Coupe Quattro wipers wiring diagram

[radek at uniserve.com]

Hello all Audifans;

Would anyone have a wiring diagram for 1990 Coupe front wipers?  Ever  
since I switched out of Windows XP I can't access the Bentley I have.

Mechanically the motor works and the wipers are moving when connected  
directly to power.  We tried three different column switch sets and a  
couple of intermittent relays and still no-go.
Thanks,

Radek.