Starter Solenoid: Testing and Inspection

If the solenoid is not removed from the starting motor, the connector strap terminals must be removed from the terminal on the solenoid before making these tests. Complete tests in a minimum amount of time to prevent overheating of the solenoid.

HOLD-IN TEST:
1. Connect an ammeter in series with a 12 volt battery and the switch terminal on the solenoid.





2. Connect a voltmeter to the switch terminal and to ground as shown in Fig. 8.
3. Connect a carbon pile across battery.
4. Adjust the voltage to 10 volts and note the ammeter reading. It should be 14.5-16.5 amperes for all starting motors.

PULL-IN TEST:
1. Connect as previous test.
2. Ground the solenoid motor terminal.
3. Adjust the voltage to 10 volts and note the ammeter reading. It should be 41-47 amperes for all starting motors. Current will increase as windings heat up.
4. Current draw readings over specifications indicate shorted turns or a ground in the windings of the solenoid and the solenoid should be replaced.

Current draw readings that are under specifications indicate excessive resistance. No reading indicates an open circuit. Check connections then replace solenoid if necessary.