2010 Cadillac Truck SRX FWD V6-3.0L Page 724

2010 Cadillac Truck SRX FWD V6-3.0L Page 724

- Trailer Right Turn Signal Circuit Open

Diagnostic Fault Information

Circuit/System Description

The trailer brake control module will receive a serial data message from the BCM indicating that the vehicle left turn signal lamp or the right turn

signal lamp has been activated. The trailer brake control module will then apply a pulsating voltage to the appropriate trailer turn signal lamps

through their respective voltage supply circuits.

Conditions for Running the DTC

When the trailer left turn lamp or right turn lamp is being actively commanded by the trailer brake control module.

Conditions for Setting the DTC

B3887 02 or B3888 02

The trailer brake control module detects a short to ground on the appropriate turn signal control circuit.

B3887 04 or B3888 04

The trailer brake control module detects an open/ high resistance in the appropriate turn signal control circuit.

Action Taken When the DTC Sets

The appropriate trailer turn signal lamp will be inoperative.

Conditions for Clearing the DTC

* The DTC will be current for as long as the fault is present.

* When the fault is no longer present, the DTC will be a history DTC.

* A history DTC will clear after 40 ignition cycles.

Reference Information

Schematic Reference

Trailer Connector/Provision Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System

Diagram/Trailer Connector/Provision Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Exterior Lighting Systems Description and Operation (See: Lighting and Horns/Description and Operation/Exterior Lighting Systems)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification