Electric Fan Conversion

In the off-road world Electric fans are king. They give you the ability to move air at a high-cfm while moving at slow speed or no speed, they do not rob precious tourque from our engines and they are exceedingly more reliable than the fan clutch. For those of you who want to convert to electric fans on a flex-fan budget, this article is for you.

A more up-to-date version of this article is here.

Supplies Needed | Electrical Diagram

First, remove your old fan and fan shroud. Put your old fan aside or toss it in the garbage, depends on your prefrence. Be sure to tighten the bolts back on the water pump. You need not to remove the fan belt to do this.
	Next place the electric fans inside the stock shroud. Using self tapping screws secure the electric fan shroud to the stock fan shroud. You may want to use some "L" brackets to secure the top half of the electric fan shroud to the stock shroud. Another suggestion is to close in any gaps between the stock shroud and the electric fan shroud using sheetmetal, plastic or even some wood.
Install the tempature switch and route the sensor into the fins of the radiator, be sure the wire isn't around any metal.
	Install your shrouds onto the radiator. Ziptie the wires onto the shroud so it doesnt get caught in the accessory pullies.
Run you wires for the tempature switch and the hot leads from the batteries according to the wiring diagram I have created. The overide switch and the LEDs are optional. A good source for Key-On power is the cruise control power lead (Purple wire on 92-96 Bronco/F150s).
	After all the wiring is routed and secured start the motor and adjust your temature switch so they kick on at about 180-190*.
If everything tests OK then go for a drive and note the tourque/power increase. Be sure to run with the A/C on (If equipped) to test the fans under load and keep an eye on your temp gauge. My experiance has been these will compensate for most condtions except for the hottest days with the A/C on. Then again my truck also has 173,000 miles on it so things dont quite work as well. :)