ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 013-017   Starter Magnetic Switch

Remove the cable connecting the magnetic switch to the starting motor solenoid from the magnetic switch terminal.

Set the digital multimeter, Cummins® Part Number 3164488, to measure resistance (ohms).

Connect the leads to the two large switch terminals.

With the starting motor switch in the OFF position, the multimeter must indicate resistance greater than 100k ohms.

Turn the starting motor switch to the START position.

The multimeter must indicate less than 10 ohms. If not within specifications, replace the starter magnetic switch according to the manufacturer’s instructions.

If the multimeter indicates resistance at greater than 100k ohms with the starting motor switch in the “START” position, turn the starting motor switch to the “OFF” position.

Set the multimeter scale to read DC voltage.

Connect one multimeter lead to the magnetic switch terminal marked “S” and the other lead to the ground.

Turn the starting motor switch to the “START” position.

If the multimeter indicates no voltage, the magnetic switch is not the cause of the complaint. Refer to Procedure 013-018 in Section 13.

If the starter magnetic switch is not within specification, replace the switch according to the manufacturer’s instructions.

Turn the starting motor switch to the “OFF” position.

Remove the multimeter leads and connect the magnetic switch to the starting motor solenoid wire.