Regulator? I think the blue wire is connected internally to regulator.
Google should show wiring diagrams of Bosch alternators.

Your regulator may be replaceable:

http://www.van-cafe.com/home/van/page_105_245/voltage_regulator_bosch-_see_description.html

Have you checked voltage at alternator engine on, engine off?

There must be lots of info in the archives on basic alternator tests.     :)

I have read that by the time the regulator or brushes need replacing,
the alternator itself may need rebuilding sooner than later.

Neil.

On Mon, Jul 9, 2012 at 2:35 PM, Gene P <olgreywoof@gmail.com> wrote:
> 87 Wolfsburg
> Runs fine, but battery & OXS lights on all the time = blue alt wire
> issue, right?
> But never mind the wire, there is no power to the spade terminal on the
> alternator that blue wire attaches to -- key on or engine running, no
> power to that terminal.
>
> Is there a better answer than alt gone over the hill?

--
Neil n

65 kb image Myford Ready For Assembly  http://tinyurl.com/64sx4rp

'88 Slate Blue Westy to be named.

'81 VanaJetta 2.0 "Jaco"  http://tubaneil.googlepages.com/

Vanagon VAG Gas I4/VR Swap Google Group:

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines