New Holland 18046 – ACM: EHR Float Control Switch Error

The Armrest Control Module (ACM) has detected an electrical error related to the Electro-Hydraulic Remote (EHR) float control switch (also referred to as the side swing control switch). This indicates a malfunction or inconsistency in the operation of the switch or its associated circuitry, which prevents the engagement or disengagement of the float feature for the specific remote valve.

• T6 Series
• T6000
• T6.140-T6.180
• T7 Series
• T7000
• T7.170-T7.270
• T7.290 HD-T7.340 HD
• T8 Series
• T8.275-T8.435
• TSA Series

1. 1

   Visually inspect the EHR float control switch and its wiring harness for frayed wires, loose connections, or corrosion on the connectors

2. 2

   Check for loose connections at the switch connector and the main harness connections to the armrest controller (note: wires can break internally near the plug)

3. 3

   Test the continuity of the wiring between the switch and the armrest control module using a multimeter, checking for shorts to power or ground

4. 4

   Test switch functionality with a multimeter to verify continuity changes when the switch is activated and deactivated

5. 5

   Swap the switch with another identical switch on the armrest (if available) to determine if the fault lies with the switch itself or the wiring

6. 6

   Perform a lever calibration procedure through the tractor's diagnostic menu

1. 1

   Disconnect power

   Disconnect the battery before starting any repair work to prevent electrical damage.

2. 2

   Access armrest internals

   Remove the armrest top cover or side panels to access the switches and wiring. The process varies depending on the specific tractor model.

3. 3

   Locate and remove switch

   Identify the specific EHR float control switch. Carefully disconnect the wiring harness and release any clips or retaining nuts to remove the old switch.

4. 4

   Install new switch

   Place the new switch into the armrest, ensuring it is properly seated and secured, then reconnect the wiring harness.

5. 5

   Reassemble armrest

   Reinstall any covers or panels that were removed to access the armrest internals.

6. 6

   Test and clear codes

   Reconnect the battery and turn the key to the 'on' position. Clear any stored fault codes using the tractor's diagnostic menu or a service tool. Operate the float control to ensure the new switch is functioning correctly.

7. 7

   Calibrate EHR

   If required by the specific model or if other EHR functions seem incorrect, perform a calibration of the EHR levers and switches.