Pinpoint Test G: Oil Pressure Warning Lamp System
NOTE:
Go to TROUBLE SHOOTING
before starting pinpoint test. Identify system where problem is located. Find symptom in trouble shooting and go to specific pinpoint test step as directed by trouble shooting procedure.
- Check Fuse
Check the 10A METER fuse located in the interior fuse panel. Is the fuse OK? If yes, go to step 4 . If no, go to next step. - Check System
Turn key OFF. Replace the 10A METER fuse. Turn key ON. Does the fuse fail again? If yes, go to next step. If no, go to step 4 . - Check For Short To Ground
Turn key OFF. Remove the 10A METER fuse. Remove the instrument cluster. Disconnect the black 12-pin instrument cluster connector. Measure the resistance of the (Gray/Blue) wire between the right terminal of the 10A METER fuse and ground. Is the resistance less than 5 ohms? If yes, service the (Gray/Blue) wire. If no, replace the 10A METER fuse. Install the instrument cluster. Go to next step. See WIRING DIAGRAMS . - Check Oil Pressure Warning Lamp Circuit
Key OFF. Disconnect the low oil pressure switch connector. Ground the (Red) wire at the low oil pressure switch connector. Key ON. Does the oil pressure warning lamp illuminate? If yes, replace the low oil pressure switch. If no, go to next step. - Check Power Supply To Instrument Cluster
Turn key OFF. Remove the instrument cluster. Disconnect the black 12-pin instrument cluster connector. Turn key ON. Measure the voltage on the (Gray/Blue) wire at Terminal No. 2I of the black 12-pin instrument cluster connector. Is the voltage greater than 10 volts? If yes, go to next step. If no, service the (Gray/Blue) wire between the interior fuse panel and the instrument cluster. See WIRING DIAGRAMS . - Check Oil Pressure Warning Lamp Bulb
Turn key OFF. Disconnect the oil pressure warning lamp bulb. Measure the resistance between the terminals of the oil pressure warning lamp bulb. Is the resistance approximately 16 ohms? If yes, go to next step. If no, replace the oil pressure warning lamp bulb. - Check Wire Between Instrument Cluster & Low Oil Pressure Switch
Turn key OFF. Disconnect the white 12-pin instrument cluster connector. Disconnect the low oil pressure switch connector located near the oil filter. Measure the resistance of the (Red) wire between Terminal No. 3E of the white 12-pin instrument cluster connector and the low oil pressure switch connector. Measure the resistance of the (Red) wire between Terminal No. 3E of the white 12-pin instrument cluster connector and ground. Is the resistance less than 5 ohms between the instrument cluster connector and the low oil pressure switch connector, and greater than 10,000 ohms between the instrument cluster connector and ground? If yes, replace the instrument cluster printed circuit board. If no, service the (Red) wire. See WIRING DIAGRAMS .