RE: fan switch problem

[Jonas Karlsson <jkarlsso@metabolex.com>]

I don't have the wiring diagrams in front of me, but if my memory is 
correct, then the dual temperature fan switch wiring is like this. The 
lower of the two temp switches is wired to the fan motor through a big 
resistor. That way, the fan turns slower when only the low temp switch 
in on. The higher temp switch is wired to the fan relay, which then 
makes a connection to the fan. The AC switch also activates this relay, 
making the fan run at full speed whenever the AC is on, or when the high 
temp switch is on. 

So, from the problem you're describing, I have the following conclusion. 

1:  The relay is fine, since the AC switch makes the fan go on. 
2:  The problem is in the fan switch/wiring.  

Check that everything is connected, and that the wires are not frayed, 
shorted out, etc, If that is all fine, check the switch. Check for (I 
think) continuity at high temps (just don't burn your hand :-] ). Or you 
could just try and replace the switch and see if it fixes it, if not, 
you've got a spare. :-)

HTH

Jonas
85 Scirocco






Benjamin Harder wrote:
>I don't know what happened, but the radiator fan on my 16v
>has stopped running...the coolant temp keeps on rising with
>no fan kicking in.  However, it does run on high when I run
>the AC, so I know that it's not the fuse or the motor.
>Could my fan switch be bad?  It's the low-temp switch that
>I installed only about 6 months ago!  Also, isn't there a
>relay that controls the fan as well...could this be the prob?
>I would appreciate any help.
>TIA
>
>===
>- - - - - - - - - - - - - - - - - -
>Benjamin Harder
>86 Scirocco 16v
>81 Scirocco (about to get a 1.8 JH!)
>http://members.xoom.com/Scirocco16v/
>- - - - - - - - - - - - - - - - - -
>__________________________________________________
>Do You Yahoo!?
>Bid and sell for free at http://auctions.yahoo.com
>
>
>--
>To unsubscribe, send "unsubscribe scirocco-l" to 
>majordomo@scirocco.org.
>If you experience other problems, email: 
>scirocco-l-probs@scirocco.org
>
>--------------------------
>Status: U
>Return-Path: <majord@neubayern.net>
>Received: (from daemon@localhost)
>	by InterJet.metabolex.com (8.8.5/8.8.5) id UAA05920
>	for <jkarlsso@metabolex.com>; Wed, 25 Aug 1999 20:59:05 -0700 
>(PDT)
>Received: from UNKNOWN(207.225.26.93), claiming to be 
>"mail.neubayern.net"
> via SMTP by InterJet.metabolex.com, id smtpdHZ5894; Thu Aug 26 
>03:58:54 1999
>Received: from majord by mail.neubayern.net with local (Exim 2.05 
>#2)
>	id 11Jqa5-0006bi-00
>	for scirocco-l-outgoing@neubayern.net; Wed, 25 Aug 1999 21:52:05 
>-0600
>Message-ID: 
><19990826035541.28230.rocketmail@web1406.mail.yahoo.com>
>Date: Wed, 25 Aug 1999 20:55:41 -0700 (PDT)
>From: Benjamin Harder <vwtype53@yahoo.com>
>Subject: fan switch problem
>To: scirocco-l@scirocco.org
>MIME-Version: 1.0
>Content-Type: text/plain; charset=us-ascii
>Precedence: bulk
>Sender: Majordomo <majord@neubayern.net>
>
>



--
To unsubscribe, send "unsubscribe scirocco-l" to majordomo@scirocco.org.
If you experience other problems, email: scirocco-l-probs@scirocco.org