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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 B388B or B388C: Secondary Left/Right Tail and Brake Lamp >> Conditions for Setting the DTC

Conditions for Setting the DTC

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.

DTC B388B 02 

The trailer lighting control module detects a short to ground in the secondary left tail and brake lamp control circuit.

DTC B388B 04 

The trailer lighting control module detects an open in the secondary left tail and brake lamp control circuit.

DTC B388C 02 

The trailer lighting control module detects a short to ground in the secondary right tail and brake lamp control circuit.

DTC B388C 04 

The trailer lighting control module detects an open in the secondary right tail and brake lamp control circuit.

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