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Old 03-20-2011, 05:07 PM   #1
deremer
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Jul 2009
McKinney TX
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I got a computer fan and it has 3 wires, red, black, and white. Do I just cut the white off and use the red and black?

Ben



 
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Old 03-20-2011, 05:15 PM   #2
Catt22
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Jan 2009
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Quote:
Originally Posted by deremer View Post
I got a computer fan and it has 3 wires, red, black, and white. Do I just cut the white off and use the red and black?

Ben
Hook up the wires two at a time. You will find that only one combination works. Process of elimination should get you there. An incorrect hookup won't do any damage to the fan; it will simply not run if not connected properly. There may be exceptions to this, but if so, I am not aware of any.



 
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Old 03-20-2011, 05:46 PM   #3
TwoFortySX
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Dec 2010
Imperial, PA
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Isnt there three wires because it could be a multi-speed fan?

 
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Old 03-20-2011, 05:49 PM   #4
jkarp
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Jun 2008
Elizabeth, CO
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Quote:
Originally Posted by TwoFortySX View Post
Isnt there three wires because it could be a multi-speed fan?
No, normally the 3rd wire is for returning the tachometer signal to the computer. If the fan has 4 wires it's variable speed via PWM.

 
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Old 03-20-2011, 05:56 PM   #5
TwoFortySX
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Dec 2010
Imperial, PA
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Quote:
Originally Posted by jkarp View Post
No, normally the 3rd wire is for returning the tachometer signal to the computer. If the fan has 4 wires it's variable speed via PWM.
Ohh okay



 
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