Fan speed

1989 BMW 750LI
170,000 MILES • V12 • 2WD • AUTOMATIC
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SNAGG 750
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I recently replaced the blower motor and the electronic controls. The blower motor only blows at one speed (med.) What other causes could there be or what else should I consider?I am considering Sword unit or blower motor resistor. Which would you think is more likely? I'm told that there is also a Aux. fan resistor. What is this and does it have anything to do with my problem?
Feb 10, 2011 at 9:21 PM
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WRENCHTECH
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The blower motor resister would be the most likely there.
Feb 10, 2011 at 9:39 PM
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DOCHAGERTY
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No resistor, that model used the "sword" P/N 64118390015
Feb 11, 2011 at 2:24 PM
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WRENCHTECH
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Different name, same job https://www.2carpros.com/images/external/80987364.jpg
Feb 11, 2011 at 2:27 PM
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DOCHAGERTY
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What's in a name anyway...just call it schwartz for that matter.
Feb 11, 2011 at 3:24 PM