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Home >> Ford >> 1995 >> Explorer 4WD V6-245 4.0L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Pinpoint Tests >> ML - Self-Test Output/Malfunction Indicator Lamp >> ML4 - Check For B+ at MIL Bulb/Socket
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ML4 - Check For B+ at MIL Bulb/Socket

- Key "ON", engine "OFF".

- Measure voltage from battery negative post to B+ side of Malfunction Indicator Light (MIL) bulb/socket.

- Is voltage greater than 10.5 volts?

Yes -- Go to ML5. ML5 - Check MIL Bulb Response to Grounding

No -- Service open between MIL fuse and MIL bulb. Verify service by turning ignition key to "Run" position.

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