Overhaul

Engine Block Heater (If Equipped) Inspection
Reference: Engine Block Heater (If Equipped) Removal and Installation

^ Check continuity between terminal "a" and "c". If there is no continuity, replace it.
^ Check that there is no continuity between terminal "a" or "b" and "c". If there is continuity, replace it.
^ Check continuity between terminal "c" and engine block heater body. If there is no continuity, replace it.