Case IH 520577-00 - BCM – BCM: Battery isolator assembly - short to B+

Indicates a short to battery positive (B+) in the battery isolator assembly.

• MAGNUM AFS Connect
• Magnum 400 AFS Connect

1. 1

   Inspect the wiring harness connected to the battery isolator assembly for exposed wires or chafing that could cause a short to battery positive (B+).

2. 2

   Test the battery isolator assembly circuit with a multimeter to confirm the presence of a short to B+.

1. 1

   Disconnect battery

   Disconnect the battery to ensure safety.

2. 2

   Locate short

   Locate the short to B+ in the battery isolator circuit.

3. 3

   Repair or replace

   Repair the damaged wiring harness or replace the faulty battery isolator assembly.

4. 4

   Clear codes and verify

   Clear the BCM fault codes and verify the repair.