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Electrical water temperature gauges indicate engine coolant temperature in degrees Celsius (°C). A matching ETB temperature sensor is required to provide the gauge with the correct input resistance. The gauges are supplied with a 'U'-shaped fixing bracket and thumb nuts along with a 12v /2w illumination bulb. Night illumination is classic white.
The gauge size of 52mm denotes the outer diameter of the main body of the instrument and hence a 53mm to 54mm diameter hole is required in the dashboard.
52mm Wiring Diagram - Download PDF file here.