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The fan switch, on your 1986 Chevy, is located on the fan of. The switch will have three wires going to it, from the temperature sensor.
The coolant temperature switch and the cooling fan relay (same thing) is usually located in the water outlet housing. It will be the bigger sensor, the smaller is the temperature gauge sensor.
there's no switch, it has a temperature sensor.
fan motor could be grounding internally Unplug the fan switch and ground the wire if the fan stops replace the switch. If not you have an open between the coolant sensor (switch) and the relay. The coolant sensor for the fan is not the same sensor for the computer/fuel injection.
that would be either fan switch or temperature sensor
It's the temperature switch for the electric fan
The cooling fan comes on when the engine reaches a certain temperature and is controlled by a sensor switch that kicks the fan on when the temperature reaches the preset temp.
The coolant fan sensor is the same as the sensor that shows the coolant temperature on the dash gauge. It is located on the intake manifold.
The temperature sensor you're asking about is a device that detects a temperature above a specific point, usually somewhere around 180F, then closes the contacts of a switch. The switch can directly run a motor or it may be connected to a relay. If the contacts of the temperature sensor switch become damaged they can weld together and the switch will stay on constantly.
You don't have one. The fan is controlled by the PCM. It gets its information from the A/C pressure switch and a sensor right behind the thermostat. The temperature guage gets it's reading the same way, so if the guage is reading ok, the sensor is good.
its the electric fan thermo switch
A faulty thermal sensor, a stuck fan clutch, or the fan switch being set to manual are possibilities.