“The wires all black and grey. How do I tell which is positive and negative?”

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• Grey = positive and Black = negative. Just try using one set of wires at a time and when it spins your good if you don't hook up to the power supply on the first try it should be fine, it was in my case as I hooked up a 12VDC 900mA cell phone charger to the wrong set of wires and then to the correct ones after it didn't work and it's been running perfectly for months now.

  Answered by Bdallas 8 years ago

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• I presume black should be negative, just like in the car battery. The red is positive and black is negative. So, I do not know if it is same thing with the fan.

  Answered by Batterybackup1 8 years ago

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• the power plug is universal --so this is not an issue --unless you plan to splice the wires then im not sure --trial and error --but be aware you may get electrical interference in your cabinet if you do splice

  Answered by DanielR 9 years ago

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• Evidently you aren't using it for it's intended purpose being plugged in to a motherboard... It's just an electric motor. Plug it in. If it spins the wrong way switch.

  Answered by KevCha 9 years ago

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• There should be a plastic piece on the motherboard fan header. Line up the connector with that piece and that should be the the right charge to each.

  Answered by RyanE 9 years ago

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• This product has a plug that can only be plugged in the correct way.

  Answered by CommunityAnswer 9 years ago

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• This fan has the 4-pin connector. The connecters will make sure all the wires get connected correctly. Removing the 4-pin connector is not recommended.

  Answered by InsigniaCustomerSupport 9 years ago

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• There should be a white strip that goes down the side of one the wires. That will tell you if witch one is Positive.

  Answered by Jreeves 9 years ago

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• The connector will have a inward or protruding notch so that you are not able to plug it in backwards or in reverse

  Answered by 8I8H8O8 9 years ago

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