Starter Armature: Testing and Inspection

ARMATURE CHECK
1. Check that the armature coil is not grounded.

Armature Short Circuit Test:

2. Place the armature in a growler.
3. Hold a thin steel blade parallel and just above the armature while slowly rotating in the growler. A shorted armature will cause a blade to vibrate and be attracted to the core. Replace the shorted armature.

Armature Coil Grounding Test:

4. Check the insulation between the armature coil cores and the commutator segments. They are normal if there is no continuity.

Armature Coil Open Circuit Inspection:

5. Check for continuity between the segments. The condition is normal if there is continuity.