Engine Coolant Level Indicator (LO Coolant Level Warning)

The Engine Coolant Level Indicator Module receives voltage from line (39) when the Ignition Switch is in RUN or START

The resistance across the Low Coolant Level Sensor, which is placed in the radiator, increases when the coolant level goes low, causing the Engine Coolant Level Indicator Module to produce a current flow through the indicator bulb. Illumination of the Low Coolant Level Warning bulb alerts the driver to this condition.