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Cake day: 2024年8月25日

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  • 12 volts across the 2 pins would indicate a good ground.

    If you disconnect the plug you should be able to read the motors ohms. It should be low. 2-8 ohms. Open would indicate solid state circuits or open motor Solid state would probable show something in the high K or probably the megs. Open open would be bad windings.

    If the current source feeding the motor is weak, then testing it with an incandescent automotive bulb would let you test the resistor circuit. Resistors would vary the lights brightness. No light and the issue is that way.

    I’m trying to think in my head what could give a false positive 12v indication on the pins. Poor contacts,…


  • Ground for motor could be bad. I’d check that first.

    The motor is a multi speed variable. They used to use resistors to deliver the lower voltages (voltage divider circuits) . Not sure what they use now. Electronic wound be my guess as it would allow for automatic climate to operate the motor speeds.