6.7L Cummins Electrical Equipment – Starter Magnetic Switch – Voltage Check

If the multimeter indicates resistance greater than 100k ohms with the keys witch in the START position:
• Turn the keys witch 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 keys witch to the START position.
• If the multimeter indicates no voltage, the magnetic switch is not the cause of the complaint. If the starter
magnetic switch is not within specification, replace the switch according to the manufacturer’s instructions.

• Turn the keys witch to the OFF position.
• Remove the multimeter leads, and connect the magnetic switch to the starter motor solenoid wire.