i am using an electric fan but had no spot to put the fan temp sensor
i most people put it in the motor or the thermostat housing, neither option was open
and i figure by doing that the fan will run anytime the motor is up to temp or the thermostat opens...
i put the sensor in the lower radiator hose.
figuring that if the water coming out of the radiator is too warm, then the fan would turn on.
i also added a ground stud to the tube because both ends are in rubber.