C'mon guys, this is classic thread hijacking. The OP asked how to fix the whine in the motor, not load reduction. I want to know the answer also. 
�
Robert
1982 Westfalia
�

--- On Mon, 1/25/10, David Beierl <dbeierl@ATTGLOBAL.NET> wrote:

From: David Beierl <dbeierl@ATTGLOBAL.NET>
Subject: Re: heater fan whine
To: vanagon@GERRY.VANAGON.COM
Date: Monday, January 25, 2010, 7:16 PM

At 05:58 PM 1/25/2010, John Rodgers wrote:
>This thread brings to mind having seen somewhere something about using a
>relay(relays) to reduce the load on the front heater control switch.
>
>Anyone have a link showing this???

Use the high-speed position on the switch to drive the 86 terminal on
a 20-amp relay; ground the 85 terminal.� Use the 87 terminal to drive
the high-speed wire to the fan.� On a 2.1l feed the 30 terminal from
the switch feed wire, but on a 1.9l run a separate fused circuit to
feed the 30 terminal.

The two lower-speed positions aren't overloaded so they don't need any help.

Yours,
D