OK Folks,
I have solved my overheating problem ( fan not kicking on )
As stated I knew fan worked because I hooked it direct from another battery; when I tried to connect to the Audi's battery direct
the fan did not go on -- further searching indicated that I had a bad ground (fusible link under black cover just to right of fan's ground wire) --jumped across broken link --started car to let it heat up and presto fan kicked in and turned off as needed.
Thanks for all the help!!

[sm=closed.gif]

 

I had that link crack in two on hot +90°F day in traffic. I though that the fan brushes were history and the fan is not cheap either. Driving home slowly with all windows open and heater on high was not fun. When home I quickly discovered the broken link and replaced it with 60A Cartridge Fuses- FLB Series the original link was 80A and goes for about $2-3 I have the Audi PN somewhere. The 60A works fine and hasn’t blown yet!

[IMG]local://upfiles/1095/128DBC85B71442878913B069B56A36EE.jpg[/IMG]

 

Okey, My fan turns on too, both first and second. but some times just jumps over to second. Example driving about 30 sec, stop, another 15 sec, stop then the temperature rises to third dot and turns the second speed of fan.
If I drive for example on highway on high speed then water temperature is okey but temperature of oil is also fine about 90-95 C. I heard people when driving high speed, the temperature of oil goes to like 130 and more. I wonder if oil cooler/heater have some restriction or not? Maybe mine is broken and its open through and thats why on low RPM a lot of water goes through oil and not radiator, and thats why its ovearheating.
Replies whould be nice.

 

I finally think pinpointed the problem with ovearheating. the oil cooler transfers to much coolant through.