Diesel Data: Automotive Repair

Magnetic Switch Pull-In Test




1. Disconnect the wire from the M-terminal of the magnetic switch.
2. Connect a 12 volts battery between the S-terminal and M-terminal.

CAUTION: This test must be performed quickly (In less than 10 seconds) to prevent coil from burning.

3. If the pinion moves out, the pull-in coil is good. If it doesn't, replace starter assembly.