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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, 4WD >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Engine & Automatic Transmission Cooling System >> Engine >> Heater-Engine Block >> Operation >> Operation

Heater-Engine Block: Operation: Operation

Connecting the power cord to a grounded 110-120 volt AC electrical outlet with a grounded, three wire extension cord activates the heating element warming the engine coolant.