Case IH 518109-00 - BCM – BCM: Work lamp #12 - too many loads or faulty load

The system detects too many loads or a faulty load on the Work lamp #12 circuit, indicating a current draw higher than the safe ampacity level or a short circuit.

• MAGNUM AFS Connect

1. 1

   Visually inspect the Work Lamp #12 circuit to see if any unauthorized aftermarket lights or accessories have been added, which would exceed the circuit's safe load limit.

2. 2

   Use the machine's wiring diagram to test the work lamp wiring harness for shorts to ground or open circuits.

3. 3

   Check the load switch to verify that the load status changes correctly when the switch position is toggled.

4. 4

   Inspect the specific fuses and relays associated with the work lamp control unit.

1. 1

   Disconnect Power

   Turn off the machine and disconnect the battery to prevent electrical arcing.

2. 2

   Remove Excess Loads

   If multiple appliances or lamps have been wired into the Work Lamp #12 circuit, remove them to bring the current draw back below the circuit's maximum ampacity.

3. 3

   Repair Wiring

   If harness testing revealed a short circuit or open wire, repair or replace the damaged section of the wiring harness.

4. 4

   Replace Faulty Components

   If the load switch fails the status change test, replace the load switch. If the work lamp itself has an internal short, replace the lamp assembly.

5. 5

   Clear and Retest

   Reconnect the battery, clear the fault code from the BCM, and turn on the work lamps to verify the code does not return.