The Glow Plug Relay is an electrical switch that controls the power to the glow plugs. The glow plug is a heating element that preheats the combustion chambers of a diesel engine before starting. The glow plug relay is located in the engine compartment, near the other electrical components.Attributes: • Manufactured to precise specifications and are built for durability, and reliability• Provide a consistent voltage to the glow plugApplications:The Glow Plug Relay is used to limit the current draw to prevent the electrical system from being overloaded and protect the glow plugs from damage.