Specification: Condition: 100% Brand New Item Type: Radiator Cooling Fan Relay Kit Material: Plastic Application: Works for 7/8 inch Fans, 10/12/14/16/inch Fans How to wire Single Terminal Fan Thermostat Switches: 1.These switches should be used in conjunction with a relay. 2.The switch should operate the relay and the relay should provide power to the fan since an electric fan typically draws a lot of current. When the switch closes to ground (within 170-210°C) the relay is energized and powers the fan. And the switch will open and break the ground circuit when the temperature drop. 3.The relay de-energizes and cuts power to the fan. Installation Precautions: (1) Turn off the engine, and after the water in the engine radiator has cooled to room temperature, replace with a new cooling fan temperature switch. (2) Please avoid using external high temperature sources after installation. (3) When installing, avoid sprinkling water on the surrounding automobile parts. Direct Connect:(Fan will Opera when the ignition is "on") 1.Attach the positive fan motor wire (Blue)to a 12V positive ignition controlled source e.g. fuse box. Note:We recommend the use of a 20 Amp inline fuse(not included) for each fan. 2.Attach the negative fan motor wire(Black) to a suitable ground. Note:Connect directly to battery negative terminal if possible 3.Reconnect the battery Relay: Black Wire: Thermostat Blue Wire:Fan (Blue Wire On Fan) White Wire: AUX Side On Circuit Breaker Red Wire: Ignition Switch W/30A-40A BUSS FUSE Package List: 1 x Connection Cable 1 x Water Temperature Sensor 1 x Relay 1 x Overload Protector 7 x Wiring Insulation Terminal