Shadow digital automotive radiator fan controller

Engine Cooling Fan Controller can Coolant Engine Fastly.

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Shadow digital automotive radiator fan controller Supplier | Shadow

Based in Taiwan, AUTO JAW CO., LTD., since 2004, is a racing gauge and automobile meter manufacturer in the automotive electronics industry. Main product, including Racing Gauge, Boost Gauge, Electronic Throttle Controller, Digital Electronic Boost Controller, Chip Tuning, Turbo Timer, OLED Multi Display, OBD2 Digital Display and so forth.

99.43% in product yield rate, major in automotive electronic modification and reverse engineering. All automobile meters and gauges are manufactured with a series of tests, ranging from environmental simulation test, accuracy correction, actual vehicle test, programming test and assembly test.

Shadow has been offering customers high-quality Racing Gauges & Automobile Meters since 2004, both with advanced technology and 16 years of experience, Shadow ensures each customer's demands are met.

Shadow digital automotive radiator fan controller


Engine Cooling Fan Control Module

Engine Cooling Fan Controller can Coolant Engine Fastly.
Engine Cooling Fan Controller can Coolant Engine Fastly.

Shadow digital automotive radiator fan controller which also called Radiator Fan Thermostat Control Relay Wire Kit has equipped with a temperature sensor to monitor the cooling water temperature. It allows the user to manually adjust the start-up temperature of the Electric Radiator Cooling Fan to maintain the vehicle temperature and performance.

Shadow digital automotive radiator fan controller action principle

The water-cooled engine coolant system used in automobiles let the air flow through the radiator to achieve engine temperature control and cool down the cooling water. However, if there has no enough air flow, every vehicle has equipped with electronic radiator fan, and the original factory set the water temperature fan to start at 95~100℃.

In order to enable the radiator fan to turn on early and achieve the purpose of improving engine performance, Shadow digital automotive radiator fan controller can be set to start the fan in the range of 70°C to 100°C. The control kit includes user interface unit, signal feedback unit and drive unit.

Shadow digital automotive radiator fan controller has monitor and thermostat function.

The difference between Shadow digital automotive radiator fan controller and radiator fan switch

Digital automotive radiator fan controller has a temperature monitoring display and an adjustable interface which can corresponds to different terrain and road conditions and allows users to dynamically adjust the temperature anytime and anywhere.

◆feedback unit: Signal feedback unit: Use high-specification electronic coolant temperature sensor (CTS) to return the temperature to the control interface unit for operation judgment. At the same time, the oil temperature and battery voltage can be additionally monitored. There has three data can be switched.

◆User interface unit: User interface unit: Display the current water temperature value and allow the user to set the start value (built-in memory function). The controller will send out an execution/stop signal (the number will flash to indicate).

◆Drive unit: After DC12V Electro Magnetic Relay receives the signal from the control unit, it will turn on the current to make the fan run. The fan will stop operating when the temperature is 5°C lower than the specified temperature.

Compared with the fan thermostat switch, it is simply installed in the engine room to adjust the temperature dial to change the resistance so that the fan will run after reaching the specified temperature. But it can’t adjust dynamically and brings a lot of inconvenience in operation. Therefore, Shadow digital automotive radiator fan controller improves the above description and strengthens the operation interface and product feedback.

The aftermarket fan switch can’t dyno tune and display.


  • AUTO JAW extracts the cooling fan of the original vehicle for product development. We know that the cooling system of plays an important role in the safety and performance of the vehicle. Engine cooling fan controller does not require excessive disassembly and modification of the engine parts of the vehicle. It only needs to insert a temperature sensor and connect the control element to the fan of original vehicle to start the heat dissipation before the original setting and increase the heat dissipation rate to 43%. It is suitable for all 12V vehicles.


  • Engine cooling fan controller can be controlled to start at 70°C ~ 100°C.
  • Monitor water temperature, oil temperature and voltage at the same time.
  • Warning set with number flashing as warning signal.


Power Cable50cm
Control Box - Relay Cable180cm
Relay- Fan Cable180cm
Sensor Cable190cm


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