Fuses seem to be intact. What else could be the problem?
No interior air flow. on 2001 Mitsubishi Diamante
If you're checking this yourself , possibly you can get a service manual for the system diagram. You have several other things that can be checked.The switch(is it auto-climate control), the blower motor relay, the blower motor resistor/transistor and all wiring in between any of those items.And a volt/ohmmeter (multi-meter)would be more useful than a testlight.The more info you have for the control system the easier it would be.
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Are you referring to the HVAC blower motor not operating?
Yes. Wasn't sure of the technical term, but that is correct.