The wire harness I put in has a wire for an altinator. If I put one on my truck do I only hook that wire up and tape off the other two?
The reason I am asking is that I put a 235 in and I am going to put an electric fan on the radator. My friend tells me that I will need to put an altinater on to run it . Hew says a genorator won't keep things charged.

Bart