Chevrolet 10232602 Sensor Assembly, Engine Coolant Temperature Gage (W/ Indicator Switch)

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The indicator system includes a lamp mounted on the instrument panel and a coolant temperature sensor located on the intake manifold adjacent to the thermostat housing. If there is an unusual indication or a fault develops, it is necessary to check the coolant level in the system and ensure that the connecting wiring between the gauge and the coolant temperature sensor is secure. When the ignition switch is turned on and the starter motor is turning, the indicator lamp should be illuminated, indicating an overheated engine. If the lamp is not on, it could be due to a burned-out bulb, a faulty ignition switch, or an open circuit. Once the engine starts, the lamp should go out and remain so unless the engine overheats. If the lamp does not go out, it could be due to the wiring being grounded between the lamp and the coolant temperature sensor, a defective coolant temperature sensor, or a faulty ignition switch. If the coolant temperature sensor needs to be replaced, it can be unscrewed from the intake manifold and a replacement installed. There may be some coolant spillage, so the level should be checked after the replacement has been installed.