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Stator Test

Using an ohmmeter, check continuity between stator leads (STEP 1 in illustration). See Fig 1 . If resistance is greater than 5 ohms, replace stator.
Using an ohmmeter, check continuity between each stator lead and stator core (STEP 2 in illustration). See Fig 1 . If continuity exists, replace stator.

Fig 1: Testing Alternator Stator

Courtesy of GENERAL MOTORS CORP.