Starter No-Load Test
NOTE:
Starter no-load test will determine open or shorted windings, rubbing armature and bent armature shaft.
- Connect test equipment. See Fig 1 . Ensure no current is flowing through ammeter and carbon pile rheostat.
- Connect jumper wire between negative battery terminal and starter frame. Connect another jumper wire between positive battery terminal and positive terminal of starter motor. Ensure no current is flowing through ammeter.
- Turn carbon pile rheostat to maximum (counterclockwise) position and note voltmeter reading. Disconnect jumper leads from starter motor. Reduce resistance of rheostat until voltmeter reads same as when starter was running.
- Ammeter will indicate starter draw under no load. Normal starter draw under no load is 80 amps.
CAUTION:
Ensure starter is securely mounted in bench vise while energizing, as starter will move or jump.