The Engine Coolant Heater Switch controls the operation of the engine coolant heater, which is used to preheat the engine coolant and warm up the engine before starting it in cold conditions. When the switch is turned on, power is supplied to the engine coolant heater, which then heats up the engine coolant using electricity or another heat source. Attributes:• Withstand the repeated usage and ensure compatibility with the heater for proper functionality• Establish a secure electrical connection when the switch is turned on Applications:The Engine Coolant Heater Switch is used to activate the engine coolant heater and when turned on, it sends a signal to the heater to start warming up the engine coolant.