Up for sale is a good functional Saab 900 Dash dimmer switch.  This fits most of the new generation Saab 900 models, 1994 and up.  This is the unit that dims the gauge cluster lights, located to the left of the gauge cluster. These are reasonable easy to exchange. Pop it out, and plug in the new one.  I have tested this unit for correct resistance with an ohm meter and it works properly through it's working range. It will come to you as seen. These are starting to be hard to find in good working condition, $122 from Saab, 1/4 that here. Bargain alert!!! Keep your vintage Saab going.