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| As a start, you may be unsure of the wires to be inserted into the molex connector as there are some fans that do not have standard red & black colours to define the positive and negative poles. |
You can use a 9volt battery for a simple test to check the polarity of these wires on your fan. Take note of the – and + sign of your battery. |
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| As the voltage is rather small, it will not damage your fan if you connect it wrongly. If you connect the right way, the fan should be rotating. |
Now take note of the polarity. For this example here, the red wire represents the positive pole. |
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| As for the blue wire, it’s the negative pole. Please remember the colours and polarities as we have a guide below to show you how to connect to a 3pin or 4pin molex. |
Now expose some bare wires with either a wire stripper or a pair of scissors. |
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| Now bend the bare wires down as shown above. |
With the bare wires facing downwards, place it in contact with the molex pin shown above. The example here is to crimp on a 3pin molex pin and the same applies to 4pin molex pins too. |
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| Now using a long nose pliers, crimp the top two fins of the molex pin as shown above. |
Apply the same method on the bottom fins of the molex pin. |
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| Now you have it, a well secured fan wire on a 3pin molex. You can choose to solder the top fins of the molex pin to make it more secure. |
We follow strictly the color codes as stated here. However there is indication of which pin to go into which hole of either a 3pin molex or a 4pin molex. |
There you have it. Now apply to the next molex.
