-----Original Message-----
From: Wade Shen [mailto:swade@umiacs.umd.edu]
Sent: Wednesday, December 04, 2002 2:54 PM
To: 'SStones'
Subject: RE: radiator fan not cycling 87 Westy

Yes, I mean on the harness not the switch.

Wade

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf
Of SStones
Sent: Wednesday, December 04, 2002 1:39 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: radiator fan not cycling 87 Westy

At 12:50 PM 12/4/02 -0500, you wrote:
>Do a fan test first by
>removing the electrical harness at the fan thermoswitch and shorting
>the low and high speed terminals to ground.  If your fan turns on, then

>you can rule out the relay and the fan motor.  If the low speed doesn't

>work but the high does, I'd check the Fan Resistor. If both work, then
>it's either the thermoswitch or a coolant bleeding problem.  If neither

>work, then you'll need to check the voltages of the high and low
>terminals to determine if it's the relay or the fan motor.

Wait a minute.  You might not want to do that.  The thermoswitch is on
the Positive side of the fan motor.  You don't want to accidently ground
wire #3. (Red with White), and grounding either of the others would just
be grounding both sides of the motor, wouldn't do much.

One way to test the fan would be to take the connector off of the
thermoswitch and jumper the leads to each other to simulate the closing
of the switch positions.  Red/white to red/black for low speed. Red
white to both red/black and red/blue for high speed. If the fan never
comes on at all, it's not just the relay. Low speed can operate without
the relay. That 30 amp fuse might be the best thing to check second.
Page 97.116 of the bentley being first.