Hello everyone, and thank you for the effort.
I have a 2001.5 Audi A6 2.7t
173,000 APR Stage 2+

The problem I am experiencing is with my cooling fans. In April 2012 I found my Aux cooling fan not working. After replacement I found my Cooling fan control module was also faulty, I replaced the control module and also the fan switch.
My Aux cooling fan will ONLY come on when the A/c is on, with the condenser fan. They will also only work on a low speed regardless of engine temperature slightly over normal operating temp.
The only way to have the fans run on high speed is to jump the pins for the fan switch, on that note I returned the new switch to napa and got a replacement but still have the same issue. I also checked the big fuse for the fans.

Another side note- After run coolant pump or fans do not come on. Most likely after run thermal switch?

Quick summary
Problem- no aux fan regardless of temp, only low speed with a/c on.
New Parts- fan control module, fan switch, aux fan, battery