• Measure the
of the commutator.
Replace the starter motor with a new one if the
commutator diameter is less than the service limit.
OEven if the foregoing checks show the armature to be
good. it may be defective in some manner not readily
detectable with an ohmmeter. If all other starter motor
and starter motor circuit components check good. but
the starter motor still does not turn over or only turns
replace the starter motor w
Brush Lead Inspection
ohmmeter range, measure the
ance as shown
( +) Brush and (+) Terminal
( -) Brush and End Cover
the x 1
measure the resist-
ance between any two commutator
If there is a
resistance or no reading (00) between
is open and the starter
motor must be replaced.
.Using the highest
range, measure the
ance between the segments and the shaft.
If there is any reading at all, the armature has a short and
the starter motor must be
C. (+) Terminal
If there is not close to zero ohms, the brush lead has an
Replace the terminal bolt assembly and/or the
brush holder assembly.
A. (-) Brush
B. (+) Brush