Dual Electric Fan Relay Kit Radiator Electric Fan Thermostat Kit Item Type: Electric Cooling Fan Wire Harness Kit Specifications Voltage: 12.0 volts Material: Plastic copper aluminum Temperature: Approximately 185'F On - 175'F Off Thread Size: the temperature sensor has a 3/8'' pipe thread, and a 1/2'' adapter included This kit is set up to turn your electric fan on at 185 degrees and shut off at 175 degrees and will work with any 12 volt system. It is a 3/8" pipe thread, this kit includes everything you'll need to hook up to your fan If you want to turn on the fans when A/C activates, buy an additional relay kit and line it follow the steps below: Connect the RED wire from the A/C relay to the grey wire (sending unit) of your original fan relay harness Connect the GREY and COFFEE wires from the A/C relay to the ground Connect the BLACK wire from the A/C relay to the +12 volt of the A/C compressor clutch wire. Package Includes: 1x Wiring Diagram1x 3/8" to 1/2" Adapter2x Inline Fuse Holder2x 20 Amp Fuse8 x Ring Terminals4 x Wire Connectors1x 3/8" Thermostat Switch2x 40A Relay with Wiring Harness