Defogger Switch Test: Millenia

Remove A/C amplifier/climate control unit assembly. Separate climate control unit from A/C amplifier. Check continuity between climate control unit connector terminals "F" and "Q" with rear defogger switch depressed. See Fig 1 . If continuity exists, climate control unit is okay. If continuity does not exist, replace climate control unit.

Fig 1: Identifying Climate Control Unit Connector Terminals (Millenia)

Courtesy of MAZDA MOTORS CORP.