....Temp sensors WITHOUT Relais not sure as the Fans suck 10..15 Amps..EACH....just for reliability I would go via Relais..see sticky
and use the LOWER Temp Sensor Switch(thermostat in previous note). That is the HOT part of the radiator. Unless you want to have a 2 stage switch on. Then the question is at what Temp is the upper one set? Both need to match the Real Thermostat installed on the engine. Not sure if you can get a Temp senor switch with an increment of say 10 degree. Take a look a George P's sticky, he explaines the match..I did follow that.
Matthias
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