I just inherited this 96 LHS from my father in law. Great car but it definitely has electrical demons. I replaced the ignition switch to fix the windows and the ABS light.
It is still blowing hot air through the defrost vents. The auto temp control module only back lights on one side and I'm unable to see a temp displayed. Also the buttons will not change the temp or blower speed. The airbag light is also still on. I thought this would be remedied by the ignition switch.

Any ideas? I was thinking a short but I haven't found one yet.

 

I forgot to mention that I have swapped auto temp control modules with no change in condition.