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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting >> Diagnostic Information and Procedures >> DTC B257A >> Diagnostic Fault Information

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Headlamp Switch Off B257A 00 2 and 4 4 -
Park Lamp Switch On B257A 00 B257A 00 3 -
Headlamp Switch On B257A 00 1 1 -
Headlamp Switch Ground - 1,3, and 4 - -
  1. Headlamps Inoperative Low and High Beams
  2. Headlamps Always On Low or High Beam
  3. Park, License, and Tail Lamps Inoperative
  4. Daytime Running Lamps (DRL) Defeat Inoperative
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