Date:         Sun, 10 Feb 2013 14:28:55 -0800
Reply-To:     mark drillock <mdrillock@COX.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         mark drillock <mdrillock@COX.NET>
Subject:      Re: All 2 Speed Radiator Fans Use Internal Resistor?
Comments: To: neil n <musomuso@GMAIL.COM>
In-Reply-To:  <CAB2Rwfjcw5SbPJr-KMpVS=3OrxsqA38-yjmqCmo7DHtzzkgw3w@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

The 2.1 models do not use a different fan unless they also have factory
A/C or are Syncros. Those both use a much larger fan motor and lager
wires to feed it with a direct power feed from the battery for highest
speed. The larger fan motor setup uses a resistor to create lower
speeds. A/C models have a 2 speed resistor to create 2 lower speeds in
addition to full direct speed, for 3 speeds total. Syncros without A/C
use a large single speed resistor to create 1 lower speed, so 2 speeds
total.


Bentley page 97.200 shows the Syncro 2 speed large fan motor system. The
various A/C diagrams show the various 3 speed versions.

Mark




neil n wrote:
> Robert Stevens post
> http://gerry.vanagon.com/cgi-bin/wa.exe?A2=ind1302B&L=vanagon&P=R4562
>
> got me looking around my Bentley and the archives.
>
> I installed an '85 rad fan, wiring, etc. into my '81 so you'd think I
> would know this but .....
>
> In Bentley, I see that the diesel and Digijet fan motor have a low
> speed resistor. The 2.1 fan only shows connections at motor.
>
> Do both 2 speed fans have an internal resistor for the lower speed or
> does the 2.1 use different size coil windings to achieve the different
> speeds?
>
> Just thinking ahead.....
>
> Neil.
>
> --
> Neil n
>
> 65 kb image Myford Ready For Assembly  http://tinyurl.com/64sx4rp
>
> '88 Slate Blue Westy to be named.
>
> '81 VanaJetta 2.0 "Jaco"  http://tubaneil.googlepages.com/
>
> Vanagon VAG Gas I4/VR Swap Google Group:
>
> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
>