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Home >> Mazda >> 1990 >> RX-7 Base, Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heater System >> LOGICON Switch Assembly Testing >> LOGICON Power Transistor Output
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LOGICON Power Transistor Output

Connect voltmeter to 13-pin male connector. Connect positive voltmeter lead to terminal "a" and negative lead to terminal "h". See Figure . Verify that voltage with switch at maximum position is greater than voltage when switch is in the OFF position. If not, check fan amplifier. See FAN AMPLIFIER  under TESTING. If fan amplifier is functioning, replace logicon switch.