Overview:
Below is a complete writeup for a reliable robust electric fan and controller setup for a second generation Tacoma that I built. Most of this is universal and could be implemented on any vehicle. I am not going to go into great detail on things covered in the vehicle manual or common how-to skills mainly to keep this from being a thirty page write-up, Google is your friend. I tried very hard to pass along the pertinent information without getting down in the weeds or boring you with unimportant text.
Anyway, the recipient:
The main benefits I wanted to get was increased fuel economy, better cooling offroad at low speeds, and the ability to disable the fans for water crossings. My requirements for the system were: reliability on par with OEM installations, function like factory electric fans, utilize high efficiency fans, provide appropriate airflow for cooling, and not draw excess electrical power. The control should be automatic but able to be overridden off or on with the current status indicated in the cab with a clear warning if the system is overridden off. The system should be robust for use on and off road and the portion exterior the cab should be water resistant.
Disclaimer: If you decide to pursue this, do so at your own risk. I am not responsible for you and your actions. This is not a simple project and if not done correctly you risk hurting yourself, hurting others, and/or destroying your vehicle. I am posting this for free out of the goodwill of my heart, and will do my best to answer questions posted in this thread. However since this isn’t my job and I am not going to make a penny off of this I cannot answer detailed technical/installation questions or hold someone’s hand through a conversion. I have no desire to make or sell any of these items.