2001 Mitsubishi Diamante Q&A
2001 Mitsubishi Diamante Question: No interior air flow.
Are you referring to the HVAC blower motor not operating? - Chevy Power
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. - ziptie12