Cummins ISX11.9 CM2250 – Service Manual 013-019   Starter Solenoid

Use digital multimeter, Part Number 3377161, with the switch set to the VDC position

Connect the multimeter positive (+) lead to the starter solenoid positive (+) cable terminal and the negative (-) lead to a chassis or engine ground location.

The multimeter must show a voltage with the starter switch off to be normal.

If the multimeter does not indicate a voltage, check the cable connecting the starter solenoid and battery for breaks. Also, check for loose or corroded connections.

If the multimeter indicates a voltage but the starter will not operate, check the wire connecting the starter solenoid to the starter switch for breaks, and also check for loose or corroded connections.

If the wire connecting the starter solenoid and starter switch is not loose or damaged, and the starter will not operate:

• Remove the cable connecting the starter and starter solenoid from the solenoid terminal.
• Connect the multimeter positive (+) lead to the solenoid positive (+) terminal and the negative (-) lead to the chassis or an engine ground location

• Turn the starter switch to the START position.
• If the multimeter indicates a voltage, the starter solenoid is malfunctioning and must be replaced.

If the multimeter does not indicate a voltage, check the wire connecting the starter solenoid to the magnetic switch for breaks and for loose or corroded connections.

If the wire connecting the starter solenoid to the magnetic switch is not loose or damaged, and the starter will not operate:

• Check the cable connecting the starter solenoid to the starting motor for breaks and for loose or corroded connections.

• Check the cable connecting the starting motor to the battery for breaks and for loose or corroded connections.

If the cables are not loose or damaged, the starting motor is defective and must be replaced.