Orlando

DTC B256A

When the body control module (BCM) receives a liftgate open signal, the BCM supplies B+ to the cargo lamp control circuit. This will illuminate the cargo lamp.

B256A 01

The BCM detects a short to voltage on the cargo lamp control circuit.

B256A 02

The BCM detects a short to ground on the cargo lamp control circuit.

B256A 04

The BCM detects an open/high resistance in the cargo lamp control circuit.

B256A 01

The cargo lamp is always On.

B256A 02 or B256A 04

The cargo lamps are inoperative.

A current DTC clears when the diagnostic runs and passes.

Schematic Reference

Interior Lights Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Interior Lighting Systems Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Command the Cargo Lamp ON and OFF with a scan tool. The cargo lamp should turn ON and OFF when changing between the commanded states.

1. Ignition OFF, disconnect the harness connector at the E8S Rear Compartment Courtesy Lamp.
2. Test for less than 5 Ω between the ground circuit terminal 2 and ground.

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Connect a test lamp between the control circuit terminal 1 and ground.
4. Command the Cargo Lamp ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.

⇒	If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.

⇒	If 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 Body Control Module.

5. If all circuits test normal, replace the E8S Rear Compartment Courtesy Lamp.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.