The solenoid operation also closes the electric Circuit to the
motor. Connect one lead of the voltmeter to the solenoid
connection (terminal) that is fastened to the motor. Put the
other lead to a good ground. Activate the starter solenoid and
look at the voltmeter. A reading of battery voltage shows the
problem is in the motor. The motor must be removed for
further testing. No reading on the voltmeter shows that the
solenoid contacts do not close. This is an indication of the
need for repair to the solenoid or an adjustment to be made to
the starter pinion clearance.
Make a test with one voltmeter lead fastened to the connection
(terminal) for the small wire at the solenoid, and the other lead
to the ground. Look at the voltmeter and activate the starter
solenoid. A voltmeter reading shows that the problem is in the
solenoid. No voltmeter reading shows that the problem is in
the start switch or the wires for the start switch.
Fasten one voltmeter lead to the start switch at the connection
(terminal) for the wire from the battery. Fasten the other lead
to a good ground. No voltmeter reading indicates a broken
circuit from the battery. Make a check of the circuit breaker
and wiring. If there is a voltmeter reading, the problem is in the
star switch or in the wires for the star switch.
A starter motor that operates too slow can have an overload
because of too much friction in the engine being started. Slow
operation of the starter motor can also be caused by short
circuit, loose connections and/or dirt in the motor.
To test for correct output of starter motors and starter solenoid,
make reference to the Specifications section of the complete