Fan control kit 12v 40a This electric cooling fan relay kit provides fully automatic temperature control and ensures that the engine always operates within an optimal temperature rangecrucial during hard driving, track use, and racing. The included temperature sensor with 3/8" NPT thread is precisely calibrated to switch the fan ON at approx. 85°C (185°F) and OFF again at 80°C (175°F). The result is efficient, demand-controlled cooling when the engine is under the highest load. Complete and professional wiring harness The kit is supplied complete with a waterproof 12V 40A relay (JD1912) and a pre-assembled wiring harness with a generous cable length of approx. 90 cm, providing great flexibility during installation. A 20A blade fuse protects the electrical system, and all necessary terminals and connectors are included for a safe and professional installation. Quick and easy installation A clear wiring diagram is included, showing connections for battery, fan, ignition, temperature s