John Deere 1520: Header Lower Valve Driver Fault

The Header Control Unit detects an open, short, over voltage, or over temperature condition in the Header Lower Valve driver. The Header Lower Valve will not operate until the fault condition is resolved.

1. 1

   The Header Lower Valve driver

2. 2

   The wiring and connections to the Header Lower Valve driver

3. 3

   The power supply to the Header Lower Valve driver

1. 1

   Inspect

   Inspect the Header Lower Valve driver for visible damage or signs of overheating.

2. 2

   Test

   Test the wiring and connections to the Header Lower Valve driver for continuity and proper voltage.

3. 3

   Check

   Check the power supply to the Header Lower Valve driver for correct voltage and stability.