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Home >> Chevrolet >> 2007 >> Impala SS >> Repair and Diagnosis >> External Pages >> Different car >> Section 579 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B2585 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clear the DTC, ignition OFF, park lamp switch OFF, disconnect the (left) park lamp relay.
  2. Verify a test lamp illuminates between the negative battery terminal and the park lamp relay control circuit.
    • If the test lamp does not illuminate replace the park lamp relay.
  3. Test for a short to voltage in the park lamp relay control circuit.
    • If all circuits/connections test normal, replace the BCM.
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