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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 271 (Lighting System - DTC B0655 To DTC B3890) >> Diagnostic Information and Procedures >> DTC B388E: Trailer Lamps Number of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, exterior lamps ON, trailer disconnected, verify that no additional trailer lighting control module DTC's are present.
    • 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.

    • If DTC B388E 1B does not set 
  3. All OK.
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