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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 345 (Trailer Brake Control System) >> Diagnostic Information and Procedures >> DTC C0870, C1112, C1113, C1114, or C1119 (Gasoline Without LY6) >> Diagnostic Aids

Diagnostic Aids

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Inspect the trailer brake output supply voltage control circuit (dark blue wire circuit 47) that runs from the trailer brake relay to the 7-pin trailer connector in the bumper for water intrusion or corrosion.

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