One suspect... I'm not saying this  is right though...

a blue/green wire is listed as going from connection K5 ( connector
block, round prongs, back of fuse panel), to coolant level low
warning switch via connector T7a/3. But T7a/3 is, I think, in engine
compartment.

K5, according to wiring diagram, is linked (within fuse box) to
connector B14, which is another round prong connector in a connector
block on back of fuse panel.

this does not seem to make any sense with the dangling wire you mention.

wait, hold the phone, another blue/green shows as connecting to C11
on back of fuse panel, but no, C11 is a round prong connector in
multiconnector block. This wire goes to ox sensor elapsed mileage
counter...

hey, no charge for muddying the waters.

cheers

alistair

On 18-Mar-10, at 6:10 PM, Gerald Masar wrote:

IN my '88 Westy, behind the fuse panel, is a single blue/green wire
with a white,
kind of square nylon female connector on the end, not connected to
anything.
It is very difficult, in that rat's nest back there to see, but I
don't see anywhere it
should connect to. It comes out of a small bundle with red/gray,
brown/blue and
gray/black wires, and those wires go into some as yet unidentified
connector on the
back of the panel.
The van is '88 Westy, with AT, power mirrors, power door locks, power
windows and
cruise control.
I have a Bentley, but my mind is drawing a blank these days. This is
the "cranks, no
start" van, but I will try to summarize what I have done in another msg.
So, any idea what this wire might be for?
Thanks,
Jerry