I have the very same question; I have been intending to ask it of the list
for some time.  Those same wires appear on my '91 GL AT and my '87
Wolfsburg AT.  Both these vans have subie conversions, but I am certain
that these wires are original.  There is no evidence of a 'hard start"
relay.
  This is the type of question best posed to Mark Drillock, but he may be
out of touch in Europe right now.

Larry A.

On Wed, Jun 1, 2016 at 11:52 AM, email99@bellsouth.net <
email99@bellsouth.net> wrote:

> I have a question about starter solenoid wiring on an '86 AT full
> Westy.   This has air conditioning but does not have an auxiliary battery.
>
> The #50 terminal on the starter solenoid has two wires connected to its
> electrically identical twin push on spade connectors.  One is a Red
> w/Black stripe large (6.0) wire that supplies current directly from the
> ignition switch ST terminal.
>
> The other is a Red w/White stripe of somewhat smaller size that I can't
> find in the wiring diagram.  Does anyone know what this does?
>
>
> This question is, of course, about original wiring and not an added
> auxiliary load reduction relay.  Also, It not about the battery cable or
> the large (6.0) Red wire connecting to the B+ alternator terminal.
>
>
> Thanks,
>
> Ed
>