After just experiencing multiple failure points with my radiator fan, I know
the 87 scheme intimately. In short, both the radiator switch and the AC low
speed use the same resistor. The radiator high speed activates that direct
feed relay putting the fan in turbo high noise mode.  The AC high pressure
switch adds the second part of that resistor to get that almost noisy fan
2nd speed. The 2nd speed is only activated by the AC.  You may be right on
the resistances although .09 seems like why bother.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
mark drillock
Sent: Sunday, July 28, 2013 9:50 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: afordable alternatives RE: Radiator fan resistor

I have a spare 2 stage resistor from the 3 speed rad fan setup for 86+
factory AC. It is marked .27 ohms and .09 ohms.

I think they are connected in series for low speed, so .36 ohms.
Don't whether med speed is .27 or .09

I also have a spare 1 stage resistor from the non-AC Syncro 2 speed rad fan
setup. It is marked .365 ohms.

Mark

Larry Alofs wrote:
> Dennis,
>    Why won't they burn out?  How are they more capable or durable than
> the original?  Will they survive for 10 or 15 years behind the headlite?
>     I don't recall the exact resistances of the two sections of the
> original resistor, but it seems to me they were quite different.
> It's not obvious to me how to use two 1 ohm resistors.
>
> Larry A.
>
>