Originally Posted by DaJokr
Whats the point of removing the stock fan and replacing with 2 electric fans? And as asked above, do these fans automatically activate or do they need a switch installed in the cab to turn them off/on?
The stock fan is driven by the engine and takes power to drive (resulting in less power to the wheels and worse gas mileage).
The controller turns the fans on when the sensed temperature reaches a preset level, and off when it gets back down to a lower preset level. His switches are just for overriding the controller if he wants to.