Diagnostic Test

CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. Turn the Park Lamps on.
3. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE CENTER CONSOLE LAMPS FOR AN INTERNAL SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Center Console Lamps harness connectors.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 3
  No
  - Replace the Center Console Lamps in accordance with the service information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE UPPER SWITCH BANK FOR AN INTERNAL SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Upper Switch Bank harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 4
  No
  - Replace the Upper Switch Bank in accordance with the service information. Refer to POD, SWITCH, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE STEERING WHEEL SWITCHES FOR AN INTERNAL SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Steering Wheel Switches harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 5
  No
  - Replace the Steering Wheel Switches in accordance with the service information. Refer to REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE CLOCKSPRING FOR AN INTERNAL SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Clockspring C1 harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 6
  No
  - Replace the Clockspring in accordance with the service information. Refer to REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE PANEL LAMPS DIMMER SIGNAL CIRCUIT FOR A SHORT TO GROUND AT THE BCM C1 HARNESS CONNECTOR
NOTE:
Perform this step with all components mentioned above disconnected.
1. Turn the ignition off.
2. Disconnect the BCM C1 harness connector.
3. Measure the resistance between ground and the Panel Lamps Dimmer Signal circuit at the BCM C1 harness connector.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the short to ground in the Panel Lamps Dimmer Signal circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 7
CHECK THE PANEL LAMPS DIMMER SIGNAL CIRCUIT FOR A SHORT TO GROUND AT THE BCM C3 HARNESS CONNECTOR
NOTE:
Perform this step with all components mentioned above disconnected.
1. Turn the ignition off.
2. Disconnect the BCM C3 harness connector.
3. Measure the resistance between ground and the Panel Lamps Dimmer Signal circuit at the BCM C3 harness connector.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the short to ground in the Panel Lamps Dimmer Signal circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the BCM in accordance with the service information. Refer to REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .