JCB P0685: Main Relay System Fault (Open)

The system has detected an open circuit in the main relay system. This fault indicates that the main relay is not functioning properly, which may prevent the machine from starting or operating correctly.

1. 1

   The main relay

2. 2

   The wiring connected to the main relay

3. 3

   The power supply to the main relay

1. 1

   Inspect

   Inspect the main relay for visible damage or signs of failure.

2. 2

   Test

   Test the main relay for proper operation using a multimeter or diagnostic tool.

3. 3

   Check

   Check the wiring and connections to the main relay for continuity and proper seating.

4. 4

   Verify

   Verify the power supply to the main relay is stable and within specifications.