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How to Wire a 12 Volt Fan

Wiring a 12 volt fan is possible in any environment were 12 volt batteries are the power source. Whether a boat, automobile or house battery bank is the power source, the methods are the same for wiring a fan or any other of a long list of 12 volt appliances. Only two wires, a positive and a negative, are necessary. Properly sized wire is also necessary to control the voltage drop from the fan to the power source.

Instructions

1

Measure the distance from your battery source to the location of the fan. Include in the length any turns or extra footage required for the route. Refer to a wire chart to select the proper gauge and type wire for your project. Marine applications require different considerations than land-based wiring of 12 volt fans.

2

Disconnect the battery by removing the cable to the positive terminal. Attach one end of the positive wire to the cable that will be reconnected to the positive side of the battery. Attach the other end to the positive connector on the fan. Attach one end of the negative wire to the negative connector on the fan, and attach the other end to a ground location or the negative side of the battery.

3

Reattach the batterys positive cable to the battery terminal. Test the fan by flipping the on and off switch.

4

Attach the wires at several locations along the route with wire clips to prevent the wires from chaffing or being damaged later. Place them behind trim to hide them from view.