John Deere 523814.05 – Rear Chassis (RPT) or BCU (Basic Control Unit): Rear PTO Speed 2 Solenoid Low Amp Draw

The control module commands the Rear PTO Speed 2 solenoid (Y74) to turn ON, but it detects an abnormally low current draw or no current at all. This typically indicates an open circuit, a disconnected wiring harness, or a failed/burnt-out solenoid coil.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6110M
• 6120M
• 6130M
• 6140M
• 6230
• 6330
• 6430

1. 1

   Inspect wiring harness and connectors associated with the Y74 solenoid (lead 7106 on BCU models) for disconnected plugs, worn insulation, broken wires, or corrosion.

2. 2

   Test for open circuit/continuity between the control module (RPT or BCU/PC5) and the solenoid plug using a multimeter.

3. 3

   Measure the resistance of the Y74 PTO Speed 2 solenoid coil to check for an internal open circuit (infinite resistance).

4. 4

   Check the RPT or Power Module PC5 output voltage when PTO Speed 2 is commanded on.

1. 1

   Prepare machine

   Safely park the machine on level ground, turn off the engine, and remove the key.

2. 2

   Locate solenoid

   Locate the Rear PTO Speed 2 solenoid (Y74) on the rear chassis PTO valve block.

3. 3

   Disconnect and clean connector

   Disconnect the electrical connector to the solenoid. Clean the contacts with electrical contact cleaner if dirt or corrosion is present.

4. 4

   Repair wiring harness

   If the wiring harness is damaged (causing the open circuit), splice and repair the affected section of the harness using OEM-approved weather-sealed connectors.

5. 5

   Remove retaining nut

   If the solenoid coil itself failed the multimeter test, remove the retaining nut/fastener at the end of the solenoid stem.

6. 6

   Remove old coil

   Slide the old solenoid coil off the valve cartridge.

7. 7

   Install new coil

   Slide the new PTO solenoid (Y74) onto the stem and torque the retaining nut to OEM specifications.

8. 8

   Reconnect harness

   Reconnect the electrical harness to the new solenoid.

9. 9

   Clear fault codes

   Clear the fault codes from the RPT or BCU module using a diagnostic scan tool or the tractor's CommandCenter display.

10. 10

    Verify repair

    Start the tractor and engage PTO Speed 2 to verify the repair and ensure the code does not return.