I have a 1992 Audi 100 and the dash lights and enviromental control back lights are inop. I checked all the fuses on the driverside fuse block and they all checked good. I removed the dash and ohm'd the dimmer **** with a multi-meter and it checked good. What else do I need to look at?

 

Did you check the dimmer potentiometer in circuit or by itself?

 

I checked it by itself. I ohm'd the two contacts on the back. How do I check the whole circuit?