New Holland 19739 – DCU: Main Relay Opens Too Early or Too Late

The main relay is not operating at the correct time, either opening too early or shutting off too late. This can affect the power supply to the engine control module and may lead to operational issues.

1. 1

   Main Relay

2. 2

   Power Relay Control Circuit

1. 1

   Inspect

   Check the main relay for physical damage or signs of overheating.

2. 2

   Test

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

3. 3

   Inspect

   Check the wiring and connections related to the main relay and power relay control circuit.