Compass 2WD L4-2.0L (2009)
Engine Block Heater: Testing and Inspection
ENGINE BLOCK HEATER TESTING
If unit does not operate, trouble can be in either the power cord or the heater element. Test power cord for continuity with a 110-volt voltmeter or
110-volt test light; test heater element continuity with an ohmmeter or 12-volt test light.