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Brush Holder Test

  1. When testing brushes and brush springs, ensure brushes move smoothly in brush holder. Sticking brushes require replacement of brush holder assembly.
  2. Using an ohmmeter, touch one test lead to inner brush and other test lead to field terminal. There should be continuity. Touch one test lead to outer brush and other test lead to field terminal. There should be continuity. If either brush fails test, replace brush assembly. See Fig 1.
Fig 1: Testing Inner & Outer Brush Circuit (Bosch)
G7872Courtesy of CHRYSLER MOTORS.
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