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electric fans

Depends what you want to do to turn them on and off...... The contour kit has some relays built into the shroud; and I think others have adapted them to make it a two stage fan kit (I didn't). I bought the Flex-a-lite VSD fan controller. It certainly isn't the least expensive way to wire it up.

I bought a replacement OEM ford connector for each fan motor; because I wanted a really good tight connection that would stay connected (they were just a bit more wear and tear on the one that I pulled than I would have liked).
 
If you pull the contour fan from the yard, grab the harness up to where it goes into power distribution box. The shroud doesn't have any relays in it, but it does have a big 'ol resistor in it that you will want, along with the weathertite connectors for the resistor and the motors.

How you get low speed vs high speed for this unit, is whether you power it through the resistor or not. Power through resistor to motors = low. Power straight to motors = high.
You can make it as simple or detailed as you want. Here is how I did mine:

Contour_Fan_Wiring_zpsfc112fe5.jpg
 
cbford said:
If you pull the contour fan from the yard, grab the harness up to where it goes into power distribution box. The shroud doesn't have any relays in it, but it does have a big 'ol resistor in it that you will want, along with the weathertite connectors for the resistor and the motors.

How you get low speed vs high speed for this unit, is whether you power it through the resistor or not. Power through resistor to motors = low. Power straight to motors = high.
You can make it as simple or detailed as you want. Here is how I did mine:

View attachment 57693
Click to expand...

That's great info, wish I had of know this when I did mine, apparently mine are both high speed fans. Wired them through a toggle switch then a relay and that's all. so as long as the ignition is on and the toggle is on they are on. Might have to redo it to this wiring, maybe even with a temp controller.
 
If all you want is on/off, you can use a temp switch as a "sender" (can buy type to screw in where sender goes) and it will close relay for you. Then you have auto off/on based on temp.
You could keep your toggle switch inline to have a master off for system too.

I used the Dakota digital unit because I wanted the data port for tuning, the digital temp readout on controller and plan to use the AC clutch function as well.
 
The power gain may be accurate from a non-clutched fan to an electric but it is much less of a gain with a clutch fan that uses very little HP to run since there is slippage. Ian Johnson did a test on this a few years ago on Extreme 4x4. He stuck with the clutch fan to simplicity and reducing the alternator load especially when using a winch and then the fan running at the same time. Not saying his word is gold but the show opened by eyes up on the gains to be had from each style fan to an electric version.
 
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