Heavy Duty Alternator

New Diagnostic Procedures Manual

If you need help diagnosing an issue, download our new comprehensive Diagnostic Procedures Manual. The manual is a great resource for troubleshooting a heavy-duty electrical system.

It includes diagnosis charts for overcharge, undercharge and milled pinion symptoms. It also outlines several testing procedures, including battery cable tests, circuit tests, starter replacement determination and an alternator wiring test.
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