Case IH 2388-05 - BCM – BCM: Work lamp #8 - open circuit

This fault code indicates that the control module has detected an "open circuit" on the electrical circuit supplying power to Work Lamp #8. An open circuit means that electrical current cannot flow, which is typically caused by a blown bulb/LED, a disconnected plug, a broken wire in the harness, or a failed ground connection.

• MAGNUM AFS Connect
• Case IH Magnum AFS Connect
• Steiger AFS Connect

1. 1

   Consult the operator's manual to identify the exact physical location of Work Lamp #8 (e.g., front cab roof, rear fender).

2. 2

   Inspect the bulb or LED assembly for obvious signs of failure, burnout, or physical damage.

3. 3

   Unplug the connector at Work Lamp #8 and check for loose pins, pushed-back terminals, moisture, or corrosion inside the plug.

4. 4

   Using a multimeter, test the connector at the lamp. With the tractor key ON and the work light switch activated, check for 12V power on the supply wire and ensure there is a solid path to ground on the ground wire.

5. 5

   If there is no power at the lamp connector, trace the wiring harness back toward the BCM (checking intermediate cab/roof harness connectors) for broken or chafed wires.

1. 1

   Turn off the tractor and disconnect the battery ground cable to prevent short circuits during repair.

2. 2

   If the lamp is faulty: Remove the mounting hardware for Work Lamp #8, disconnect the pigtail, and install a new LED or halogen work lamp assembly.

3. 3

   If the connector is corroded: Clean the pins with electrical contact cleaner. If the connector is melted or heavily corroded, splice in a new replacement connector pigtail using weatherproof heat-shrink butt connectors. Apply dielectric grease to the pins before reconnecting.

4. 4

   If the wiring is broken: Locate the break in the harness. Strip back the damaged wire, splice in a new section of wire if necessary, and seal the repair with marine-grade heat shrink tubing.

5. 5

   Reconnect the battery and turn on the work lights to verify that Work Lamp #8 illuminates.

6. 6

   Clear the fault code using a diagnostic tool, or cycle the ignition key.

   The BCM will often move the code to an inactive state once it detects the proper circuit resistance.