Oil Pressure Gauge
- Disconnect connector from oil pressure sender unit and connect to matching terminals on tester (Rotunda 21 0015). Attach tester ground wire to vehicle frame. Turn vehicle ignition switch to "ACC" position.
- Turn tester switch to "IVR CHECK" position. A flashing light indicates IVR and wiring are functional. Turn tester switch to either "HIGH" or "LOW" position. The center line of gauge pointer should be within the oil pressure White band of tester.
- If center of pointer registers in White band, system is operating properly and oil pressure sending unit must be replaced. If pointer center line falls outside low band, replace gauge. If outside high band, replace IVR and repeat test. If still outside high band, replace gauge and reinstall original IVR.