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 ...

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 ...

When installing an electric fan, it's important to use an electrical relay so you don't tax your charging system too much. Most factory fans pull a lot of amps from the charging system ...

A fan center consists of a transformer with screw terminals which is solder connected to the coil of a relay, both of which are mounted together on a plate. It is not uncommon to find these on modern ...