ML5 - Check MIL Bulb Response to Grounding

- Key "OFF".

- Attach one end of jumper wire to battery negative post or chassis ground.

- Attach other end of jumper wire to ground side of the Malfunction Indicator Light (MIL) bulb/socket.

- Turn ignition key to "RUN" position.

- Is the MIL on?

Yes -- Turn ignition key to the "OFF" position. Remove wire. Go to ML6. ML6 - Check MIL Circuit Continuity

No -- Turn ignition key to "OFF" position. Remove jumper wire. Replace MIL bulb/socket. Verify service by turning ignition key to "Run" position.