Question about 1999 GMC Jimmy

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The blower motor for the heater is pouched i think.it used to work by tapping it.now nothing.what to do?

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  • kristinechap Dec 30, 2010

    problem solved thx

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Buy a new blower motor, the brushes are toast in the one thats in ur truck, good luck

Posted on Dec 31, 2010

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1 Answer

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1 Answer

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I would check the blower motor fuse first. If that's all fine, than check at the blower motor connector (behind the glove box). unplug the connector (white connector with 2 wires red and black I think) and unplug it. Turn the fan control ON. Get a DVOM (digital volt meter) or just a plain old analog meter and check across the connector. You should have some reading, while you are using the blower controls by the radio. The faster you wabt the blower motor to go the more voltage there willl be on the meter and vise versa. So in other words on full HIGH the meter should read about 12V. On LOW the meter will be down to 6V or so. The speed adjustment of the blower motor gets done by the "blower motor resistor" and the controler by the radio. Anyways, let me know what you find as far as the voltage goes at the blower motor. OR you can just turn on the control on high and tap the motor with something solid (hammer) and see if it comes on. I have a feeling that it will.

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