John Deere 1877.06 – BLC: Implement Switch, Current Too High

The control module has detected that the electrical current draw on the implement switch circuit exceeds the maximum allowable threshold at the module output, indicating a likely short circuit to ground or a failed switch.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6090MC
• 6090RC
• 6100MC
• 6100RC
• 6110MC
• 6110RC

1. 1

   Inspect the implement switch and its wiring harness for physical damage, chafing, or exposed wires that could be shorting to the tractor's chassis (ground).

2. 2

   Disconnect the implement switch and inspect the connector for corrosion, moisture, or bent pins that could bridge the circuit.

3. 3

   Disconnect the implement switch and turn the key on. If the fault code changes from 'Current Too High' to an open circuit code (e.g., Voltage Too High/Open), the fault is isolated to the switch itself. If the 001877.06 code remains, the short is in the wiring harness between the switch and the BLC module.

4. 4

   Test the implement switch for internal short circuits using a multimeter (measuring resistance/continuity).

5. 5

   Verify the BLC module output pin for the implement switch to ensure the module itself is not internally shorted.

1. 1

   Turn off the tractor ignition and disconnect the negative battery cable to prevent electrical spikes.

   Turn off the tractor ignition and disconnect the negative battery cable to prevent electrical spikes.

2. 2

   Locate the implement switch.

   Locate the implement switch (typically found on the right-hand console or fender, depending on the specific implement control setup).

3. 3

   Disconnect the wiring harness from the switch.

   Disconnect the wiring harness from the switch.

4. 4

   If the wiring is at fault: Repair the damaged section of the wire by splicing and heat-shrinking, or replace the affected harness section.

   If the wiring is at fault: Repair the damaged section of the wire by splicing and heat-shrinking, or replace the affected harness section.

5. 5

   If the switch is at fault: Remove the mounting hardware/bezel and extract the faulty implement switch. Install the new replacement switch.

   If the switch is at fault: Remove the mounting hardware/bezel and extract the faulty implement switch. Install the new replacement switch.

6. 6

   Reconnect the wiring harness to the switch.

   Reconnect the wiring harness to the switch.

7. 7

   Reconnect the battery cable.

   Reconnect the battery cable.

8. 8

   Turn the ignition on and clear the stored fault codes from the BLC module.

   Turn the ignition on and clear the stored fault codes from the BLC module using a John Deere Service ADVISOR diagnostic tool or the tractor's onboard display.

9. 9

   Actuate the implement switch to verify normal operation and ensure the code does not return.

   Actuate the implement switch to verify normal operation and ensure the code does not return.