Free Running Test
- Place the starter motor in a vise equipped with soft jaws and connect a fully-charged 12-volt battery to starter motor.
- Connect a test ammeter (100-ampere scale) and carbon pile rheostat. See Fig 1
.
- Connect a voltmeter (15-volt scale) across starter motor.
- Rotate carbon pile to the off position.
- Connect the battery cable from battery's negative post to the starter motor body.
- Adjust until battery voltage shown on the voltmeter reads 11 volts.
- Confirm that amperage is 90 amps or less at 2800 RPM or less, and that starter motor turns smoothly and freely.
Courtesy of KIA MOTORS AMERICA, INC.