An Ignition Stating Aid Switch Key is turned, and it activates an electrical heating element, called a glow plug or a pre-heater, that warms the air inside the cylinders. This helps vaporize the diesel fuel, making it easier to ignite and start the engine in cold weather conditions when the engine oil and other fluids are more viscous.Attributes:• Manufactured to precise specifications and are built for durability and reliability• Provide a boost of power to the engine during cold startsApplications:An Ignition Stating Aid Switch Key provides supplemental heat to the engine's cylinders during the engine cranking and starting process, which is for reliable cold-weather operation. By assisting with cold starts, the starting aid switch can improve fuel combustion efficiency.