OK, now I feel really dumb. I took out the alternator, and didn't  mark
what plugs in where. So now I have the new one, which is slightly
different, and I'm not sure if I have it plugged in right. (This is an 87
Vanagon) On the back of the alternator, I have a larger bolt marked B+
and a smaller one marked D+. D+ has a flat terminal on it. Theres also a
flat terminal in the body of the alternator. Coming from the front of the
enginecompartment is a bundle of 3 wires--2 red, whichcome together into
one round connector which I think goes on B+, and one small blue wire
which ends in a connector for the flat terminal. I know this originally
plugged into the body of the  alternator, but now I  have 2 flat
terminals and only one connector, and I'm not sure where to put it.
There's also a black wire coming off this connector, which goes to a
black rectangular thingy that originally screwed onto the back of the
alternator--but there's no place to put it on this one. Theres also
another red wire coming from the  left, and I think this also goes on B+.

Well--what do you all think?
Sonia J