175-185 Thermostat Dual Electric Cooling Fan Wiring Relay Sensor Kit 40 Amp 12V Perfect for your muscle car, 4x4, or hot rod! Scorpion 12 volt Electric Fan Wiring Harness, Relay, Sending Unit & Circuit Breaker 12V The 40 Amp Relay Helps take the Load & Aids in Starting the Fan with less Amps Also includes an Overload Circuit Breaker ncludes the Relay Wiring Harness with 350cm of Wire. Also included is an assortment of wiring connectors to help aid in installation. Professional installation is highly recommended. Instructions Included Electric Fan Wiring Harness Kit 3/8" NPT Switch(Inside a lid that can be converted to 1/2") On at 185 Degrees, Off at 175 Degrees Inline Fuse Blade 30A 40A Waterproof 40Amp Relay Optional Switched Overide Capability Application: 2X 8/10/12/14 inch Fan Single 8/10/12/14/16 Inch FanFor reference: 12 Gauge - 20 Amps; 10 Gauge - 30 Amps; 8 Gauge - 40 AmpsThe thermostat supplied with this kit is OE style to mount in the cylinder head of the engine or any water jacket if needed. The thermostat MUST be grounded through the threads to the engine in order for it to work, and the engine MUST be groundedThe thermostat MUST be grounded through the threads to the engine in order for it to work, and the engine MUST be you want to turn on the fan when the air conditioner starts, you need an additional relay kit, follow the steps below:1.Connect the RED wire from the A/C relay to the grey wire (sending unit) of the original fan relay harness2.Connect the GREY and COFFEE wires from the A/C relay to the ground3.Connect the BLACK wire from the A/C relay to the +12 volt of the A/C compressor clutc