Ranger 4WD V6-245 4.0L VIN X SFI (1999)
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Coolant Temperature Sensor/Switch (For Computer): Description and Operation
The engine coolant temperature sensor:
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sends the powertrain control module a signal indicating engine temperature.
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provides a gauge signal for coolant temperature.
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resistance decreases as coolant temperature increases.
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is mounted on top of the intake manifold.