I want to wire up my old truck to turn an electric fan ON to keep the radiator cool.
The ECM has an engine coolant temperature sensor mounted in the engine that alters the resistance to determine coolant temperature.
From the service manual, I have this data:
If you can not see the pic above:
__Condition________________|_Engine coolant temperature decided Just as ignition switch is | 20°C (68°F) turned ON or Start_________|___________________________________ More than 6 minutes after | 80°C (176°F) ignition ON or Start_______|___________________________________ | 20 - 80°C (68 - 176°F) Except as shown above______| (Depends on the time)_____________
So, what would be the magic temperature to look for to turn on my fan?
If I set it to 80°C (176°F), the electric fan would always be ON after 6 minutes.
If the truck has a 180°F Thermostat, should I be looking for 185°F before turning on the electric fan?