We show you how to wire in an electric fan relay kit with a thermostatic switch. If you've got an electric cooling fan on your classic car or hot rod and you want to know how to wire it with a relay, ...

Can be wired off a relay and triggered by the ignition switch, thermal switch, or ECM. Cons: Fan speed is limited to around 5k RPM (make/model dependent), the brushes will “float” above that speed.

We show you how to wire in an electric fan relay kit with a thermostatic switch. If you've got an electric cooling fan on your classic car or hot rod and you want to know how to wire it with a relay, ...