2010 Cadillac Truck SRX AWD V6-3.0L Page 712
Conditions for Running the DTC
Brake pedal is applied.
Conditions for Setting the DTC
B3881 01
The BCM detects a short to voltage on the left rear brake lamp control circuit.
B3881 02
The BCM detects a short to ground on the left rear brake lamp control circuit.
B3882 01
The BCM detects a short to voltage on the right rear brake lamp control circuit.
B3882 02
The BCM detects a short to ground on the right rear brake lamp control circuit.
Action Taken When the DTC Sets
The appropriate brake 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 50 ignition cycles.
Reference Information
Schematic Reference
Exterior Lights Schematics (See: Diagrams/Electrical Diagrams/Lighting and Horns/System Diagram/Exterior Lights 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
1. Ignition ON, observe the function of the E5L stop lamp-left while commanding the Left Brake Lamp ON and OFF with a scan tool. The E5L
stop lamp-left should turn ON and OFF while changing between the commanded states
2. Observe the function of the E5R stop lamp-right while commanding the Right Brake Lamp ON and OFF with a scan tool. The E5R stop
lamp-right should turn ON and OFF while changing between the commanded states.
Circuit/System Testing
1. Ignition OFF, disconnect the X1 harness connector at the appropriate E5 tail lamp.
2. Test for less than 30 ohm between the ground circuit terminal C and ground.
