Conditions for Setting the DTC
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.