
Heavy Equipment Alternators: Symptoms of a Bad Alternator and How to Make Repair vs Replacement Decisions
When equipment starts acting unstable under load, the charging system may be at fault. Alternator problems in construction equipment show up as flickering lights, weak charging, controller resets and aborted regenerations. In this guide, we’ll focus on identifying the exact fault in the alternator assembly, explaining component roles and typical failures, and using voltage, ripple and drop tests to confirm the diagnosis.