Have you guys looked at this troubleshooting guide I made up?
http://www.vanagain.com/troubleshoot-your-radiator-fan/

Might help you out.

Ken Wilford
John 3:16
www.vanagain.com

On Mon, Jan 23, 2017 at 12:46 PM, Gordon <gordonmahung@gmail.com> wrote:

> Piggyback-Ing on this thread on behalf of my 89 with similar problem of
> fan not coming on.  Mark, do your comments apply to the 89 as well?  Or
> should I be looking elsewhere?
>
> - g
>
> > On Jan 22, 2017, at 4:15 AM, vw_van_fan_Mark <madvws@COX.NET> wrote:
> >
> > There are 3 versions of rad fan wiring for 86. There are separate
> > diagrams in the Bentley for each version.
> >
> > Only 1 version used the relay in position #5 for the temp switch high
> speed.
> >
> > The other 2 versions used a stronger relay mounted separately higher to
> > the left, above the ground stars. There is a strip fuse there too, on
> > the base socket of the relay. If you have one of those versions, maybe
> > that fuse has blown?
> >
> > The rad fan temp switch doesn't know how hot the engine is, it only
> > knows how hot the radiator is. If the hot coolant flow to the radiator
> > is too small then the engine can cook but the fan won't come on. How hot
> > is the top passenger side corner of the radiator? That is the last part
> > to get hot.
> >
> > Mark
> >
> >
> > thewestyman wrote:
> >> Hi all,
> >> Looks like I need a little help from the gurus.
> >> ‘86 Vanagon.
> >> Just flushed the system, changed the rad. switch, filled in new
> coolant, bled the system, ran the engine until hot.
> >> The temp goes high and I’m waiting for the fan to start but it does not.
> >> But if I short it at the plug of the temp switch of the radiator, it
> works.
> >> Although the second stage I could not make work the same way.
> >> Looking at the wiring in the book, I can’t find solution.
> >> I thought, the new switch would do it.
> >> Changed the relay at the #5 spot, as it is shown on the drawing.
> >> But nothing worked.
> >> Anyone has any idea?
> >>
>

-- 
Thanks,
Ken Wilford
John 3:16
www.vanagain.com