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Home >> Cadillac >> 2009 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B3884 >> Circuit/System Testing
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Circuit/System Testing

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  1. Disconnect the CHMSL and test for internal shorts between all terminals of the CHMSL assembly.
    • If a short between terminals is found, replace the CHMSL.
  2. Test the CHMSL supply voltage circuit for a short to ground.
    • If all circuits/connections test normal, replace the BCM.
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