New Holland 86011520 Control Module

The New Holland 86011520 is an electronic control module (ECU) chassis used on a range of NH tractors such as the 8970, 8070, 8670, 8770, and 8870 series. Common failure points for this class of units include power supply degradation, fuse or relay burnout, solder joint fatigue on the PCB, and corrupted firmware in the microcontroller. Begin troubleshooting by verifying that the module receives the correct input voltage from the tractor’s main power rail, inspecting all fuses and relays for continuity, and checking for visible signs of overheating or component damage; then review any diagnostic trouble codes stored in the ECU and perform a short‑circuit test on I/O terminals.[oss-gpt-20b]

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