Diagnostic Test
- CHECK FOR AN ACTIVE DTC
- Turn the ignition on.
- Turn the Cargo Lamp on.
- With the scan tool, read the Body Control Module (BCM) DTCs and record on the repair order.
Is the DTC active?
Yes
- Go To 2
No
- 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. If no problems are found, test complete.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- CHECK THE (M25) COURTESY LAMPS DRIVER CIRCUIT FOR A SHORT TO VOLTAGE
- Turn the ignition off.
- Disconnect the Cargo Lamp harness connector.
- Disconnect the BCM C6/F harness connector.
- Turn the ignition on.
- Measure the voltage of the (M25) Courtesy Lamps Driver circuit at the Cargo Lamp harness connector.
Is an voltage present?
Yes
- Repair the short to voltage in the (M25) Courtesy Lamps Driver circuit.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go To 3
- CHECK THE (M25) COURTESY LAMPS DRIVER CIRCUIT FOR AN OPEN
- Turn the ignition off.
- Measure the resistance of the (M25) Courtesy Lamps Driver circuit between the Cargo Lamp harness connector and the BCM C6/F harness connector.
Is the resistance above 3.0 Ohms?
Yes
- Repair the open in the (M25) Courtesy Lamps Driver circuit.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go To 4
- CHECK THE (Z922) GROUND CIRCUIT FOR AN OPEN
- Turn the ignition off.
- Measure the resistance between ground and the (Z922) Ground circuit at the Cargo Lamp harness connector.
Is the resistance below 3.0 Ohms?
Yes
- Repair the (Z922) Ground circuit for an open or high resistance.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Replace the Cargo Lamp in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .