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Bulb Circuit

  1. Connect Lexus Hand-Held Tester (scan tool) to DLC3 connector. Turn ignition on. Turn on scan tool and select ACTIVE TEST. Ensure all lights operate as commanded by scan tool. If all lights operate, go to next test listed in INDICATOR TEST INDEX  table. If any lights do not operate, go to next step.
  2. Check continuity of bulb. Replace as necessary. Check instrument cluster circuit plate. See CIRCUIT PLATE  under PIN VOLTAGE TESTS. Replace as necessary. Check instrument cluster. See INSTRUMENT CLUSTER CIRCUIT  under PIN VOLTAGE TESTS. Repair or replace as necessary.
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