Operation CHARM
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Dodge or Ram Truck
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1991
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D 250 Pickup L6-359 5.9L DSL
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Cooling System
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Engine - Coolant Temperature Sensor/Switch
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Coolant Temperature Sensor/Switch (For Computer)
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Testing and Inspection
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
When diagnosing problems check for loose or corroded connections and for broken wires.
Replace the sensor and rerun engine to confirm the temperature.