Christian picked up a Painless Performance electric fan relay kit with a thermostatic ... find the fan manufacturer's supplied wiring diagram. If you're still not sure, once you've completed ...

Love it or hate it, wiring is a part ... and correct terminals. A relay is used to activate a high-amp accessory with a low-amp switch. An accessory like an electric fan or electric fuel pump ...

This is depicted in the professionally-rendered diagram below. From here you can see that, to use a relay to turn on the electric motor labeled “M,” you ground the negative wire of the motor ...