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Why don't my high speed coolant fan cut on wth th relay in but will wth out it?
Wiki User
∙ 13y ago
Because if the sensor temperature part is defective it will automatically turn on the fan all the time. If you unplug the temperature sensor in the cooling system the fan will automatically come on. You need to replace the temperature sensor that goes to the Powertrain Control Module (computer).
Wiki User
∙ 13y ago
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