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Wiring A Computer Fan

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Batz

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Guys,

I'm rebuilding my chesty and scored two new 12v computer fans. Now these have 3 wires that are not colour coded. You guys know how to wire them to my transformer? Last ones I have only had two wires.

batz
 

kelbygreen

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you will only need 2 of the wires I think on mine the yellow one was not used. I dont have a fan setup ATM so cant remember the other wires hook them up and see it shouldnt hurt them it you hook it up wrong, Pretty sure it took me a few goes when I done it.
 

Gar

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Don't quote me on it but I think the third wire is for an RPM sensor (and isn't needed in your case)
 

keifer33

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You only need the two wires. They should always be in the same place so if they have the connector like the one below then its just the 2 on the left being black and red.

IMG_20120428_090825.jpg
 

cspencer

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Guys,

I'm rebuilding my chesty and scored two new 12v computer fans. Now these have 3 wires that are not colour coded. You guys know how to wire them to my transformer? Last ones I have only had two wires.

batz

looking at my computer fan the negative is the middle wire. One of the wires will be a RPM sensor and not required. hope it may help
 

Batz

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Cheers guys I try it out, as I said the wires are not colour coded and even I being very colour blind can see that.
I'll try it when I get home, off to the Maleny brew Crew now...perhaps tomorrow would be a better time. :chug:

Thanks

batz
 

stux

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Only a few combinations :)

Remember PC fans generally only work in one polarity so try each combination each way ;)
 

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