B5.9G, B5.9LPG – Troubleshooting and Repair Manual – 013-018   Starter Switch

WARNING  Be sure the starting motor switch is in the OFF position to avoid personal injury from electrical shock.

Digital Multimeter, Part No. 3377161

Remove the wire connecting the starting motor switch to the magnetic switch (marked “S” or START) from the starting motor switch terminal.

Connect the positive lead of digital multimeter, Part No. 3377161, or equivalent, to the starting motor switch terminal and the negative lead to a chassis or engine ground location.

NOTE: With the starting motor switch in the OFF position, there must not be voltage at the starting motor switch terminal. If the meter indicates voltage, the starting motor switch is malfunctioning and must be replaced.

Turn the starting motor switch to the START position.

The multimeter must indicate system voltage.

If there is no voltage:

• Turn the starting motor switch to the OFF position.
• Connect the multimeter positive lead to the starting motor switch terminal having a wire connecting the starting motor switch to the starting motor solenoid “B” terminal.

Turn the starter switch to the START position.

If the meter indicates system voltage at the starting motor switch input terminal, the starting motor switch is not the cause of the complaint.

Check the wiring from the starting switch to the starting motor solenoid “B” terminal, and from the starting motor solenoid to the battery for broken or damaged wires.

If the meter indicates no voltage, the switch is defective and must be replaced.

Check the wiring from the starting switch to the starting motor solenoid “B” terminal and from the starting motor solenoid to the battery for broken or damaged wires.