Harley not charging: stator failure

Applies to: Twin Cam models (Harley-Davidson), 1999–2017

Symptoms

  • Battery drains while riding
  • Voltmeter reads low
  • Lights dim at idle

Why it happens

The stator windings break down with heat, or the stator plug burns, so AC output drops.

How to fix it

  1. Check charging voltage at 2000–3000 rpm.
  2. Unplug the stator and inspect for burnt pins.
  3. Measure stator resistance and AC output against the manual.
  4. Test the regulator; replace whichever fails.

Tools and parts

  • Multimeter
  • Stator
  • Regulator

What the factory service manual covers

Charging system: stator AC output per 1000 rpm, resistance spec. The full procedure, specs and wiring diagrams are in the factory service manual for your machine.

Get the factory service manual

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