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Home >> Pontiac >> 2009 >> Torrent Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 74 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B3884 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Pontiac Torrent and 2008 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  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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