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Old 03-20-2011, 06:07 PM   #1
deremer
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Default computer fan question

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, 06:15 PM   #2
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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
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, 06:46 PM   #3
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Isnt there three wires because it could be a multi-speed fan?

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Old 03-20-2011, 06:49 PM   #4
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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, 06:56 PM   #5
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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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