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2010 Cadillac Truck SRX AWD V6-3.0L Page 719

2010 Cadillac Truck SRX AWD V6-3.0L Page 719



B3885 02 or B3886 02



The trailer brake control module detects a short to ground on the appropriate tail lamp control circuit.



B3885 04 or B3886 04



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



Action Taken When the DTC Sets



The appropriate trailer tail 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



Ignition ON, observe the function of the left trailer tail lamp and the right trailer tail lamp while commanding the Left Trailer Tail Lamp and the



Right Trailer Tail Lamp ON and OFF with a scan tool. The left trailer tail lamp and the right trailer tail lamp should turn ON and OFF while



changing between the commanded states.



Circuit/System Testing



1. Ignition OFF, disconnect the X1 harness connector at the K68 trailer lighting control module.



2. Test for infinite resistance between the control circuit terminal listed below and ground:



* Right trailer park lamp control terminal 16



* Left trailer park lamp control terminal 4



瀚慖f less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the X88 trailer connector.



3. Test for less than 1 ohm between the control circuit terminals listed below:



* Control terminal 16 at the K68 trailer lighting control module and control terminal 5 at the X88 trailer connector.



* Control terminal 4 at the K68 trailer lighting control module and control terminal 7 at the X88 trailer connector.



瀚慖f greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal,



replace the X88 trailer connector.



4. If all the circuits test normal, replace the K68 trailer lighting control module.

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