>This just did not seem to work. I even tried running my fish wire up
>through the existing harness, but couldn't do it. I just couldn't make
>the turn from the roof down the window line.

I have had a lot of luck using copper house (AC) wire to establish a wire
path through all sorts of nooks and and crannies in my 84 Westy.  After I
get the copper "fish" wire from point "A" to point "B", I tie the wire I
wish to run to the "fish" wire and pull her through.

I did not have any trouble making the bend down the front windshield
pillar using this method but had a bit of difficulty getting the wire out
of the pillar under the dash.  Small hands help.  I seem to recall some
kind of bulkhead or metal reinforcement at the top of the door window
frame that necessitated us pulling down the front headliner to better
snake the wire through.  This also gave a shorter run for the dive down
the windshield pillar under the dash.

I'll take a look at my 87 Syncro tomorrow and see if I get any insights
as I realize it must be a bit of a different setup than an 84 Westy!
I'll let you know if any light bulbs go off.

Feel free to let me know if I can be of any help.  I'll be off line a few
days but will get back to you eventually.

Good luck and best wishes,

Tony