John Deere 000876.00 – ATC / ETC: M02 Compressor Clutch, Current Overload Protection Active at Power Module (HF) PC6

The Power Module (HF) PC6 has detected an overcurrent condition (excessive amperage draw) on the circuit supplying the M02 Air Conditioning Compressor Clutch. To prevent electrical damage or a potential fire hazard, the module's overload protection actively shuts down the power supply to the compressor clutch, resulting in a loss of A/C cooling.

• 6230
• 6330
• 6430
• 7130
• 7230
• 7330
• 7430
• 7530
• 5M Series
• 5R Series
• 6M Series
• 6R Series

1. 1

   Inspect the wiring harness leading to the M02 compressor clutch (specifically lead 0732 / 2023) for chafed wires rubbing against the engine block or frame that could cause a direct short to ground.

2. 2

   Disconnect the A/C compressor clutch connector and measure the resistance (Ohms) across the clutch coil terminals. Extremely low resistance (approaching 0 Ohms) indicates an internally shorted coil.

3. 3

   Verify the output voltage from the Power Module PC6, as a failure within the module itself can sometimes falsely trigger overload protections if the wiring and clutch coil are intact.

1. 1

   Disconnect power

   Turn off the tractor and disconnect the negative battery cable to ensure safety while working on the electrical system.

2. 2

   Repair wiring harness

   If a short to ground was found in the harness, splice and solder the damaged wire. Protect it with heat-shrink tubing and corrugated wire loom, and route it away from hot or moving engine components.

3. 3

   Replace compressor clutch

   If the coil is shorted, remove the serpentine belt and disconnect the clutch electrical connector. Remove the center bolt holding the clutch hub to the compressor shaft. Use a puller to remove the clutch hub, pulley, and electromagnetic coil. Install the new coil, pulley, and hub, ensuring the air gap is set to the manufacturer's specification using provided shims.

4. 4

   Reassemble and test

   Reinstall the serpentine belt, reconnect the battery, and clear the ATC/ETC fault codes using a diagnostic tool or the onboard diagnostic menu. Turn on the A/C to verify the clutch engages without triggering the 000876.00 code.