Question about 1998 Cadillac DeVille

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'94 Cadillac DeVille Concourse. My winsdhield

'94 Cadillac deville Concourse. My winsdhield defrost fan will not shut off even when I turn the ignition off. I have to unplug the wires from the blower under the hood to get it to turn off. I have tested the hot and ground in the wire plug and they test fine. When the blower is unplugged the ac/heat also do not work. When the blower is plugged in it will not stop but I can operate the ac and heat separately meaning the ac blows cold through the dash vents and the heat blows fine depending on which I select and what temp I select.

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Follow the wires from the blower motor back to the blower motor resistor, normally only a few inches away and held in by a 7 mm screw. Replace it

Posted on Oct 13, 2012

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Bad relay go ahead and check relay. If its not the blower module may need to be replace

Posted on Nov 26, 2012

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OK, the relay for the blower motor needs to be replaced, or the blower motor module.

Posted on Sep 20, 2010

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