2010 Cadillac Truck SRX AWD V6-3.0L Page 716
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, command the E6 center high mounted stop lamp ON and OFF by applying and releasing the brake pedal. The E6 center high mounted
stop lamp should turn ON and OFF each time the brake pedal is applied and released.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the E6 center high mounted stop lamp.
2. Test for less than 30 ohm between the ground circuit terminal B and ground.
瀚慖f greater than the specified value, test the ground circuit for an open/high resistance.
3. Connect a test lamp between the control circuit terminal A and ground.
4. Ignition ON, command the center high mounted stop lamp ON and OFF by applying and releasing the brake pedal. The test lamp should turn
ON and OFF when changing between the selected 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 ground or an open/high resistance. If the circuit tests normal, replace
the K9 BCM.
5. If all circuits test normal, replace the E6 center high mounted stop lamp.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* High Mount Stop Lamp Replacement (See: Lighting and Horns/Center Mounted Brake Lamp/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming
B3885
DTC B3885 or B3886
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B3885 02
- Trailer Left Tail Lamp Circuit Short to Ground
DTC B3885 04
- Trailer Left Tail Lamp Circuit Open
DTC B3886 02
- Trailer Right Tail Lamp Circuit Short to Ground
DTC B3886 04
- Trailer Right Tail Lamp Circuit Open
Diagnostic Fault Information
