New Holland 19181: Short Circuit in Reversing Valve or P20A3 Vapor Vent Valve

A short circuit has been detected in the reversing valve (4-2-way valve) electric circuit or in the P20A3 vapor vent valve (air dryer control valve) circuit, specifically to a high voltage source.

1. 1

   The reversing valve (4-2-way valve) electric circuit for signs of damage or shorting

2. 2

   The P20A3 vapor vent valve (air dryer control valve) electric circuit for signs of damage or shorting

1. 1

   Inspect

   Inspect the wiring and connections of the reversing valve (4-2-way valve) electric circuit for damage, wear, or shorting.

2. 2

   Inspect

   Inspect the wiring and connections of the P20A3 vapor vent valve (air dryer control valve) electric circuit for damage, wear, or shorting.

3. 3

   Test

   Test the continuity and insulation resistance of the affected circuits using a multimeter, following the service manual procedures.