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 ...

The Black Magic fan comes with its electronics and relays encased in an onboard controller. A few wires need to be routed and connected, and the thermocouple has to be placed in the radiator.

Note that we tested the fans mounted to a dummy radiator to create a more accurate airflow and amperage draw. See All 14 Photos Eric found a relay box online that would mount four Bosch 30-amp ...