[s-cars] Electric Fan not working....

[weski at verizon.net]

I second Peter's comments on the connection behind the driver's side 
headlight.  I had that exact failure last summer on my 95 S6 and it is 
difficult to find it (took the headlight and windshield washer tank out 
to open up access to the area (probably didn't need the reservoir out 
but it did give me more room).

Paul


On 5/13/2013 3:07 PM, Peter Golledge wrote:
> Jim,
>
> On the earlier Audi AC setup (5K/100/200) once the Multifunction 
> sensor overtemp trips the AC is disabled to avoid overheat.  This 
> sensor is not what is used to drive the dash temp gauge so things look 
> "normal".  I would imagine they kept the same setup for the later 
> cars, there should be some guidance on this site I believe:
>
> http://www.12v.org/maintenance/index.php?section=tr&ss=hvac
>
> I did run the issue with the spade connector behind the headlight 
> killing my fan., if you trace the wiring back from the electric fan to 
> the drivers side you will run into it buried deep under the hoses, 
> hard to spot.  I'd start with that and measure the voltage while you 
> are in there... no volts means the problem is upstream.
>
> Testing relays is relatively simple, energize the coil with 12V and 
> measure resistance across the normally open contacts (should be very 
> low), there are some good sources in the net for testing Bosch relays.
>
> Cheers
>
> On 5/13/2013 12:07 PM, Jim Fleischer wrote:
>> Okay guys,
>>
>> I've done a bunch of research on the archives and on Quattroworld and 
>> am still kinda confused as to where to start on this......
>>
>> To recap......coming home last night my Coolant light started 
>> flshing......topped off reservoir with coolant and monitored temps on 
>> the way home, and kept the heat on just in case.  Light continued to 
>> flash, checked 25A blade fuse left side of dash (it's fine) and tried 
>> to get fan to work by putting A/C on (A/C has worked fine in the 
>> past.)  Fan does not come on at all. Drove 15 miles on country road 
>> home, oil and coolant temps at or below normal on way home.
>>
>> Question I have is.....will any of the coolant sensors malfunctioning 
>> keep the fan from coming on with the A/C on, or should I only be 
>> looking at fuses/relays/fan itself?  Without a bin full of relays, 
>> etc, how does one test a relay?  I've heard of a "big ass fuse" by 
>> passenger kick panel, not sure which one this is.  Also there was a 
>> post regarding a blue spade connector behind the drivers 
>> headlight.....any help?  Also, any tips on getting 12v of power 
>> directly to the fan to test it?  I'm not great with electrical and 
>> don't want to short something out.....
>>
>> Thanks all......seems like after around 100K miles of relatively 
>> trouble free driving, I'm encountering a bunch of age/miles related BS!
>>
>> Best regards,
>>
>> Jim Fleischer
>> '95 urS6 avant mit 155K
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>>
>
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