Starter Armature: Testing and Inspection

Armature Short-Circuit Test:

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

Armature Coil Ground Test:

ARMATURE COIL GROUND TEST
Check the insulation between each commutator segment and armature coil core.
If there is no continuity, the insulation is in order.

Armature Coil Open-Circuit Inspection:

ARMATURE COIL OPEN-CIRCUIT INSPECTION
Check the continuity between segments.
If there is continuity, the coil is in order.