John Deere 002392.03 – CLC: Reverse Alarm Voltage Is High Cab Module (CLC)

The Cab Load Center (CLC) has detected a voltage in the reverse alarm circuit that is higher than the normal operating range. This indicates the circuit is receiving excessive voltage, which could be caused by a short to a power source in the wiring harness or an internal failure of the reverse alarm unit itself, affecting the proper operation of the reverse alarm function.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R

1. 1

   Record and clear the fault code using the diagnostic display, then shift into reverse to see if the code becomes active again.

2. 2

   Check CommandCenter Transmission Advanced Settings to ensure the backup alarm is configured correctly and toggle the setting.

3. 3

   Visually inspect the reverse alarm on the rear cross member for physical damage, corrosion on connectors, or water intrusion.

4. 4

   Trace and inspect the wiring harness from the reverse alarm back to the CLC for pinched, chafed, or damaged areas that could cause a short to power.

5. 5

   Check all electrical connectors for the reverse alarm circuit to ensure they are securely fastened and have a good ground connection.

1. 1

   Disconnect Power

   Park the tractor on a level surface, shut it down, and disconnect the battery to prevent electrical shorts during repair.

2. 2

   Isolate the Circuit

   Disconnect the electrical connector at the reverse alarm unit.

3. 3

   Test the Wiring

   With the alarm disconnected, turn the ignition on (do not start the engine). Using a multimeter, measure the voltage between the signal wire pin (at the harness-side connector that plugs into the alarm) and a known good chassis ground. If you read voltage on the signal wire when the tractor is not in reverse, it confirms a short to a power source somewhere in the harness. If voltage only appears when the tractor is shifted into reverse, the signal from the CLC is likely correct.

4. 4

   Test the Alarm Unit

   If the wiring appears to be functioning correctly (no short to power when disconnected), the fault is likely within the alarm unit itself. Internal failure can cause a short that results in a high voltage reading by the CLC.

5. 5

   Replace the Faulty Component

   If the wiring harness is found to be shorted, repair the damaged section or replace the harness (OEM Part Number AL170244). If the alarm unit is suspected to be faulty, replace it with a new one (OEM Part Number AL174225).

6. 6

   Reconnect and Retest

   After replacing the faulty component, reconnect the battery. Clear any stored fault codes and operate the tractor, shifting into reverse to confirm that the alarm functions correctly and that the fault code 002392.03 does not reappear.