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bennelson I'm with you here. I put an e-fan on my b2300 mazda (ford ranger) and the fan never turned on except when i turned on the a/c or was sitting in traffic a long long time, also when playing in the dirt. Back then I did it for performance, not economy. As long as a vehicle is traveling at least 20mph, the airflow is enough to cool the radiator.
some ecus do have a fan control pin, even if the vehicle has a belt fan.
I used a performance 5.0 mustang fan i had left over when i sold it. It had a thermoswitch, an additional a/c turn on relay AND a manual override.
You can swipe the switches out of cars that came with e-fans from the junkyard.
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