Low Oil Pressure Indicator Does Not Come on With the Ignition Switch In on (II) (J35Z3 Engine)
Low oil pressure indicator does not come on with the ignition switch in ON (II)
Do the low oil pressure indicator circuit troubleshooting (Short) procedure Low Oil Pressure Indicator Circuit Troubleshooting - Short (J35Z3 Engine).
Test the oil pressure switch Testing and Inspection.
Also check for
A wire shorted to ground between the ECM and the oil pressure switch