Computer Cooling Fan Wiring Diagram

The third wire varies depending on the manufacturer but usually it is blue or yellow.

Computer cooling fan wiring diagram.

You can use almost all standard 3 wire cooling fans with this adapter circuit. Start your wiring project by taking both of the positive wires from the fans and run them to the yellow wires on each relay tab 87. Relays shown in these diagrams can provide options. You don t need it to make the fan turn but the third wire is there for a good reason.

The red cable goes to the positive of the power supply vcc and. A pc fan s wire colors are pretty consistent with red almost invariably marking the positive and black marking the negative or ground. The cooling fan wiring diagram below is what we ve found to be the simplest and most reliable method. Used 4 wire fan for these two projects.

It uses a 40 amp electric relay and electric fan sensor. Finally note that the connector of a common 2 wire fan has a red and a black cable. Suggested electric fan wiring diagrams suggested primary cooling fan single speed on off using 12 volt switching devices only for primary activation note. The ins and outs of a 4 wire computer fan.

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