How does a cooling fan relay work?
The function of the cooling fan relay is to convert a low voltage signal from either the electronic control module (ECM) or a thermostatically controlled sensor. The cooling fan relay takes the low voltage signal and internally switches the relay “on” to allow battery voltage to be supplied to the radiator cooling fan.
Does an electric fan need a relay?
Most parts stores carry toggle switches and/or push-pull switches that will handle anywhere from 30-60 amps, so that would work. If you’re using one of those thermostatically-controlled deals (or a low amp rated manual switch) you should use a relay.
Why is a relay for electric fan?
Most cooling fans use electric motors that have a moderate to high current draw. As a result, using a cooling fan relay solves this problem. A relay uses a relatively small electric current that can turn on or off a much larger electric current.
Where is the cooling fan relay?
When the cooling fan relay gets its signal from the ECM, the wiring diagram will typically resemble the following illustration. The cooling fan relay is normally located in either the underhood fuse and relay center or mounted to the electric fan assembly behind the radiator.
What is the cooling fan relay for on a car?
A cooling fan relay is used on vehicles that have an electrical fan to cool the engine . The function of the cooling fan relay is to convert a low voltage signal from either the electronic control module (ECM) or a thermostatically controlled sensor.
What is an electrical wiring diagram?
A wiring diagram is a simple visual representation of the physical connections and physical layout of an electrical system or circuit. It shows how the electrical wires are interconnected and can also show where fixtures and components may be connected to the system.