B1629

B1629-CARGO LAMP CONTROL CIRCUIT OPEN





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on, Cargo Lamp activated.

- Set Condition:
The Cluster detects the Cargo Lamp Driver circuit is open.





1. CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CENTER HIGH MOUNTED STOP/CARGO LAMP




1. Disconnect the Center High Mounted Stop/Cargo Lamp harness connector.
2. Turn the Cargo Lamp on.
3. Using a test light, measure the voltage across the (L14) Cargo Lamp Driver circuit and (Z905) Ground circuits at the Center High Mounted Stop/Cargo Lamp harness connector.

Does the test light illuminate?

Yes

- Replace the Cargo Lamp. Cargo Lamp - Removal
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. (Z905) GROUND CIRCUIT OPEN




1. Turn the ignition off.
2. Using a test light connected to 12 volts, measure the resistance to ground of the (Z905) Ground circuit at the Center High Mounted Stop/Cargo Lamp harness connector.

Does the test light illuminate?

Yes

- Go To 4

No

- Repair the open in the (Z905) Ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. (L14) CARGO LAMP DRIVER CIRCUIT OPEN




1. Disconnect the Cluster C1 harness connector.
2. Measure the resistance of the (L14) Cargo Lamp Driver circuit.

Is the resistance below 5.0 Ohms?

Yes

- Replace the Cluster. Instrument Cluster - Removal
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the open in the (L14) Cargo Lamp Driver circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.