$0.25 says it is the headlight switch - pre 1980 Rabbit / Scirocco / Audi
Fox switches are the same.  New switches are $30 CAD / $20 USD if you want
to get one from me.

At 03:55 PM 30/03/2000 GMT, Mike Finkbiner wrote:
>Volks -
>
>The headlights on my '87 Westy stopped working.  I can flash the high beams
>with the stalk, but lows don't work at all.  The fuses are OK.  Thw switch
>feels fine
>
>I checked the archives and found that the headlight switch and ignition
>switch are the two most likely sources of the problem, so I pulled the
>headlight switch and jumped across the connections.  With jumper wires in
>place, the lights work.  Interestingly enough, they work even with the
>ignition off.  Previously, when I turned the ignition off, the parking
>lights stayed on, but the headlights turned off.  There must be something
>else going on that I'm not aware of.
>
>At any rate, on the back of the switch are six pins, four small, two large,
>like this -
>
>            a                     E
>
>
>            b        c            F
>
>                     d
>
>Looks like a and b is where power comes in, c is for the parking lights, d
>is for the rheostat, and the large pins E and F are for the headlights.
>
>With the switch off, a - c or a - E does not have continuity.  With the
>switch in the middle position, a - c has continuity but not a - E.  In the
>left (all on) position a - c works, and a - E is still dead.   That's what I
>expected to see if the switch was defective.
>
>There were postings about fixing the switch and it looked like it had been
>taken apart before, so I pulled the back off, expecting to see problems.
>Everything looks good!  One of the headlight contacts was a bit dirty, so I
>cleaned it and reassembled, but still had the same results.
>
>Am I overlooking something?  Should I just spend the $50 and buy a new
>switch?
>
>- Mike Finkbiner
>'87 Westy
>Moscow, ID
>______________________________________________________
>Get Your Private, Free Email at http://www.hotmail.com
>
>

--   David Marshall -                    - Quesnel, BC, Canada   --
--    78 VW Rabbit, 80 VW Caddy, 84 VW Westie, 85 VW Cabriolet   --
--       87 Audi 5000 Quattro, 88 2.0L VW Syncro Double Cab      --
-- David's Volkswagen Home Page        http://www.volkswagen.org --
-- Fast Forward Autobahn Sport Tuning  http://www.fastforward.ca --
-- david@volkswagen.org (pmail) or vanagon@volkswagen.org (list) --