Date: Sun, 5 Jun 2005 13:50:07 -0400
Reply-To: Detroit Bus <detroit.bus@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Detroit Bus <detroit.bus@GMAIL.COM>
Subject: Re: Radiator Fan Motor Low-Speed Inop
In-Reply-To: <BEC89585.1170%camper@tactical-bus.info>
Content-Type: text/plain; charset=ISO-8859-1
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