A/C controls not working - 2000 Blazer
 

This is a "Computer Climate Control" system.

The yellow lights do not turn on for the a/c button or the recirculating button, the fan speed dial does not do anything nor does the hot/cold dial.

I tried replacing the blower motor resistor but that had no effect. The blower motor works if I power it directly.

All fuses appear to be fine.


Has anyone run into this or a similar issue?