Elantra GLS Wagon L4-2.0L (2000)
Oil Pressure Warning Lamp/Indicator: Description and Operation
Battery voltage is applied to the indicator bulb from fuse 10 with the ignition in ON or START. The ground of the check engine indicator is controlled
by the engine control module. The control module will light the indicator when the engine is not running or when detects a problem. When the oil
pressure is low, the oil pressure switch closes, providing a ground for the oil pressure indicator bulb.
