New Holland P0685: ECM/PCM Power Relay Fault

The fault code indicates an issue with the ECM/PCM Power Relay. This component is responsible for providing power to the engine control module. A failure in this relay can lead to improper operation or communication with the engine control system.

1. 1

   ECM/PCM Power Relay

2. 2

   related wiring and connections

3. 3

   power supply to the relay

1. 1

   Inspect

   Inspect the ECM/PCM Power Relay for visible damage or wear.

2. 2

   Test

   Test the ECM/PCM Power Relay for proper function using a multimeter or diagnostic tool.

3. 3

   Replace

   If the relay is faulty, replace it with a compatible replacement.