Case IH 3598-03 - BCM – BCM: Radio Switched Power Short to B+

The switched power circuit supplying the radio is receiving a higher voltage than expected (Voltage Above Normal / Shorted High). This is typically caused by the wiring harness shorting to a power source (Battery Positive / B+).

• MAGNUM AFS Connect

1. 1

   Inspect the component connectors (radio and BCM connectors) for corrosion, moisture, or backed-out pins.

2. 2

   Disconnect the component (radio) and test the wiring harness.

3. 3

   Check the harness specifically for a short to a power source (B+), which is the primary cause of an FMI 03 code.

4. 4

   Verify that the power supply coming from the control module is within the correct voltage specifications.