New Holland 5005 – Rear PTO: PTO Switch Circuit Open or Shorted

This fault code indicates an electrical fault within the Power Take-Off (PTO) control system. Depending on the tractor model and configuration, it typically signifies a short or open circuit in the remote fender PTO switch, an open circuit in the rear PTO brake switch, or a general electrical fault such as a blown fuse related to the PTO speed change switch. This issue affects the proper operation of the PTO system and can lead to a failure in its function.

• T6020
• T5.115
• T7 Series
• T8 Series

1. 1

   Determine if the tractor is equipped with a remote fender PTO switch to focus the diagnosis on the correct circuit

2. 2

   Inspect all fuses related to the PTO circuit, as a blown fuse is a common trigger (especially on models like the T6020)

3. 3

   Visually inspect wiring harnesses and connectors leading to all PTO-related switches (remote fender, in-cab engagement, and speed selector) for damage, chafing against the chassis, corrosion, or loose connections

4. 4

   Test the remote fender switch (if equipped) with a multimeter for continuity and ensure it changes state when pressed

5. 5

   Test the PTO brake switch and speed change switch for correct continuity across terminals when actuated

6. 6

   Test general PTO switches for continuity with a multimeter set to ohms or continuity (beep) setting, checking between appropriate pins in both 'on' and 'off' positions to ensure the circuit opens and closes correctly

1. 1

   Disconnect Battery

   Before beginning any electrical repair, disconnect the battery to prevent short circuits.

2. 2

   Isolate the Faulty Component

   Based on the diagnostic checks, identify the specific switch or section of wiring that is causing the fault.

3. 3

   Replace the Faulty Switch

   If a switch is identified as faulty, it must be replaced. Access to these switches may require removing dash panels, fenders, or other trim pieces. For example, replacing an in-cab PTO switch often involves prying out plastic tabs to release it from its mounting, unplugging the electrical connector, plugging in the new switch, and seating it back in the panel.

4. 4

   Repair Wiring

   If the wiring is found to be damaged, repair the affected section using appropriate connectors and heat shrink for a durable, weather-resistant repair.

5. 5

   Replace Fuse and Re-test

   If a fuse was blown, replace it with a new fuse of the correct amperage after the underlying short circuit has been repaired.

6. 6

   Clear Fault Codes

   After completing the repair, reconnect the battery and use the tractor's diagnostic interface to clear the 5005 fault code.

7. 7

   Verify Operation

   Start the tractor and test the full functionality of the PTO system, including engagement and disengagement from all relevant switches, to ensure the repair was successful.