Oxygen Sensor

Fig. 5 Oxygen Sensor Light Relay:

Fig. 4 Oxygen Sensor Warning Light Harness:

After the vehicle has been operated for 30,000 miles the oxygen sensor warning light located on the instrument panel will come on, indicating that the oxygen sensor should be checked.
After verifying oxygen sensor operation, reset the warning light hold relay located just above the glove box, Fig. 5. After the 90,000 mile service, disconnect warning light electrical connector to prevent the light from coming on again, Fig. 4.