Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Magnetic Switch Hold-In Test

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

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




3 If the pinion moves out, everything is in order. If the pinion moves back and forth repeatedly, the hold-in circuit is open. If it is open, replace the magnetic switch.