Computer Cooling Fan Wiring Diagram

Video of the day.

Computer cooling fan wiring diagram. The ins and outs of a 4 wire computer fan. Relays shown in these diagrams can provide options. The third wire varies depending on the manufacturer but usually it is blue or yellow. Hayden flex a lite or perma cool brands can provide a 12 volt output when activated.

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. A pc fan s wire colors are pretty consistent with red almost invariably marking the positive and black marking the negative or ground. Most stand alone adjustable thermostats i e.

You can use almost all standard 3 wire cooling fans with this adapter circuit. Used 4 wire fan for these two projects. Suggested electric fan wiring diagrams suggested primary cooling fan single speed on off using 12 volt switching devices only for primary activation note. However for optimum performance it may become necessary to slightly change the values of components c1 r4 and c2.

The cooling fan wiring diagram below is what we ve found to be the simplest and most reliable method.