2010 Cadillac Truck SRX AWD V6-3.0L Page 350
control circuit. When the front fog lamp relay is energized, the relay switch contacts close and battery voltage is applied through the front fog lamp
fuse to the front fog lamp supply voltage circuit which illuminates the front fog lamps.
Conditions for Running the DTC
* The ignition is turned ON.
* Front fog lamp switch activated.
Action Taken When the DTC Sets
Front fog lamps malfunction
Conditions for Setting the DTC
Front fog lamp switch stuck
Conditions for Clearing the DTC
The condition for setting the DTC is not longer present.
Reference Information
Schematic Reference
Fog Lights Schematics (See: Diagrams/Electrical Diagrams/Lighting and Horns/System Diagram/Fog 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
Ignition ON, observe the scan tool Front Fog Lamps Switch parameter. The reading should change between Active/Inactive when changing
between pressed and released front fog lamp switch button.
Circuit/System Testing
1. Ignition OFF, disconnect the X1 and X3 harness connector at the K9 Body Control Module.
2. Ignition ON, test for less than 0.3 V at the K9 Body Control Module signal circuit harness terminal 9 X1 and ground.
瀚慖f greater then the specified value, test the signal circuit for an short to voltage.
3. Test for less than 0.3 V at the K9 Body Control Module 12 V reference circuit harness terminal 4 X3 and ground.
瀚慖f greater than the specified value, test the 12 V reference circuit for a short to voltage.
4. Ignition OFF, test for infinite resistance between the K9 Body Control Module signal circuit harness terminal 9 X1 and ground.
瀚慖f lower than the specified value, test the signal circuit for a short to ground.
5. Test for infinite resistance between the K9 Body Control Module 12 V reference circuit harness terminal 4 X3 and ground.
瀚慖f lower than the specified value, test the 12 V reference circuit for a short to ground.
6. Press and hold the front fog lamp switch button.
