2010 Cadillac Truck SRX FWD V6-3.0L Page 292

2010 Cadillac Truck SRX FWD V6-3.0L Page 292

The cargo lamps are inoperative.

Conditions for Clearing the DTC

A current DTC clears when the diagnostic runs and passes.

Reference Information

Schematic Reference

Interior Lights Schematics (See: Diagrams/Electrical Diagrams/Lighting and Horns/System Diagram/Interior Lights Schematics)

Connector End View Reference

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

Description and Operation

Interior Lighting Systems Description and Operation (See: Lighting and Horns/Description and Operation/Interior 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

Command the Cargo Lamp ON and OFF with a scan tool. The cargo lamps should turn ON and OFF when changing between the commanded

states.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate cargo lamp.

2. Test for less than 5 ohm between the ground circuit terminal 2 and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

3. Connect a test lamp between the control circuit terminal 1 and ground.

4. Command the Cargo Lamp ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded

states.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.

瀚慖f the test lamp is always OFF, test the control circuit for a short to round or open/high resistance. If the circuit tests normal, replace the

K9 BCM.

5. If all circuits test normal, replace the cargo lamp.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Rear Compartment Courtesy Lamp Replacement - Liftgate (See: Lighting and Horns/Courtesy Lamp/Service and Repair/Rear Compartment

Courtesy Lamp Replacement - Liftgate)

* Rear Compartment Courtesy Lamp Replacement - Quarter Upper Trim (See: Lighting and Horns/Courtesy Lamp/Service and Repair/Rear

Compartment Courtesy Lamp Replacement - Quarter Upper Trim)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, programming and setup

B257A

DTC B257A

Diagnostic Instructions