Sorry, one more thing-- the reason I'm suspicious of the fan motor is
that its already been replaced once...or at least I think it has,
since it says "Made in Germany" and not "Made in West Germany"...

On 6/5/05, Detroit Bus <detroit.bus@gmail.com> wrote:
> Thanks Jim.
> 
> I've actually never turned on the A/C, since it needs a recharge and
> I'm not an A/C sort of guy, but I'll go down and give that a shot. Its
> my understanding that the low speed setting operates independently of
> A/C, just goes on at a lower coolant temp than high speed.
> 
> But anyway...the original question still stands:
> 
> Since I've already jumped the radiator sender switch, and fed 12V
> directly to the red/black low speed lead which has continuity all the
> way to the fan motor's positive terminal, and the fan does not
> respond, what does this mean?  And why is there only one positive
> terminal when the Bentley implies there should be two?  And why are
> there no part numbers in the $79 Bentley manual??!!?? sorry just
> venting there.
> 
> garrick
> 
> 
> 
> On 6/5/05, jimt <camper@tactical-bus.info> wrote:
> > There are two things to check for the low speed.
> >
> > If the fan low speed does not operate but high speed does and
> > If vehicle is air conditioned, turn on the AC.  If the fan comes on the
> > circuits are good and the sender in the radiator is bad.  It has a two stage
> > switch in it.
> >
> > If the AC fan does not come on then the resistor pack is probably bad.
> > Found usually behind the headlights on most vehicles.
> >
> > If not AC equipped check the resistor pack and the switch in the rad.
> > jimt
> >
> >
> > On 6/5/05 11:03 AM, "Detroit Bus" <detroit.bus@GMAIL.COM> wrote:
> >
> > > Hello from 90 degree NYC:
> > >
> > > Why does the Bentley wiring diagram for an 87 show two positive posts
> > > on the radiator fan motor, when my fan motor has just one positive
> > > post and one negative post? Both hot leads are combined in one
> > > connection at the positive post on my motor, 251959455M. My vanagon
> > > has A/C.
> > >
> > > How does the fan motor know whether to go high speed or low speed? My
> > > low speed option isn't working and i'd like to fix it.
> > >> > I get 12.1 volts on the lo
> 
> w speed lead and 12.6 volts on the high
> > > speed lead  when I jump the radiator thermoswitch (red/black wire and
> > > red/blue wire, respectively). If the single positive post is correct,
> > > does this mean I need a new fan motor? Or should the low-speed voltage
> > > be higher than 12.1? High-speed works fine: the relay clicks and the
> > > fan spins very nicely.
> > >
> > > I've searched the archives and apparently there was something about
> > > this on Ken Wilford's site at one time which I can't find.
> >
> >
> 
> 
> --
> Garrick, Queens, NY
> '87 GL Weekender
> 
> *****
> With fond remembrances of:
> '77 Beetle
> '67 Bus
> '59 Pickup sn# 460440
> '67 Beetle
> '76 Camper Bus
> 

-- 
Garrick, Queens, NY
'87 GL Weekender

*****
With fond remembrances of:
'77 Beetle 
'67 Bus 
'59 Pickup sn# 460440
'67 Beetle
'76 Camper Bus