Oil Pressure Warning Lamp/Indicator: Description and Operation

The oil pressure indicator lamp is switched to ground by the oil pressure switch on the SOHC engine or by the oil pressure sender/switch on the DOHC engine. When the lamp is switched to ground, ignition voltage flows through the lamp, allowing it to illuminate. This indicates to the vehicle's operator that the oil pressure has dropped below a specified limit.

The oil pressure indicator lamp is illuminated, for approximately one to two seconds, until the oil pressure raises enough to open the oil pressure switch, for a bulb check.