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Home >> Infiniti >> 2004 >> M45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> Electrical Load Signal >> Diagnostic Procedure >> 8. Check Headlamp Input Signal Circuit

8. Check Headlamp Input Signal Circuit

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  1. Stop engine.
  2. Disconnect headlamp battery saver control unit harness connector.
  3. Disconnect BCM harness connector.
  4. Disconnect combination meter harness connector.
  5. Check harness continuity between the following;

    headlamp battery saver control unit terminals 2, 8 and combination meter terminal 26,

    BCM terminal 5 and combination meter terminal 26.

    Refer to WIRING DIAGRAM .

    Continuity should exist. 

  6. Also check harness for short to ground and short to power.

OK or NG 

  1. OK: GO TO 10. CHECK COMBINATION METER .
  2. NG: GO TO 9.