Computer Cooling Fan Wiring Diagram

Used 4 wire fan for these two projects.

Computer cooling fan wiring diagram.

Finally note that the connector of a common 2 wire fan has a red and a black cable. The red cable goes to the positive of the power supply vcc and. It uses a 40 amp electric relay and electric fan sensor. Video of the day.

However for optimum performance it may become necessary to slightly change the values of components c1 r4 and c2. Most stand alone adjustable thermostats i e. The ins and outs of a 4 wire computer fan. The third wire varies depending on the manufacturer but usually it is blue or yellow.

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. Suggested electric fan wiring diagrams suggested primary cooling fan single speed on off using 12 volt switching devices only for primary activation note. The cooling fan wiring diagram below is what we ve found to be the simplest and most reliable method. Hayden flex a lite or perma cool brands can provide a 12 volt output when activated.

You can use almost all standard 3 wire cooling fans with this adapter circuit.