Description:

The error code ETC 000876.00 is triggered when the power module (HF) PC6 measures a total amperage exceeding 40 amps at the A1, C1, and D1 outputs. This condition can indicate a short to ground or a defective component in one of the monitored circuits. The following functions are monitored together and can also trigger additional diagnostic trouble codes:

• Output A1: M02 compressor clutch (ETC 000876.00).
• Output C1: E27 beacon light (BCU 002386.00).
• Output D1: E20/R and E20/L worklights on the cab frame (BCU 523691.00).
• Output D1: E36R and E36L xenon (HID) worklights on the cab frame (BCU 523691.00).

Reaction:

When this fault is detected, the power module may deactivate the affected circuits to prevent damage due to excessive current. This can result in the loss of functionality for the compressor clutch, beacon light, and worklights.

Recommendations:

Inspect Electrical Circuits:

• Check for Shorts to Ground: Inspect the wiring and connectors for the A1, C1, and D1 outputs for signs of shorts to ground. Look for damaged insulation, exposed wires, or pinched cables.
• Measure Current Draw: Use a multimeter to measure the current draw of the M02 compressor clutch, E27 beacon light, and E20/R, E20/L, E36R, E36L worklights to ensure they are within the specified range.

Test and Replace Components:

• Test Components: Verify the operation of the M02 compressor clutch, beacon light, and worklights. Replace any components that are found to be defective or drawing excessive current.
• Inspect Power Module: Ensure that the power module (HF) PC6 is functioning correctly. Replace the power module if it is found to be faulty.

Repair or Replace Wiring:

• Fix Damaged Wiring: Repair or replace any damaged or shorted wiring in the monitored circuits. Ensure all connections are secure and properly insulated.

Note:

Regular maintenance and inspection of the electrical system can help prevent issues related to current overload. Ensuring proper routing and securing of wires can reduce the risk of shorts and enhance the reliability of the system.