Oil Pressure Switch
- Turn ignition on. Verify oil pressure warning light illuminates. If oil pressure warning light does not illuminate, check warning light bulb and related wiring harness. If bulb and wiring harness are okay, replace oil pressure switch.
- Start engine. Verify oil pressure warning light goes out. If oil pressure warning light remains illuminated, check oil pressure and related wiring harness. If oil pressure and wiring harness are okay, replace oil pressure switch.