The electric auxiliary fan on my 1998 A4 2.8 does not come on... as a result when stuck in traffic the A/C starts to blow hot. The main fan clutch is also bad but I have that sorted. I pulled the lower dash panel and checked the 40 and the 5 amp fuses, both are ok. I would like to check the relay next but do not know which one it is. Obviously, I don't not have a service manual.

Any help would be greatly appreciated!

Regards,
Bald Bill