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Field Coils

Check with 110 volt test light. Place one test lead on field coil terminal strap, touch other test lead to field coil brush lead (check series coils and shunt coils separately at appropriate terminals). Lamp should light. If lamp does not light, coils are open. Check for grounds by placing one test lead on field armature strap, touch other lead to armature core or shaft.

CAUTION: Shunt coil ground lead must be disconnected and all field terminals insulated from frame when making this test.

If lamp lights, one or more coils are grounded.

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