Oil Pressure Switch

The Oil Pressure Switch monitors how many PSI your oil system is running and sends out a signal. A single vehicle can have more than one oil pressure sending unit. In older vehicles the Oil Pressure switch sends a signal to a gauge or light.

Oil pressure switch-the normal closed circuit keeps the oil pressure warning/check gauges lamp on until there is oil pressure.

To test the normally closed oil lamp circuit, disengage the locking connector and measure the resistance between the switch terminal (terminal for the wire to the warning lamp) and the metal housing. The ohmmeter should read 0 ohms.