New Holland 18047 – ACM: EHR 4 Lever Position - Voltage Too Low

The armrest control module has detected an abnormally low voltage signal from the position sensor (potentiometer) of the fourth Electronic Hydraulic Remote (EHR) lever. This indicates a potential short circuit to ground, a wiring issue, or a failure within the sensor itself, which may affect the proper operation of the component associated with this lever position.

• T6
• T7
• T8
• T9
• T7.235
• T8.275
• T8.360

1. 1

   Inspect the wiring harness connecting the EHR 4 lever to the main armrest controller, paying close attention to where the harness enters the armrest. Gently pull on individual wires to check for 'stretchy' sections indicating internal breaks.

2. 2

   Check the EHR lever for dirt, dust, or debris that might be obstructing its physical movement.

3. 3

   Attempt an EHR lever calibration, which may resolve the issue if caused by a software update or temporary loss of communication: Ensure the tractor is in a safe state (e.g., park brake applied), access the calibration menu through the display (often in the 'H' menu), and follow on-screen prompts to move the lever to its full extent (raise and lower).

4. 4

   Perform a symptom analysis during an 'aux fault' warning by wiggling each lever one by one; the lever that clears the fault when moved is the problematic one.

1. 1

   Power Down

   Turn the tractor's ignition off and disconnect the battery to ensure safety during the electrical work.

2. 2

   Access the Armrest Internals

   Disassemble the armrest console to gain access to the EHR lever assemblies and their wiring. This will typically involve removing screws and panels.

3. 3

   Identify and Disconnect EHR 4

   Locate the fourth EHR lever assembly. Disconnect the electrical connector from the faulty lever.

4. 4

   Remove the Old Lever

   Unbolt or unclip the lever assembly from its mounting point within the armrest.

5. 5

   Install the New Lever

   Mount the new EHR lever assembly, ensuring it is securely in place.

6. 6

   Reconnect Electrics

   Connect the wiring harness to the new lever assembly.

7. 7

   Reassemble and Test

   Reassemble the armrest console. Reconnect the battery and turn the ignition on.

8. 8

   Calibrate

   Perform the EHR lever calibration procedure as described in the diagnostic section to ensure the new component is recognized and operates correctly.