How to wire an electric fan with an AC trinary switch. UPDATE
NOTE: This video has been edited and re-uploaded due to what was a mislabeled component in the video. Thanks to all that made us aware of the error in the comments section.
A trinary switch will allow your electric fan to turn on and off based on either engine temperature or AC system demand. Keep your engine and yourself cool by wiring a switch into your American Autowire 500479 universal relay kit!