Stator Grounds

To check stator for grounds, set an ohmmeter on x1000 scale. Connect one ohmmeter lead to stator frame and other lead to each stator lead. See Fig 1. The resistance reading should be infinity. If resistance is low, stator is grounded and must be replaced.

Fig 1: Bench Testing Stator for Grounds Also test for opens on 10 SI and 12 SI alternators.