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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B257A >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
DTC B257A

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Headlamp Switch Off B257A 00 2, 4 4* -
Park Lamp Switch On B257A 00 B2057A 00 B257A 00* -
Headlamp Switch On B257A 00 1 1* -
Headlamp Ground - 1, 3, 4 - -
  1. Headlamps Always On - Low or High Beam
  2. Headlamps Inoperative - Low Beam
  3. Park/Tail Lamps Inoperative
  4. Daytime Running Lamps (DRL) Defeat Inoperative
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