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Home >> Cadillac >> 2018 >> XT5 Platinum >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting System - Diagnostic Information And Procedures (DTC B093F - B3949) >> Diagnostic Information and Procedures >> DTC B388E >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON, Exterior lights ON, trailer disconnected, verify that no additional trailer lighting control module DTC's are present.
    • Go to next step: If additional trailer lighting control module DTC's are not present 
  2. Verify that DTC B388E 1B is not set.
    • If DTC B388E 1B is set 

      Test or replace the K68 Trailer Lighting Control Module.

    • Go to next step: If DTC B388E 1B does not set 
  3. All OK.
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