Checking the armature winding

1. Check the manifold for an open circuit. Using an ohmmeter, check for continuity between the collector fins.



If there is no conductivity, then replace the armature.

2. Check if there is a short circuit in the armature winding "to ground". Using an ohmmeter, check for continuity between the collector and the armature core.



If there is continuity, then replace the armature.