175-185 Degree Car Cooling Fan Thermostat Switch Car Fan Relay Harness Kit 12v Automotive Fan Car Accessories This kit includes a thermostat switch and relay harness designed to control the of a car's cooling fan based on engine temperature.The thermostat switch activates the fan within a temperature range of 175 to 185 degrees Fahrenheit, helping maintain engine cooling.Compatible with 12-volt automotive electrical systems, the harness provides a connection between the fan, relay, and power source.Designed for straightforward installation, the components support proper thermal management in vehicles equipped with electric cooling fans.