Massey Ferguson 10.02.23 – AC Module (AIRCON): Optional Cab Extra Fan Relay Signal From AC Module (AIRCON)

This code indicates a communication or electrical issue with the signal sent from the Air Conditioning (AC) Module to the relay that controls the optional extra cab fan. The module is either not detecting the relay, detecting an open/short circuit, or receiving an improper voltage return signal when attempting to activate the extra fan.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Check the Fuses: Locate the cab fuse box and inspect the fuse dedicated to the HVAC/Cab fans. A blown fuse will cut power to the relay circuit.

2. 2

   Test the Relay: Locate the Optional Cab Extra Fan Relay. Swap it with a known good relay of the same amperage (e.g., a work light relay) to see if the fault clears.

3. 3

   Inspect Wiring & Connectors: Check the wiring harness running from the AC Module to the relay block. Look for chafed wires, loose pins, or corrosion in the connectors, which are common in agricultural environments.

4. 4

   Test the Fan Motor: Disconnect the extra cab fan and supply direct 12V power to it. If the fan motor is seized or drawing excessive amperage, it may have burned out the relay or caused the module to cut the signal to protect the circuit.

1. 1

   Disconnect Power

   Turn off the tractor and disconnect the negative battery terminal to prevent electrical shorts.

2. 2

   Access the Relay Panel

   Open the cab fuse/relay access panel (location varies by model, often on the right-hand console or under the steering column).

3. 3

   Replace the Relay

   If the relay failed the diagnostic swap test, pull the faulty relay using relay puller pliers and insert the new OEM replacement.

4. 4

   Repair Wiring (If Applicable)

   If the relay was good but the signal wire was broken, splice and heat-shrink the damaged section of the harness between the AC module and the relay block.

5. 5

   Reassemble and Clear Codes

   Reconnect the battery, turn the ignition to the ON position, and use a diagnostic tool to clear the 10.02.23 inactive code. Run the AC system and manually engage the extra cab fan to verify operation.