as to what may be causing this low voltage condition?

 

May have toasted a diode..... which 'should' show up when you test the alt..... if alternator voltage is the same as battery voltage, you may have killed the regulator, which, unfortunately, is in the PCM.

 

^^^ + 1

And how the hell did you do that? The oil filter is 2 and a half feet away from the alternator.