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Home >> Mazda >> 2000 >> MX-5 Miata L4-1.8L DOHC >> Repair and Diagnosis >> Heating and Air Conditioning >> Relays and Modules - HVAC >> Control Module HVAC >> Testing and Inspection
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Control Module HVAC: Testing and Inspection

A/C Switch
1. Remove the climate control unit.




2. Inspect for continuity between the A/C switch terminals using an ohmmeter.
3. Connect battery positive voltage to terminal C and ground to the terminal A.
4. Turn the A/C switch on.

5. Verify that the LED illuminates.
- If not as specified, replace the A/C switch.

Fan Switch
1. Remove the climate control unit.




2. Inspect for continuity between the fan switch terminals using an ohmmeter.
- If not as specified, replace the fan and rear window defroster switch.
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