New Holland 4319 – EHR: Rear Remote No.7 - Under Voltage

The electronic controller is receiving a voltage signal from the 7th rear remote hydraulic valve actuator that is lower than the acceptable minimum threshold. This condition typically points to an open circuit, a short to ground in the wiring harness, or a failed internal potentiometer/position transducer within the remote valve actuator itself.

• T8.275
• T8.300
• T8.320
• T8.330
• T8.350
• T8.360
• T8.380
• T8.390
• T8.410
• T8.420
• T8.435
• T7.210
• T9.390
• T9.450
• T9.505
• T9.560
• T9.615
• T9.670
• TG245
• T7040

1. 1

   Check battery and charging system health (resting voltage should be above 12.6V, alternator output 13.5-14.5V)

2. 2

   Inspect all major ground straps, especially the main chassis ground, ensuring they are clean, tight, and free of corrosion

3. 3

   Check fuses and relays related to the EHR system using the tractor's wiring diagram

4. 4

   Visually inspect the wiring harness and connectors leading to the No. 7 remote valve for chafing, corrosion, or loose connections, paying close attention to the connector at the valve solenoid itself

5. 5

   Perform a 'Click Test' by activating the No. 7 remote from the cab and listening/feeling for the solenoid to actuate

6. 6

   Perform a voltage test with power on at the disconnected solenoid connector (should read 10.8V to 13.2V)

7. 7

   Perform a resistance test with power off across the solenoid pins (normal range is 3-6 Ohms; 'OL' indicates an open circuit, near-zero indicates a short)

1. 1

   Isolate the fault

   Based on the diagnostic checks, determine if the fault lies with the power supply, wiring, or the solenoid itself.

2. 2

   Address power and wiring issues

   If low voltage was detected in the harness connector, trace the wiring back towards the EHR controller, looking for damage or loose connections. Repair or replace any compromised sections of the harness.

3. 3

   Replace the solenoid

   If the solenoid is confirmed faulty through resistance testing, unscrew the retaining nut, slide the old coil off, install the new coil, secure it with the retaining nut, and reconnect the wiring harness.

4. 4

   Replace the remote valve assembly

   If there are internal issues or if the solenoid is not available as a separate part, replace the entire remote valve assembly.

5. 5

   Calibrate the system

   After replacing a remote valve or controller, perform a calibration procedure through the tractor's diagnostic menu. This may require a special tool or dealer assistance.