Hi Steve,
At 08:21 AM 11/5/2009, zzyzx wrote:
>Is the voltage regulator internal on a stock 1982 air cooled vanagon
>alternator?

Yes.

>Where does the blueish green wire run to out of the back of the alternator?

The two 12-ga red wires run in parallel from the B+ alternator
terminal to the 30 terminal on the starter, where they connect to a
1-ga wire to the battery.  The blue wire goes from the D+ terminal to
the alternator light circuit in the panel.  This circuit is
dual-purpose; as well as warning, it's also needed to start the
alternator charging.  Bentley 97.20, current tracks 28-32.

Yours,
David