Cummins N14 STC, Celect, Celect Plus – Service Manual 013-017   Starter Magnetic Switch

CAUTION  Make sure the starter switch is in the “OFF” position to prevent electrical shock.

Remove the cable connecting the magnetic switch to the starter solenoid from the magnetic switch terminal.

Connect the leads of the digital multimeter, Part Number 3377161, to the two large switch terminals.

Set the multimeter to measure resistance (OHMS).

With the starter switch off, the multimeter

must
indicate resistance at infinity, open circuit.

Turn the starter switch to the “START” position.

The multimeter

must
indicate zero (0) resistance, closed circuit.

If the multimeter indicates resistance at infinity with the starter switch in the “START” position, turn the starter switch off.

Remove the ground wire which is connected to one of the small magnetic switch terminals

Set the multimeter scale to indicate volts, 24 volts or more.

Connect the positive lead of the multimeter to the magnetic switch ground terminal and the other lead to the ground wire.

Turn the starter switch to the “START” position.

The multimeter must indicate vehicle electrical system voltage.

If the multimeter does not indicate voltage, check the voltage. Refer to Procedure 013-018 in Section 13.

Turn the starter switch to the “OFF” position.

Remove the multimeter leads.

Connect the starter solenoid cable to the magnetic switch terminal, and the ground wire to its corresponding terminal on the magnetic switch.