Alright, I'm installing a e-fan on my truck. I have heard that its a good idea to put in a freewheeling diode to protect the relay I'm using. What is the difference between a diode and a freewheeling diode, and how do I wire a freewheeling diode?

 

Found how to wire one.

https://www.f150online.com/forums/me...4-fw-diode.jpg

 

Here's a better one.