Friday, February 7, 2020

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 292

2010 Cadillac Truck SRX AWD V6-2.8L Turbo 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

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