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Home >> Lexus >> 2001 >> IS 300 >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Systems >> System Tests >> Test No. 4 : Illumination Circuit
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Test No. 4 : Illumination Circuit

  1. Check DOME fuse in driver-side junction block. If fuse is okay, go to next step.
  2. Check continuity of bulb in question. Replace bulb as necessary and retest system operation. If light is okay, go to next step.
  3. Check circuits for faults between interior lights, body control ECU and battery. See WIRING DIAGRAMS . Repair or replace as necessary. If circuits are okay, see SYMPTOM INDEX (OTHERS)  table. and perform appropriate test.
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